summaryrefslogtreecommitdiff
path: root/test/gtest-1.6.0/src/gtest.cc
blob: 904d9d747e0dc1d10654775e5d7e96b7d111aa9b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
// Copyright 2005, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Author: wan@google.com (Zhanyong Wan)
//
// The Google C++ Testing Framework (Google Test)

#include "gtest/gtest.h"
#include "gtest/gtest-spi.h"

#include <ctype.h>
#include <math.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <wchar.h>
#include <wctype.h>

#include <algorithm>
#include <ostream>  // NOLINT
#include <sstream>
#include <vector>

#if GTEST_OS_LINUX

// TODO(kenton@google.com): Use autoconf to detect availability of
// gettimeofday().
# define GTEST_HAS_GETTIMEOFDAY_ 1

# include <fcntl.h>  // NOLINT
# include <limits.h>  // NOLINT
# include <sched.h>  // NOLINT
// Declares vsnprintf().  This header is not available on Windows.
# include <strings.h>  // NOLINT
# include <sys/mman.h>  // NOLINT
# include <sys/time.h>  // NOLINT
# include <unistd.h>  // NOLINT
# include <string>

#elif GTEST_OS_SYMBIAN
# define GTEST_HAS_GETTIMEOFDAY_ 1
# include <sys/time.h>  // NOLINT

#elif GTEST_OS_ZOS
# define GTEST_HAS_GETTIMEOFDAY_ 1
# include <sys/time.h>  // NOLINT

// On z/OS we additionally need strings.h for strcasecmp.
# include <strings.h>  // NOLINT

#elif GTEST_OS_WINDOWS_MOBILE  // We are on Windows CE.

# include <windows.h>  // NOLINT

#elif GTEST_OS_WINDOWS  // We are on Windows proper.

# include <io.h>  // NOLINT
# include <sys/timeb.h>  // NOLINT
# include <sys/types.h>  // NOLINT
# include <sys/stat.h>  // NOLINT

# if GTEST_OS_WINDOWS_MINGW
// MinGW has gettimeofday() but not _ftime64().
// TODO(kenton@google.com): Use autoconf to detect availability of
//   gettimeofday().
// TODO(kenton@google.com): There are other ways to get the time on
//   Windows, like GetTickCount() or GetSystemTimeAsFileTime().  MinGW
//   supports these.  consider using them instead.
#  define GTEST_HAS_GETTIMEOFDAY_ 1
#  include <sys/time.h>  // NOLINT
# endif  // GTEST_OS_WINDOWS_MINGW

// cpplint thinks that the header is already included, so we want to
// silence it.
# include <windows.h>  // NOLINT

#else

// Assume other platforms have gettimeofday().
// TODO(kenton@google.com): Use autoconf to detect availability of
//   gettimeofday().
# define GTEST_HAS_GETTIMEOFDAY_ 1

// cpplint thinks that the header is already included, so we want to
// silence it.
# include <sys/time.h>  // NOLINT
# include <unistd.h>  // NOLINT

#endif  // GTEST_OS_LINUX

#if GTEST_HAS_EXCEPTIONS
# include <stdexcept>
#endif

#if GTEST_CAN_STREAM_RESULTS_
# include <arpa/inet.h>  // NOLINT
# include <netdb.h>  // NOLINT
#endif

// Indicates that this translation unit is part of Google Test's
// implementation.  It must come before gtest-internal-inl.h is
// included, or there will be a compiler error.  This trick is to
// prevent a user from accidentally including gtest-internal-inl.h in
// his code.
#define GTEST_IMPLEMENTATION_ 1
#include "src/gtest-internal-inl.h"
#undef GTEST_IMPLEMENTATION_

#if GTEST_OS_WINDOWS
# define vsnprintf _vsnprintf
#endif  // GTEST_OS_WINDOWS

namespace testing {

using internal::CountIf;
using internal::ForEach;
using internal::GetElementOr;
using internal::Shuffle;

// Constants.

// A test whose test case name or test name matches this filter is
// disabled and not run.
static const char kDisableTestFilter[] = "DISABLED_*:*/DISABLED_*";

// A test case whose name matches this filter is considered a death
// test case and will be run before test cases whose name doesn't
// match this filter.
static const char kDeathTestCaseFilter[] = "*DeathTest:*DeathTest/*";

// A test filter that matches everything.
static const char kUniversalFilter[] = "*";

// The default output file for XML output.
static const char kDefaultOutputFile[] = "test_detail.xml";

// The environment variable name for the test shard index.
static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
// The environment variable name for the total number of test shards.
static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
// The environment variable name for the test shard status file.
static const char kTestShardStatusFile[] = "GTEST_SHARD_STATUS_FILE";

namespace internal {

// The text used in failure messages to indicate the start of the
// stack trace.
const char kStackTraceMarker[] = "\nStack trace:\n";

// g_help_flag is true iff the --help flag or an equivalent form is
// specified on the command line.
bool g_help_flag = false;

}  // namespace internal

GTEST_DEFINE_bool_(
    also_run_disabled_tests,
    internal::BoolFromGTestEnv("also_run_disabled_tests", false),
    "Run disabled tests too, in addition to the tests normally being run.");

GTEST_DEFINE_bool_(
    break_on_failure,
    internal::BoolFromGTestEnv("break_on_failure", false),
    "True iff a failed assertion should be a debugger break-point.");

GTEST_DEFINE_bool_(
    catch_exceptions,
    internal::BoolFromGTestEnv("catch_exceptions", true),
    "True iff " GTEST_NAME_
    " should catch exceptions and treat them as test failures.");

GTEST_DEFINE_string_(
    color,
    internal::StringFromGTestEnv("color", "auto"),
    "Whether to use colors in the output.  Valid values: yes, no, "
    "and auto.  'auto' means to use colors if the output is "
    "being sent to a terminal and the TERM environment variable "
    "is set to xterm, xterm-color, xterm-256color, linux or cygwin.");

GTEST_DEFINE_string_(
    filter,
    internal::StringFromGTestEnv("filter", kUniversalFilter),
    "A colon-separated list of glob (not regex) patterns "
    "for filtering the tests to run, optionally followed by a "
    "'-' and a : separated list of negative patterns (tests to "
    "exclude).  A test is run if it matches one of the positive "
    "patterns and does not match any of the negative patterns.");

GTEST_DEFINE_bool_(list_tests, false,
                   "List all tests without running them.");

GTEST_DEFINE_string_(
    output,
    internal::StringFromGTestEnv("output", ""),
    "A format (currently must be \"xml\"), optionally followed "
    "by a colon and an output file name or directory. A directory "
    "is indicated by a trailing pathname separator. "
    "Examples: \"xml:filename.xml\", \"xml::directoryname/\". "
    "If a directory is specified, output files will be created "
    "within that directory, with file-names based on the test "
    "executable's name and, if necessary, made unique by adding "
    "digits.");

GTEST_DEFINE_bool_(
    print_time,
    internal::BoolFromGTestEnv("print_time", true),
    "True iff " GTEST_NAME_
    " should display elapsed time in text output.");

GTEST_DEFINE_int32_(
    random_seed,
    internal::Int32FromGTestEnv("random_seed", 0),
    "Random number seed to use when shuffling test orders.  Must be in range "
    "[1, 99999], or 0 to use a seed based on the current time.");

GTEST_DEFINE_int32_(
    repeat,
    internal::Int32FromGTestEnv("repeat", 1),
    "How many times to repeat each test.  Specify a negative number "
    "for repeating forever.  Useful for shaking out flaky tests.");

GTEST_DEFINE_bool_(
    show_internal_stack_frames, false,
    "True iff " GTEST_NAME_ " should include internal stack frames when "
    "printing test failure stack traces.");

GTEST_DEFINE_bool_(
    shuffle,
    internal::BoolFromGTestEnv("shuffle", false),
    "True iff " GTEST_NAME_
    " should randomize tests' order on every run.");

GTEST_DEFINE_int32_(
    stack_trace_depth,
    internal::Int32FromGTestEnv("stack_trace_depth", kMaxStackTraceDepth),
    "The maximum number of stack frames to print when an "
    "assertion fails.  The valid range is 0 through 100, inclusive.");

GTEST_DEFINE_string_(
    stream_result_to,
    internal::StringFromGTestEnv("stream_result_to", ""),
    "This flag specifies the host name and the port number on which to stream "
    "test results. Example: \"localhost:555\". The flag is effective only on "
    "Linux.");

GTEST_DEFINE_bool_(
    throw_on_failure,
    internal::BoolFromGTestEnv("throw_on_failure", false),
    "When this flag is specified, a failed assertion will throw an exception "
    "if exceptions are enabled or exit the program with a non-zero code "
    "otherwise.");

namespace internal {

// Generates a random number from [0, range), using a Linear
// Congruential Generator (LCG).  Crashes if 'range' is 0 or greater
// than kMaxRange.
UInt32 Random::Generate(UInt32 range) {
  // These constants are the same as are used in glibc's rand(3).
  state_ = (1103515245U*state_ + 12345U) % kMaxRange;

  GTEST_CHECK_(range > 0)
      << "Cannot generate a number in the range [0, 0).";
  GTEST_CHECK_(range <= kMaxRange)
      << "Generation of a number in [0, " << range << ") was requested, "
      << "but this can only generate numbers in [0, " << kMaxRange << ").";

  // Converting via modulus introduces a bit of downward bias, but
  // it's simple, and a linear congruential generator isn't too good
  // to begin with.
  return state_ % range;
}

// GTestIsInitialized() returns true iff the user has initialized
// Google Test.  Useful for catching the user mistake of not initializing
// Google Test before calling RUN_ALL_TESTS().
//
// A user must call testing::InitGoogleTest() to initialize Google
// Test.  g_init_gtest_count is set to the number of times
// InitGoogleTest() has been called.  We don't protect this variable
// under a mutex as it is only accessed in the main thread.
int g_init_gtest_count = 0;
static bool GTestIsInitialized() { return g_init_gtest_count != 0; }

// Iterates over a vector of TestCases, keeping a running sum of the
// results of calling a given int-returning method on each.
// Returns the sum.
static int SumOverTestCaseList(const std::vector<TestCase*>& case_list,
                               int (TestCase::*method)() const) {
  int sum = 0;
  for (size_t i = 0; i < case_list.size(); i++) {
    sum += (case_list[i]->*method)();
  }
  return sum;
}

// Returns true iff the test case passed.
static bool TestCasePassed(const TestCase* test_case) {
  return test_case->should_run() && test_case->Passed();
}

// Returns true iff the test case failed.
static bool TestCaseFailed(const TestCase* test_case) {
  return test_case->should_run() && test_case->Failed();
}

// Returns true iff test_case contains at least one test that should
// run.
static bool ShouldRunTestCase(const TestCase* test_case) {
  return test_case->should_run();
}

// AssertHelper constructor.
AssertHelper::AssertHelper(TestPartResult::Type type,
                           const char* file,
                           int line,
                           const char* message)
    : data_(new AssertHelperData(type, file, line, message)) {
}

AssertHelper::~AssertHelper() {
  delete data_;
}

// Message assignment, for assertion streaming support.
void AssertHelper::operator=(const Message& message) const {
  UnitTest::GetInstance()->
    AddTestPartResult(data_->type, data_->file, data_->line,
                      AppendUserMessage(data_->message, message),
                      UnitTest::GetInstance()->impl()
                      ->CurrentOsStackTraceExceptTop(1)
                      // Skips the stack frame for this function itself.
                      );  // NOLINT
}

// Mutex for linked pointers.
GTEST_DEFINE_STATIC_MUTEX_(g_linked_ptr_mutex);

// Application pathname gotten in InitGoogleTest.
String g_executable_path;

// Returns the current application's name, removing directory path if that
// is present.
FilePath GetCurrentExecutableName() {
  FilePath result;

#if GTEST_OS_WINDOWS
  result.Set(FilePath(g_executable_path).RemoveExtension("exe"));
#else
  result.Set(FilePath(g_executable_path));
#endif  // GTEST_OS_WINDOWS

  return result.RemoveDirectoryName();
}

// Functions for processing the gtest_output flag.

// Returns the output format, or "" for normal printed output.
String UnitTestOptions::GetOutputFormat() {
  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
  if (gtest_output_flag == NULL) return String("");

  const char* const colon = strchr(gtest_output_flag, ':');
  return (colon == NULL) ?
      String(gtest_output_flag) :
      String(gtest_output_flag, colon - gtest_output_flag);
}

// Returns the name of the requested output file, or the default if none
// was explicitly specified.
String UnitTestOptions::GetAbsolutePathToOutputFile() {
  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
  if (gtest_output_flag == NULL)
    return String("");

  const char* const colon = strchr(gtest_output_flag, ':');
  if (colon == NULL)
    return String(internal::FilePath::ConcatPaths(
               internal::FilePath(
                   UnitTest::GetInstance()->original_working_dir()),
               internal::FilePath(kDefaultOutputFile)).ToString() );

  internal::FilePath output_name(colon + 1);
  if (!output_name.IsAbsolutePath())
    // TODO(wan@google.com): on Windows \some\path is not an absolute
    // path (as its meaning depends on the current drive), yet the
    // following logic for turning it into an absolute path is wrong.
    // Fix it.
    output_name = internal::FilePath::ConcatPaths(
        internal::FilePath(UnitTest::GetInstance()->original_working_dir()),
        internal::FilePath(colon + 1));

  if (!output_name.IsDirectory())
    return output_name.ToString();

  internal::FilePath result(internal::FilePath::GenerateUniqueFileName(
      output_name, internal::GetCurrentExecutableName(),
      GetOutputFormat().c_str()));
  return result.ToString();
}

// Returns true iff the wildcard pattern matches the string.  The
// first ':' or '\0' character in pattern marks the end of it.
//
// This recursive algorithm isn't very efficient, but is clear and
// works well enough for matching test names, which are short.
bool UnitTestOptions::PatternMatchesString(const char *pattern,
                                           const char *str) {
  switch (*pattern) {
    case '\0':
    case ':':  // Either ':' or '\0' marks the end of the pattern.
      return *str == '\0';
    case '?':  // Matches any single character.
      return *str != '\0' && PatternMatchesString(pattern + 1, str + 1);
    case '*':  // Matches any string (possibly empty) of characters.
      return (*str != '\0' && PatternMatchesString(pattern, str + 1)) ||
          PatternMatchesString(pattern + 1, str);
    default:  // Non-special character.  Matches itself.
      return *pattern == *str &&
          PatternMatchesString(pattern + 1, str + 1);
  }
}

bool UnitTestOptions::MatchesFilter(const String& name, const char* filter) {
  const char *cur_pattern = filter;
  for (;;) {
    if (PatternMatchesString(cur_pattern, name.c_str())) {
      return true;
    }

    // Finds the next pattern in the filter.
    cur_pattern = strchr(cur_pattern, ':');

    // Returns if no more pattern can be found.
    if (cur_pattern == NULL) {
      return false;
    }

    // Skips the pattern separater (the ':' character).
    cur_pattern++;
  }
}

// TODO(keithray): move String function implementations to gtest-string.cc.

// Returns true iff the user-specified filter matches the test case
// name and the test name.
bool UnitTestOptions::FilterMatchesTest(const String &test_case_name,
                                        const String &test_name) {
  const String& full_name = String::Format("%s.%s",
                                           test_case_name.c_str(),
                                           test_name.c_str());

  // Split --gtest_filter at '-', if there is one, to separate into
  // positive filter and negative filter portions
  const char* const p = GTEST_FLAG(filter).c_str();
  const char* const dash = strchr(p, '-');
  String positive;
  String negative;
  if (dash == NULL) {
    positive = GTEST_FLAG(filter).c_str();  // Whole string is a positive filter
    negative = String("");
  } else {
    positive = String(p, dash - p);  // Everything up to the dash
    negative = String(dash+1);       // Everything after the dash
    if (positive.empty()) {
      // Treat '-test1' as the same as '*-test1'
      positive = kUniversalFilter;
    }
  }

  // A filter is a colon-separated list of patterns.  It matches a
  // test if any pattern in it matches the test.
  return (MatchesFilter(full_name, positive.c_str()) &&
          !MatchesFilter(full_name, negative.c_str()));
}

#if GTEST_HAS_SEH
// Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
// given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
// This function is useful as an __except condition.
int UnitTestOptions::GTestShouldProcessSEH(DWORD exception_code) {
  // Google Test should handle a SEH exception if:
  //   1. the user wants it to, AND
  //   2. this is not a breakpoint exception, AND
  //   3. this is not a C++ exception (VC++ implements them via SEH,
  //      apparently).
  //
  // SEH exception code for C++ exceptions.
  // (see http://support.microsoft.com/kb/185294 for more information).
  const DWORD kCxxExceptionCode = 0xe06d7363;

  bool should_handle = true;

  if (!GTEST_FLAG(catch_exceptions))
    should_handle = false;
  else if (exception_code == EXCEPTION_BREAKPOINT)
    should_handle = false;
  else if (exception_code == kCxxExceptionCode)
    should_handle = false;

  return should_handle ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
}
#endif  // GTEST_HAS_SEH

}  // namespace internal

// The c'tor sets this object as the test part result reporter used by
// Google Test.  The 'result' parameter specifies where to report the
// results. Intercepts only failures from the current thread.
ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
    TestPartResultArray* result)
    : intercept_mode_(INTERCEPT_ONLY_CURRENT_THREAD),
      result_(result) {
  Init();
}

// The c'tor sets this object as the test part result reporter used by
// Google Test.  The 'result' parameter specifies where to report the
// results.
ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
    InterceptMode intercept_mode, TestPartResultArray* result)
    : intercept_mode_(intercept_mode),
      result_(result) {
  Init();
}

void ScopedFakeTestPartResultReporter::Init() {
  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
    old_reporter_ = impl->GetGlobalTestPartResultReporter();
    impl->SetGlobalTestPartResultReporter(this);
  } else {
    old_reporter_ = impl->GetTestPartResultReporterForCurrentThread();
    impl->SetTestPartResultReporterForCurrentThread(this);
  }
}

// The d'tor restores the test part result reporter used by Google Test
// before.
ScopedFakeTestPartResultReporter::~ScopedFakeTestPartResultReporter() {
  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
    impl->SetGlobalTestPartResultReporter(old_reporter_);
  } else {
    impl->SetTestPartResultReporterForCurrentThread(old_reporter_);
  }
}

// Increments the test part result count and remembers the result.
// This method is from the TestPartResultReporterInterface interface.
void ScopedFakeTestPartResultReporter::ReportTestPartResult(
    const TestPartResult& result) {
  result_->Append(result);
}

namespace internal {

// Returns the type ID of ::testing::Test.  We should always call this
// instead of GetTypeId< ::testing::Test>() to get the type ID of
// testing::Test.  This is to work around a suspected linker bug when
// using Google Test as a framework on Mac OS X.  The bug causes
// GetTypeId< ::testing::Test>() to return different values depending
// on whether the call is from the Google Test framework itself or
// from user test code.  GetTestTypeId() is guaranteed to always
// return the same value, as it always calls GetTypeId<>() from the
// gtest.cc, which is within the Google Test framework.
TypeId GetTestTypeId() {
  return GetTypeId<Test>();
}

// The value of GetTestTypeId() as seen from within the Google Test
// library.  This is solely for testing GetTestTypeId().
extern const TypeId kTestTypeIdInGoogleTest = GetTestTypeId();

// This predicate-formatter checks that 'results' contains a test part
// failure of the given type and that the failure message contains the
// given substring.
AssertionResult HasOneFailure(const char* /* results_expr */,
                              const char* /* type_expr */,
                              const char* /* substr_expr */,
                              const TestPartResultArray& results,
                              TestPartResult::Type type,
                              const string& substr) {
  const String expected(type == TestPartResult::kFatalFailure ?
                        "1 fatal failure" :
                        "1 non-fatal failure");
  Message msg;
  if (results.size() != 1) {
    msg << "Expected: " << expected << "\n"
        << "  Actual: " << results.size() << " failures";
    for (int i = 0; i < results.size(); i++) {
      msg << "\n" << results.GetTestPartResult(i);
    }
    return AssertionFailure() << msg;
  }

  const TestPartResult& r = results.GetTestPartResult(0);
  if (r.type() != type) {
    return AssertionFailure() << "Expected: " << expected << "\n"
                              << "  Actual:\n"
                              << r;
  }

  if (strstr(r.message(), substr.c_str()) == NULL) {
    return AssertionFailure() << "Expected: " << expected << " containing \""
                              << substr << "\"\n"
                              << "  Actual:\n"
                              << r;
  }

  return AssertionSuccess();
}

// The constructor of SingleFailureChecker remembers where to look up
// test part results, what type of failure we expect, and what
// substring the failure message should contain.
SingleFailureChecker:: SingleFailureChecker(
    const TestPartResultArray* results,
    TestPartResult::Type type,
    const string& substr)
    : results_(results),
      type_(type),
      substr_(substr) {}

// The destructor of SingleFailureChecker verifies that the given
// TestPartResultArray contains exactly one failure that has the given
// type and contains the given substring.  If that's not the case, a
// non-fatal failure will be generated.
SingleFailureChecker::~SingleFailureChecker() {
  EXPECT_PRED_FORMAT3(HasOneFailure, *results_, type_, substr_);
}

DefaultGlobalTestPartResultReporter::DefaultGlobalTestPartResultReporter(
    UnitTestImpl* unit_test) : unit_test_(unit_test) {}

void DefaultGlobalTestPartResultReporter::ReportTestPartResult(
    const TestPartResult& result) {
  unit_test_->current_test_result()->AddTestPartResult(result);
  unit_test_->listeners()->repeater()->OnTestPartResult(result);
}

DefaultPerThreadTestPartResultReporter::DefaultPerThreadTestPartResultReporter(
    UnitTestImpl* unit_test) : unit_test_(unit_test) {}

void DefaultPerThreadTestPartResultReporter::ReportTestPartResult(
    const TestPartResult& result) {
  unit_test_->GetGlobalTestPartResultReporter()->ReportTestPartResult(result);
}

// Returns the global test part result reporter.
TestPartResultReporterInterface*
UnitTestImpl::GetGlobalTestPartResultReporter() {
  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
  return global_test_part_result_repoter_;
}

// Sets the global test part result reporter.
void UnitTestImpl::SetGlobalTestPartResultReporter(
    TestPartResultReporterInterface* reporter) {
  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
  global_test_part_result_repoter_ = reporter;
}

// Returns the test part result reporter for the current thread.
TestPartResultReporterInterface*
UnitTestImpl::GetTestPartResultReporterForCurrentThread() {
  return per_thread_test_part_result_reporter_.get();
}

// Sets the test part result reporter for the current thread.
void UnitTestImpl::SetTestPartResultReporterForCurrentThread(
    TestPartResultReporterInterface* reporter) {
  per_thread_test_part_result_reporter_.set(reporter);
}

// Gets the number of successful test cases.
int UnitTestImpl::successful_test_case_count() const {
  return CountIf(test_cases_, TestCasePassed);
}

// Gets the number of failed test cases.
int UnitTestImpl::failed_test_case_count() const {
  return CountIf(test_cases_, TestCaseFailed);
}

// Gets the number of all test cases.
int UnitTestImpl::total_test_case_count() const {
  return static_cast<int>(test_cases_.size());
}

// Gets the number of all test cases that contain at least one test
// that should run.
int UnitTestImpl::test_case_to_run_count() const {
  return CountIf(test_cases_, ShouldRunTestCase);
}

// Gets the number of successful tests.
int UnitTestImpl::successful_test_count() const {
  return SumOverTestCaseList(test_cases_, &TestCase::successful_test_count);
}

// Gets the number of failed tests.
int UnitTestImpl::failed_test_count() const {
  return SumOverTestCaseList(test_cases_, &TestCase::failed_test_count);
}

// Gets the number of disabled tests.
int UnitTestImpl::disabled_test_count() const {
  return SumOverTestCaseList(test_cases_, &TestCase::disabled_test_count);
}

// Gets the number of all tests.
int UnitTestImpl::total_test_count() const {
  return SumOverTestCaseList(test_cases_, &TestCase::total_test_count);
}

// Gets the number of tests that should run.
int UnitTestImpl::test_to_run_count() const {
  return SumOverTestCaseList(test_cases_, &TestCase::test_to_run_count);
}

// Returns the current OS stack trace as a String.
//
// The maximum number of stack frames to be included is specified by
// the gtest_stack_trace_depth flag.  The skip_count parameter
// specifies the number of top frames to be skipped, which doesn't
// count against the number of frames to be included.
//
// For example, if Foo() calls Bar(), which in turn calls
// CurrentOsStackTraceExceptTop(1), Foo() will be included in the
// trace but Bar() and CurrentOsStackTraceExceptTop() won't.
String UnitTestImpl::CurrentOsStackTraceExceptTop(int skip_count) {
  (void)skip_count;
  return String("");
}

// Returns the current time in milliseconds.
TimeInMillis GetTimeInMillis() {
#if GTEST_OS_WINDOWS_MOBILE || defined(__BORLANDC__)
  // Difference between 1970-01-01 and 1601-01-01 in milliseconds.
  // http://analogous.blogspot.com/2005/04/epoch.html
  const TimeInMillis kJavaEpochToWinFileTimeDelta =
    static_cast<TimeInMillis>(116444736UL) * 100000UL;
  const DWORD kTenthMicrosInMilliSecond = 10000;

  SYSTEMTIME now_systime;
  FILETIME now_filetime;
  ULARGE_INTEGER now_int64;
  // TODO(kenton@google.com): Shouldn't this just use
  //   GetSystemTimeAsFileTime()?
  GetSystemTime(&now_systime);
  if (SystemTimeToFileTime(&now_systime, &now_filetime)) {
    now_int64.LowPart = now_filetime.dwLowDateTime;
    now_int64.HighPart = now_filetime.dwHighDateTime;
    now_int64.QuadPart = (now_int64.QuadPart / kTenthMicrosInMilliSecond) -
      kJavaEpochToWinFileTimeDelta;
    return now_int64.QuadPart;
  }
  return 0;
#elif GTEST_OS_WINDOWS && !GTEST_HAS_GETTIMEOFDAY_
  __timeb64 now;

# ifdef _MSC_VER

  // MSVC 8 deprecates _ftime64(), so we want to suppress warning 4996
  // (deprecated function) there.
  // TODO(kenton@google.com): Use GetTickCount()?  Or use
  //   SystemTimeToFileTime()
#  pragma warning(push)          // Saves the current warning state.
#  pragma warning(disable:4996)  // Temporarily disables warning 4996.
  _ftime64(&now);
#  pragma warning(pop)           // Restores the warning state.
# else

  _ftime64(&now);

# endif  // _MSC_VER

  return static_cast<TimeInMillis>(now.time) * 1000 + now.millitm;
#elif GTEST_HAS_GETTIMEOFDAY_
  struct timeval now;
  gettimeofday(&now, NULL);
  return static_cast<TimeInMillis>(now.tv_sec) * 1000 + now.tv_usec / 1000;
#else
# error "Don't know how to get the current time on your system."
#endif
}

// Utilities

// class String

// Returns the input enclosed in double quotes if it's not NULL;
// otherwise returns "(null)".  For example, "\"Hello\"" is returned
// for input "Hello".
//
// This is useful for printing a C string in the syntax of a literal.
//
// Known issue: escape sequences are not handled yet.
String String::ShowCStringQuoted(const char* c_str) {
  return c_str ? String::Format("\"%s\"", c_str) : String("(null)");
}

// Copies at most length characters from str into a newly-allocated
// piece of memory of size length+1.  The memory is allocated with new[].
// A terminating null byte is written to the memory, and a pointer to it
// is returned.  If str is NULL, NULL is returned.
static char* CloneString(const char* str, size_t length) {
  if (str == NULL) {
    return NULL;
  } else {
    char* const clone = new char[length + 1];
    posix::StrNCpy(clone, str, length);
    clone[length] = '\0';
    return clone;
  }
}

// Clones a 0-terminated C string, allocating memory using new.  The
// caller is responsible for deleting[] the return value.  Returns the
// cloned string, or NULL if the input is NULL.
const char * String::CloneCString(const char* c_str) {
  return (c_str == NULL) ?
                    NULL : CloneString(c_str, strlen(c_str));
}

#if GTEST_OS_WINDOWS_MOBILE
// Creates a UTF-16 wide string from the given ANSI string, allocating
// memory using new. The caller is responsible for deleting the return
// value using delete[]. Returns the wide string, or NULL if the
// input is NULL.
LPCWSTR String::AnsiToUtf16(const char* ansi) {
  if (!ansi) return NULL;
  const int length = strlen(ansi);
  const int unicode_length =
      MultiByteToWideChar(CP_ACP, 0, ansi, length,
                          NULL, 0);
  WCHAR* unicode = new WCHAR[unicode_length + 1];
  MultiByteToWideChar(CP_ACP, 0, ansi, length,
                      unicode, unicode_length);
  unicode[unicode_length] = 0;
  return unicode;
}

// Creates an ANSI string from the given wide string, allocating
// memory using new. The caller is responsible for deleting the return
// value using delete[]. Returns the ANSI string, or NULL if the
// input is NULL.
const char* String::Utf16ToAnsi(LPCWSTR utf16_str)  {
  if (!utf16_str) return NULL;
  const int ansi_length =
      WideCharToMultiByte(CP_ACP, 0, utf16_str, -1,
                          NULL, 0, NULL, NULL);
  char* ansi = new char[ansi_length + 1];
  WideCharToMultiByte(CP_ACP, 0, utf16_str, -1,
                      ansi, ansi_length, NULL, NULL);
  ansi[ansi_length] = 0;
  return ansi;
}

#endif  // GTEST_OS_WINDOWS_MOBILE

// Compares two C strings.  Returns true iff they have the same content.
//
// Unlike strcmp(), this function can handle NULL argument(s).  A NULL
// C string is considered different to any non-NULL C string,
// including the empty string.
bool String::CStringEquals(const char * lhs, const char * rhs) {
  if ( lhs == NULL ) return rhs == NULL;

  if ( rhs == NULL ) return false;

  return strcmp(lhs, rhs) == 0;
}

#if GTEST_HAS_STD_WSTRING || GTEST_HAS_GLOBAL_WSTRING

// Converts an array of wide chars to a narrow string using the UTF-8
// encoding, and streams the result to the given Message object.
static void StreamWideCharsToMessage(const wchar_t* wstr, size_t length,
                                     Message* msg) {
  // TODO(wan): consider allowing a testing::String object to
  // contain '\0'.  This will make it behave more like std::string,
  // and will allow ToUtf8String() to return the correct encoding
  // for '\0' s.t. we can get rid of the conditional here (and in
  // several other places).
  for (size_t i = 0; i != length; ) {  // NOLINT
    if (wstr[i] != L'\0') {
      *msg << WideStringToUtf8(wstr + i, static_cast<int>(length - i));
      while (i != length && wstr[i] != L'\0')
        i++;
    } else {
      *msg << '\0';
      i++;
    }
  }
}

#endif  // GTEST_HAS_STD_WSTRING || GTEST_HAS_GLOBAL_WSTRING

}  // namespace internal

#if GTEST_HAS_STD_WSTRING
// Converts the given wide string to a narrow string using the UTF-8
// encoding, and streams the result to this Message object.
Message& Message::operator <<(const ::std::wstring& wstr) {
  internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
  return *this;
}
#endif  // GTEST_HAS_STD_WSTRING

#if GTEST_HAS_GLOBAL_WSTRING
// Converts the given wide string to a narrow string using the UTF-8
// encoding, and streams the result to this Message object.
Message& Message::operator <<(const ::wstring& wstr) {
  internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
  return *this;
}
#endif  // GTEST_HAS_GLOBAL_WSTRING

// AssertionResult constructors.
// Used in EXPECT_TRUE/FALSE(assertion_result).
AssertionResult::AssertionResult(const AssertionResult& other)
    : success_(other.success_),
      message_(other.message_.get() != NULL ?
               new ::std::string(*other.message_) :
               static_cast< ::std::string*>(NULL)) {
}

// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
AssertionResult AssertionResult::operator!() const {
  AssertionResult negation(!success_);
  if (message_.get() != NULL)
    negation << *message_;
  return negation;
}

// Makes a successful assertion result.
AssertionResult AssertionSuccess() {
  return AssertionResult(true);
}

// Makes a failed assertion result.
AssertionResult AssertionFailure() {
  return AssertionResult(false);
}

// Makes a failed assertion result with the given failure message.
// Deprecated; use AssertionFailure() << message.
AssertionResult AssertionFailure(const Message& message) {
  return AssertionFailure() << message;
}

namespace internal {

// Constructs and returns the message for an equality assertion
// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
//
// The first four parameters are the expressions used in the assertion
// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
// where foo is 5 and bar is 6, we have:
//
//   expected_expression: "foo"
//   actual_expression:   "bar"
//   expected_value:      "5"
//   actual_value:        "6"
//
// The ignoring_case parameter is true iff the assertion is a
// *_STRCASEEQ*.  When it's true, the string " (ignoring case)" will
// be inserted into the message.
AssertionResult EqFailure(const char* expected_expression,
                          const char* actual_expression,
                          const String& expected_value,
                          const String& actual_value,
                          bool ignoring_case) {
  Message msg;
  msg << "Value of: " << actual_expression;
  if (actual_value != actual_expression) {
    msg << "\n  Actual: " << actual_value;
  }

  msg << "\nExpected: " << expected_expression;
  if (ignoring_case) {
    msg << " (ignoring case)";
  }
  if (expected_value != expected_expression) {
    msg << "\nWhich is: " << expected_value;
  }

  return AssertionFailure() << msg;
}

// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
String GetBoolAssertionFailureMessage(const AssertionResult& assertion_result,
                                      const char* expression_text,
                                      const char* actual_predicate_value,
                                      const char* expected_predicate_value) {
  const char* actual_message = assertion_result.message();
  Message msg;
  msg << "Value of: " << expression_text
      << "\n  Actual: " << actual_predicate_value;
  if (actual_message[0] != '\0')
    msg << " (" << actual_message << ")";
  msg << "\nExpected: " << expected_predicate_value;
  return msg.GetString();
}

// Helper function for implementing ASSERT_NEAR.
AssertionResult DoubleNearPredFormat(const char* expr1,
                                     const char* expr2,
                                     const char* abs_error_expr,
                                     double val1,
                                     double val2,
                                     double abs_error) {
  const double diff = fabs(val1 - val2);
  if (diff <= abs_error) return AssertionSuccess();

  // TODO(wan): do not print the value of an expression if it's
  // already a literal.
  return AssertionFailure()
      << "The difference between " << expr1 << " and " << expr2
      << " is " << diff << ", which exceeds " << abs_error_expr << ", where\n"
      << expr1 << " evaluates to " << val1 << ",\n"
      << expr2 << " evaluates to " << val2 << ", and\n"
      << abs_error_expr << " evaluates to " << abs_error << ".";
}


// Helper template for implementing FloatLE() and DoubleLE().
template <typename RawType>
AssertionResult FloatingPointLE(const char* expr1,
                                const char* expr2,
                                RawType val1,
                                RawType val2) {
  // Returns success if val1 is less than val2,
  if (val1 < val2) {
    return AssertionSuccess();
  }

  // or if val1 is almost equal to val2.
  const FloatingPoint<RawType> lhs(val1), rhs(val2);
  if (lhs.AlmostEquals(rhs)) {
    return AssertionSuccess();
  }

  // Note that the above two checks will both fail if either val1 or
  // val2 is NaN, as the IEEE floating-point standard requires that
  // any predicate involving a NaN must return false.

  ::std::stringstream val1_ss;
  val1_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
          << val1;

  ::std::stringstream val2_ss;
  val2_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
          << val2;

  return AssertionFailure()
      << "Expected: (" << expr1 << ") <= (" << expr2 << ")\n"
      << "  Actual: " << StringStreamToString(&val1_ss) << " vs "
      << StringStreamToString(&val2_ss);
}

}  // namespace internal

// Asserts that val1 is less than, or almost equal to, val2.  Fails
// otherwise.  In particular, it fails if either val1 or val2 is NaN.
AssertionResult FloatLE(const char* expr1, const char* expr2,
                        float val1, float val2) {
  return internal::FloatingPointLE<float>(expr1, expr2, val1, val2);
}

// Asserts that val1 is less than, or almost equal to, val2.  Fails
// otherwise.  In particular, it fails if either val1 or val2 is NaN.
AssertionResult DoubleLE(const char* expr1, const char* expr2,
                         double val1, double val2) {
  return internal::FloatingPointLE<double>(expr1, expr2, val1, val2);
}

namespace internal {

// The helper function for {ASSERT|EXPECT}_EQ with int or enum
// arguments.
AssertionResult CmpHelperEQ(const char* expected_expression,
                            const char* actual_expression,
                            BiggestInt expected,
                            BiggestInt actual) {
  if (expected == actual) {
    return AssertionSuccess();
  }

  return EqFailure(expected_expression,
                   actual_expression,
                   FormatForComparisonFailureMessage(expected, actual),
                   FormatForComparisonFailureMessage(actual, expected),
                   false);
}

// A macro for implementing the helper functions needed to implement
// ASSERT_?? and EXPECT_?? with integer or enum arguments.  It is here
// just to avoid copy-and-paste of similar code.
#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
                                   BiggestInt val1, BiggestInt val2) {\
  if (val1 op val2) {\
    return AssertionSuccess();\
  } else {\
    return AssertionFailure() \
        << "Expected: (" << expr1 << ") " #op " (" << expr2\
        << "), actual: " << FormatForComparisonFailureMessage(val1, val2)\
        << " vs " << FormatForComparisonFailureMessage(val2, val1);\
  }\
}

// Implements the helper function for {ASSERT|EXPECT}_NE with int or
// enum arguments.
GTEST_IMPL_CMP_HELPER_(NE, !=)
// Implements the helper function for {ASSERT|EXPECT}_LE with int or
// enum arguments.
GTEST_IMPL_CMP_HELPER_(LE, <=)
// Implements the helper function for {ASSERT|EXPECT}_LT with int or
// enum arguments.
GTEST_IMPL_CMP_HELPER_(LT, < )
// Implements the helper function for {ASSERT|EXPECT}_GE with int or
// enum arguments.
GTEST_IMPL_CMP_HELPER_(GE, >=)
// Implements the helper function for {ASSERT|EXPECT}_GT with int or
// enum arguments.
GTEST_IMPL_CMP_HELPER_(GT, > )

#undef GTEST_IMPL_CMP_HELPER_

// The helper function for {ASSERT|EXPECT}_STREQ.
AssertionResult CmpHelperSTREQ(const char* expected_expression,
                               const char* actual_expression,
                               const char* expected,
                               const char* actual) {
  if (String::CStringEquals(expected, actual)) {
    return AssertionSuccess();
  }

  return EqFailure(expected_expression,
                   actual_expression,
                   String::ShowCStringQuoted(expected),
                   String::ShowCStringQuoted(actual),
                   false);
}

// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
AssertionResult CmpHelperSTRCASEEQ(const char* expected_expression,
                                   const char* actual_expression,
                                   const char* expected,
                                   const char* actual) {
  if (String::CaseInsensitiveCStringEquals(expected, actual)) {
    return AssertionSuccess();
  }

  return EqFailure(expected_expression,
                   actual_expression,
                   String::ShowCStringQuoted(expected),
                   String::ShowCStringQuoted(actual),
                   true);
}

// The helper function for {ASSERT|EXPECT}_STRNE.
AssertionResult CmpHelperSTRNE(const char* s1_expression,
                               const char* s2_expression,
                               const char* s1,
                               const char* s2) {
  if (!String::CStringEquals(s1, s2)) {
    return AssertionSuccess();
  } else {
    return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
                              << s2_expression << "), actual: \""
                              << s1 << "\" vs \"" << s2 << "\"";
  }
}

// The helper function for {ASSERT|EXPECT}_STRCASENE.
AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
                                   const char* s2_expression,
                                   const char* s1,
                                   const char* s2) {
  if (!String::CaseInsensitiveCStringEquals(s1, s2)) {
    return AssertionSuccess();
  } else {
    return AssertionFailure()
        << "Expected: (" << s1_expression << ") != ("
        << s2_expression << ") (ignoring case), actual: \""
        << s1 << "\" vs \"" << s2 << "\"";
  }
}

}  // namespace internal

namespace {

// Helper functions for implementing IsSubString() and IsNotSubstring().

// This group of overloaded functions return true iff needle is a
// substring of haystack.  NULL is considered a substring of itself
// only.

bool IsSubstringPred(const char* needle, const char* haystack) {
  if (needle == NULL || haystack == NULL)
    return needle == haystack;

  return strstr(haystack, needle) != NULL;
}

bool IsSubstringPred(const wchar_t* needle, const wchar_t* haystack) {
  if (needle == NULL || haystack == NULL)
    return needle == haystack;

  return wcsstr(haystack, needle) != NULL;
}

// StringType here can be either ::std::string or ::std::wstring.
template <typename StringType>
bool IsSubstringPred(const StringType& needle,
                     const StringType& haystack) {
  return haystack.find(needle) != StringType::npos;
}

// This function implements either IsSubstring() or IsNotSubstring(),
// depending on the value of the expected_to_be_substring parameter.
// StringType here can be const char*, const wchar_t*, ::std::string,
// or ::std::wstring.
template <typename StringType>
AssertionResult IsSubstringImpl(
    bool expected_to_be_substring,
    const char* needle_expr, const char* haystack_expr,
    const StringType& needle, const StringType& haystack) {
  if (IsSubstringPred(needle, haystack) == expected_to_be_substring)
    return AssertionSuccess();

  const bool is_wide_string = sizeof(needle[0]) > 1;
  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
  return AssertionFailure()
      << "Value of: " << needle_expr << "\n"
      << "  Actual: " << begin_string_quote << needle << "\"\n"
      << "Expected: " << (expected_to_be_substring ? "" : "not ")
      << "a substring of " << haystack_expr << "\n"
      << "Which is: " << begin_string_quote << haystack << "\"";
}

}  // namespace

// IsSubstring() and IsNotSubstring() check whether needle is a
// substring of haystack (NULL is considered a substring of itself
// only), and return an appropriate error message when they fail.

AssertionResult IsSubstring(
    const char* needle_expr, const char* haystack_expr,
    const char* needle, const char* haystack) {
  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
}

AssertionResult IsSubstring(
    const char* needle_expr, const char* haystack_expr,
    const wchar_t* needle, const wchar_t* haystack) {
  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
}

AssertionResult IsNotSubstring(
    const char* needle_expr, const char* haystack_expr,
    const char* needle, const char* haystack) {
  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
}

AssertionResult IsNotSubstring(
    const char* needle_expr, const char* haystack_expr,
    const wchar_t* needle, const wchar_t* haystack) {
  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
}

AssertionResult IsSubstring(
    const char* needle_expr, const char* haystack_expr,
    const ::std::string& needle, const ::std::string& haystack) {
  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
}

AssertionResult IsNotSubstring(
    const char* needle_expr, const char* haystack_expr,
    const ::std::string& needle, const ::std::string& haystack) {
  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
}

#if GTEST_HAS_STD_WSTRING
AssertionResult IsSubstring(
    const char* needle_expr, const char* haystack_expr,
    const ::std::wstring& needle, const ::std::wstring& haystack) {
  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
}

AssertionResult IsNotSubstring(
    const char* needle_expr, const char* haystack_expr,
    const ::std::wstring& needle, const ::std::wstring& haystack) {
  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
}
#endif  // GTEST_HAS_STD_WSTRING

namespace internal {

#if GTEST_OS_WINDOWS

namespace {

// Helper function for IsHRESULT{SuccessFailure} predicates
AssertionResult HRESULTFailureHelper(const char* expr,
                                     const char* expected,
                                     long hr) {  // NOLINT
# if GTEST_OS_WINDOWS_MOBILE

  // Windows CE doesn't support FormatMessage.
  const char error_text[] = "";

# else

  // Looks up the human-readable system message for the HRESULT code
  // and since we're not passing any params to FormatMessage, we don't
  // want inserts expanded.
  const DWORD kFlags = FORMAT_MESSAGE_FROM_SYSTEM |
                       FORMAT_MESSAGE_IGNORE_INSERTS;
  const DWORD kBufSize = 4096;  // String::Format can't exceed this length.
  // Gets the system's human readable message string for this HRESULT.
  char error_text[kBufSize] = { '\0' };
  DWORD message_length = ::FormatMessageA(kFlags,
                                          0,  // no source, we're asking system
                                          hr,  // the error
                                          0,  // no line width restrictions
                                          error_text,  // output buffer
                                          kBufSize,  // buf size
                                          NULL);  // no arguments for inserts
  // Trims tailing white space (FormatMessage leaves a trailing cr-lf)
  for (; message_length && IsSpace(error_text[message_length - 1]);
          --message_length) {
    error_text[message_length - 1] = '\0';
  }

# endif  // GTEST_OS_WINDOWS_MOBILE

  const String error_hex(String::Format("0x%08X ", hr));
  return ::testing::AssertionFailure()
      << "Expected: " << expr << " " << expected << ".\n"
      << "  Actual: " << error_hex << error_text << "\n";
}

}  // namespace

AssertionResult IsHRESULTSuccess(const char* expr, long hr) {  // NOLINT
  if (SUCCEEDED(hr)) {
    return AssertionSuccess();
  }
  return HRESULTFailureHelper(expr, "succeeds", hr);
}

AssertionResult IsHRESULTFailure(const char* expr, long hr) {  // NOLINT
  if (FAILED(hr)) {
    return AssertionSuccess();
  }
  return HRESULTFailureHelper(expr, "fails", hr);
}

#endif  // GTEST_OS_WINDOWS

// Utility functions for encoding Unicode text (wide strings) in
// UTF-8.

// A Unicode code-point can have upto 21 bits, and is encoded in UTF-8
// like this:
//
// Code-point length   Encoding
//   0 -  7 bits       0xxxxxxx
//   8 - 11 bits       110xxxxx 10xxxxxx
//  12 - 16 bits       1110xxxx 10xxxxxx 10xxxxxx
//  17 - 21 bits       11110xxx 10xxxxxx 10xxxxxx 10xxxxxx

// The maximum code-point a one-byte UTF-8 sequence can represent.
const UInt32 kMaxCodePoint1 = (static_cast<UInt32>(1) <<  7) - 1;

// The maximum code-point a two-byte UTF-8 sequence can represent.
const UInt32 kMaxCodePoint2 = (static_cast<UInt32>(1) << (5 + 6)) - 1;

// The maximum code-point a three-byte UTF-8 sequence can represent.
const UInt32 kMaxCodePoint3 = (static_cast<UInt32>(1) << (4 + 2*6)) - 1;

// The maximum code-point a four-byte UTF-8 sequence can represent.
const UInt32 kMaxCodePoint4 = (static_cast<UInt32>(1) << (3 + 3*6)) - 1;

// Chops off the n lowest bits from a bit pattern.  Returns the n
// lowest bits.  As a side effect, the original bit pattern will be
// shifted to the right by n bits.
inline UInt32 ChopLowBits(UInt32* bits, int n) {
  const UInt32 low_bits = *bits & ((static_cast<UInt32>(1) << n) - 1);
  *bits >>= n;
  return low_bits;
}

// Converts a Unicode code point to a narrow string in UTF-8 encoding.
// code_point parameter is of type UInt32 because wchar_t may not be
// wide enough to contain a code point.
// The output buffer str must containt at least 32 characters.
// The function returns the address of the output buffer.
// If the code_point is not a valid Unicode code point
// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be output
// as '(Invalid Unicode 0xXXXXXXXX)'.
char* CodePointToUtf8(UInt32 code_point, char* str) {
  if (code_point <= kMaxCodePoint1) {
    str[1] = '\0';
    str[0] = static_cast<char>(code_point);                          // 0xxxxxxx
  } else if (code_point <= kMaxCodePoint2) {
    str[2] = '\0';
    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
    str[0] = static_cast<char>(0xC0 | code_point);                   // 110xxxxx
  } else if (code_point <= kMaxCodePoint3) {
    str[3] = '\0';
    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
    str[0] = static_cast<char>(0xE0 | code_point);                   // 1110xxxx
  } else if (code_point <= kMaxCodePoint4) {
    str[4] = '\0';
    str[3] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
    str[0] = static_cast<char>(0xF0 | code_point);                   // 11110xxx
  } else {
    // The longest string String::Format can produce when invoked
    // with these parameters is 28 character long (not including
    // the terminating nul character). We are asking for 32 character
    // buffer just in case. This is also enough for strncpy to
    // null-terminate the destination string.
    posix::StrNCpy(
        str, String::Format("(Invalid Unicode 0x%X)", code_point).c_str(), 32);
    str[31] = '\0';  // Makes sure no change in the format to strncpy leaves
                     // the result unterminated.
  }
  return str;
}

// The following two functions only make sense if the the system
// uses UTF-16 for wide string encoding. All supported systems
// with 16 bit wchar_t (Windows, Cygwin, Symbian OS) do use UTF-16.

// Determines if the arguments constitute UTF-16 surrogate pair
// and thus should be combined into a single Unicode code point
// using CreateCodePointFromUtf16SurrogatePair.
inline bool IsUtf16SurrogatePair(wchar_t first, wchar_t second) {
  return sizeof(wchar_t) == 2 &&
      (first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
}

// Creates a Unicode code point from UTF16 surrogate pair.
inline UInt32 CreateCodePointFromUtf16SurrogatePair(wchar_t first,
                                                    wchar_t second) {
  const UInt32 mask = (1 << 10) - 1;
  return (sizeof(wchar_t) == 2) ?
      (((first & mask) << 10) | (second & mask)) + 0x10000 :
      // This function should not be called when the condition is
      // false, but we provide a sensible default in case it is.
      static_cast<UInt32>(first);
}

// Converts a wide string to a narrow string in UTF-8 encoding.
// The wide string is assumed to have the following encoding:
//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin, Symbian OS)
//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
// Parameter str points to a null-terminated wide string.
// Parameter num_chars may additionally limit the number
// of wchar_t characters processed. -1 is used when the entire string
// should be processed.
// If the string contains code points that are not valid Unicode code points
// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
// and contains invalid UTF-16 surrogate pairs, values in those pairs
// will be encoded as individual Unicode characters from Basic Normal Plane.
String WideStringToUtf8(const wchar_t* str, int num_chars) {
  if (num_chars == -1)
    num_chars = static_cast<int>(wcslen(str));

  ::std::stringstream stream;
  for (int i = 0; i < num_chars; ++i) {
    UInt32 unicode_code_point;

    if (str[i] == L'\0') {
      break;
    } else if (i + 1 < num_chars && IsUtf16SurrogatePair(str[i], str[i + 1])) {
      unicode_code_point = CreateCodePointFromUtf16SurrogatePair(str[i],
                                                                 str[i + 1]);
      i++;
    } else {
      unicode_code_point = static_cast<UInt32>(str[i]);
    }

    char buffer[32];  // CodePointToUtf8 requires a buffer this big.
    stream << CodePointToUtf8(unicode_code_point, buffer);
  }
  return StringStreamToString(&stream);
}

// Converts a wide C string to a String using the UTF-8 encoding.
// NULL will be converted to "(null)".
String String::ShowWideCString(const wchar_t * wide_c_str) {
  if (wide_c_str == NULL) return String("(null)");

  return String(internal::WideStringToUtf8(wide_c_str, -1).c_str());
}

// Similar to ShowWideCString(), except that this function encloses
// the converted string in double quotes.
String String::ShowWideCStringQuoted(const wchar_t* wide_c_str) {
  if (wide_c_str == NULL) return String("(null)");

  return String::Format("L\"%s\"",
                        String::ShowWideCString(wide_c_str).c_str());
}

// Compares two wide C strings.  Returns true iff they have the same
// content.
//
// Unlike wcscmp(), this function can handle NULL argument(s).  A NULL
// C string is considered different to any non-NULL C string,
// including the empty string.
bool String::WideCStringEquals(const wchar_t * lhs, const wchar_t * rhs) {
  if (lhs == NULL) return rhs == NULL;

  if (rhs == NULL) return false;

  return wcscmp(lhs, rhs) == 0;
}

// Helper function for *_STREQ on wide strings.
AssertionResult CmpHelperSTREQ(const char* expected_expression,
                               const char* actual_expression,
                               const wchar_t* expected,
                               const wchar_t* actual) {
  if (String::WideCStringEquals(expected, actual)) {
    return AssertionSuccess();
  }

  return EqFailure(expected_expression,
                   actual_expression,
                   String::ShowWideCStringQuoted(expected),
                   String::ShowWideCStringQuoted(actual),
                   false);
}

// Helper function for *_STRNE on wide strings.
AssertionResult CmpHelperSTRNE(const char* s1_expression,
                               const char* s2_expression,
                               const wchar_t* s1,
                               const wchar_t* s2) {
  if (!String::WideCStringEquals(s1, s2)) {
    return AssertionSuccess();
  }

  return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
                            << s2_expression << "), actual: "
                            << String::ShowWideCStringQuoted(s1)
                            << " vs " << String::ShowWideCStringQuoted(s2);
}

// Compares two C strings, ignoring case.  Returns true iff they have
// the same content.
//
// Unlike strcasecmp(), this function can handle NULL argument(s).  A
// NULL C string is considered different to any non-NULL C string,
// including the empty string.
bool String::CaseInsensitiveCStringEquals(const char * lhs, const char * rhs) {
  if (lhs == NULL)
    return rhs == NULL;
  if (rhs == NULL)
    return false;
  return posix::StrCaseCmp(lhs, rhs) == 0;
}

  // Compares two wide C strings, ignoring case.  Returns true iff they
  // have the same content.
  //
  // Unlike wcscasecmp(), this function can handle NULL argument(s).
  // A NULL C string is considered different to any non-NULL wide C string,
  // including the empty string.
  // NB: The implementations on different platforms slightly differ.
  // On windows, this method uses _wcsicmp which compares according to LC_CTYPE
  // environment variable. On GNU platform this method uses wcscasecmp
  // which compares according to LC_CTYPE category of the current locale.
  // On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
  // current locale.
bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
                                              const wchar_t* rhs) {
  if (lhs == NULL) return rhs == NULL;

  if (rhs == NULL) return false;

#if GTEST_OS_WINDOWS
  return _wcsicmp(lhs, rhs) == 0;
#elif GTEST_OS_LINUX && !GTEST_OS_LINUX_ANDROID
  return wcscasecmp(lhs, rhs) == 0;
#else
  // Android, Mac OS X and Cygwin don't define wcscasecmp.
  // Other unknown OSes may not define it either.
  wint_t left, right;
  do {
    left = towlower(*lhs++);
    right = towlower(*rhs++);
  } while (left && left == right);
  return left == right;
#endif  // OS selector
}

// Compares this with another String.
// Returns < 0 if this is less than rhs, 0 if this is equal to rhs, or > 0
// if this is greater than rhs.
int String::Compare(const String & rhs) const {
  const char* const lhs_c_str = c_str();
  const char* const rhs_c_str = rhs.c_str();

  if (lhs_c_str == NULL) {
    return rhs_c_str == NULL ? 0 : -1;  // NULL < anything except NULL
  } else if (rhs_c_str == NULL) {
    return 1;
  }

  const size_t shorter_str_len =
      length() <= rhs.length() ? length() : rhs.length();
  for (size_t i = 0; i != shorter_str_len; i++) {
    if (lhs_c_str[i] < rhs_c_str[i]) {
      return -1;
    } else if (lhs_c_str[i] > rhs_c_str[i]) {
      return 1;
    }
  }
  return (length() < rhs.length()) ? -1 :
      (length() > rhs.length()) ? 1 : 0;
}

// Returns true iff this String ends with the given suffix.  *Any*
// String is considered to end with a NULL or empty suffix.
bool String::EndsWith(const char* suffix) const {
  if (suffix == NULL || CStringEquals(suffix, "")) return true;

  if (c_str() == NULL) return false;

  const size_t this_len = strlen(c_str());
  const size_t suffix_len = strlen(suffix);
  return (this_len >= suffix_len) &&
         CStringEquals(c_str() + this_len - suffix_len, suffix);
}

// Returns true iff this String ends with the given suffix, ignoring case.
// Any String is considered to end with a NULL or empty suffix.
bool String::EndsWithCaseInsensitive(const char* suffix) const {
  if (suffix == NULL || CStringEquals(suffix, "")) return true;

  if (c_str() == NULL) return false;

  const size_t this_len = strlen(c_str());
  const size_t suffix_len = strlen(suffix);
  return (this_len >= suffix_len) &&
         CaseInsensitiveCStringEquals(c_str() + this_len - suffix_len, suffix);
}

// Formats a list of arguments to a String, using the same format
// spec string as for printf.
//
// We do not use the StringPrintf class as it is not universally
// available.
//
// The result is limited to 4096 characters (including the tailing 0).
// If 4096 characters are not enough to format the input, or if
// there's an error, "<formatting error or buffer exceeded>" is
// returned.
String String::Format(const char * format, ...) {
  va_list args;
  va_start(args, format);

  char buffer[4096];
  const int kBufferSize = sizeof(buffer)/sizeof(buffer[0]);

  // MSVC 8 deprecates vsnprintf(), so we want to suppress warning
  // 4996 (deprecated function) there.
#ifdef _MSC_VER  // We are using MSVC.
# pragma warning(push)          // Saves the current warning state.
# pragma warning(disable:4996)  // Temporarily disables warning 4996.

  const int size = vsnprintf(buffer, kBufferSize, format, args);

# pragma warning(pop)           // Restores the warning state.
#else  // We are not using MSVC.
  const int size = vsnprintf(buffer, kBufferSize, format, args);
#endif  // _MSC_VER
  va_end(args);

  // vsnprintf()'s behavior is not portable.  When the buffer is not
  // big enough, it returns a negative value in MSVC, and returns the
  // needed buffer size on Linux.  When there is an output error, it
  // always returns a negative value.  For simplicity, we lump the two
  // error cases together.
  if (size < 0 || size >= kBufferSize) {
    return String("<formatting error or buffer exceeded>");
  } else {
    return String(buffer, size);
  }
}

// Converts the buffer in a stringstream to a String, converting NUL
// bytes to "\\0" along the way.
String StringStreamToString(::std::stringstream* ss) {
  const ::std::string& str = ss->str();
  const char* const start = str.c_str();
  const char* const end = start + str.length();

  // We need to use a helper stringstream to do this transformation
  // because String doesn't support push_back().
  ::std::stringstream helper;
  for (const char* ch = start; ch != end; ++ch) {
    if (*ch == '\0') {
      helper << "\\0";  // Replaces NUL with "\\0";
    } else {
      helper.put(*ch);
    }
  }

  return String(helper.str().c_str());
}

// Appends the user-supplied message to the Google-Test-generated message.
String AppendUserMessage(const String& gtest_msg,
                         const Message& user_msg) {
  // Appends the user message if it's non-empty.
  const String user_msg_string = user_msg.GetString();
  if (user_msg_string.empty()) {
    return gtest_msg;
  }

  Message msg;
  msg << gtest_msg << "\n" << user_msg_string;

  return msg.GetString();
}

}  // namespace internal

// class TestResult

// Creates an empty TestResult.
TestResult::TestResult()
    : death_test_count_(0),
      elapsed_time_(0) {
}

// D'tor.
TestResult::~TestResult() {
}

// Returns the i-th test part result among all the results. i can
// range from 0 to total_part_count() - 1. If i is not in that range,
// aborts the program.
const TestPartResult& TestResult::GetTestPartResult(int i) const {
  if (i < 0 || i >= total_part_count())
    internal::posix::Abort();
  return test_part_results_.at(i);
}

// Returns the i-th test property. i can range from 0 to
// test_property_count() - 1. If i is not in that range, aborts the
// program.
const TestProperty& TestResult::GetTestProperty(int i) const {
  if (i < 0 || i >= test_property_count())
    internal::posix::Abort();
  return test_properties_.at(i);
}

// Clears the test part results.
void TestResult::ClearTestPartResults() {
  test_part_results_.clear();
}

// Adds a test part result to the list.
void TestResult::AddTestPartResult(const TestPartResult& test_part_result) {
  test_part_results_.push_back(test_part_result);
}

// Adds a test property to the list. If a property with the same key as the
// supplied property is already represented, the value of this test_property
// replaces the old value for that key.
void TestResult::RecordProperty(const TestProperty& test_property) {
  if (!ValidateTestProperty(test_property)) {
    return;
  }
  internal::MutexLock lock(&test_properites_mutex_);
  const std::vector<TestProperty>::iterator property_with_matching_key =
      std::find_if(test_properties_.begin(), test_properties_.end(),
                   internal::TestPropertyKeyIs(test_property.key()));
  if (property_with_matching_key == test_properties_.end()) {
    test_properties_.push_back(test_property);
    return;
  }
  property_with_matching_key->SetValue(test_property.value());
}

// Adds a failure if the key is a reserved attribute of Google Test
// testcase tags.  Returns true if the property is valid.
bool TestResult::ValidateTestProperty(const TestProperty& test_property) {
  internal::String key(test_property.key());
  if (key == "name" || key == "status" || key == "time" || key == "classname") {
    ADD_FAILURE()
        << "Reserved key used in RecordProperty(): "
        << key
        << " ('name', 'status', 'time', and 'classname' are reserved by "
        << GTEST_NAME_ << ")";
    return false;
  }
  return true;
}

// Clears the object.
void TestResult::Clear() {
  test_part_results_.clear();
  test_properties_.clear();
  death_test_count_ = 0;
  elapsed_time_ = 0;
}

// Returns true iff the test failed.
bool TestResult::Failed() const {
  for (int i = 0; i < total_part_count(); ++i) {
    if (GetTestPartResult(i).failed())
      return true;
  }
  return false;
}

// Returns true iff the test part fatally failed.
static bool TestPartFatallyFailed(const TestPartResult& result) {
  return result.fatally_failed();
}

// Returns true iff the test fatally failed.
bool TestResult::HasFatalFailure() const {
  return CountIf(test_part_results_, TestPartFatallyFailed) > 0;
}

// Returns true iff the test part non-fatally failed.
static bool TestPartNonfatallyFailed(const TestPartResult& result) {
  return result.nonfatally_failed();
}

// Returns true iff the test has a non-fatal failure.
bool TestResult::HasNonfatalFailure() const {
  return CountIf(test_part_results_, TestPartNonfatallyFailed) > 0;
}

// Gets the number of all test parts.  This is the sum of the number
// of successful test parts and the number of failed test parts.
int TestResult::total_part_count() const {
  return static_cast<int>(test_part_results_.size());
}

// Returns the number of the test properties.
int TestResult::test_property_count() const {
  return static_cast<int>(test_properties_.size());
}

// class Test

// Creates a Test object.

// The c'tor saves the values of all Google Test flags.
Test::Test()
    : gtest_flag_saver_(new internal::GTestFlagSaver) {
}

// The d'tor restores the values of all Google Test flags.
Test::~Test() {
  delete gtest_flag_saver_;
}

// Sets up the test fixture.
//
// A sub-class may override this.
void Test::SetUp() {
}

// Tears down the test fixture.
//
// A sub-class may override this.
void Test::TearDown() {
}

// Allows user supplied key value pairs to be recorded for later output.
void Test::RecordProperty(const char* key, const char* value) {
  UnitTest::GetInstance()->RecordPropertyForCurrentTest(key, value);
}

// Allows user supplied key value pairs to be recorded for later output.
void Test::RecordProperty(const char* key, int value) {
  Message value_message;
  value_message << value;
  RecordProperty(key, value_message.GetString().c_str());
}

namespace internal {

void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
                                    const String& message) {
  // This function is a friend of UnitTest and as such has access to
  // AddTestPartResult.
  UnitTest::GetInstance()->AddTestPartResult(
      result_type,
      NULL,  // No info about the source file where the exception occurred.
      -1,    // We have no info on which line caused the exception.
      message,
      String());  // No stack trace, either.
}

}  // namespace internal

// Google Test requires all tests in the same test case to use the same test
// fixture class.  This function checks if the current test has the
// same fixture class as the first test in the current test case.  If
// yes, it returns true; otherwise it generates a Google Test failure and
// returns false.
bool Test::HasSameFixtureClass() {
  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
  const TestCase* const test_case = impl->current_test_case();

  // Info about the first test in the current test case.
  const TestInfo* const first_test_info = test_case->test_info_list()[0];
  const internal::TypeId first_fixture_id = first_test_info->fixture_class_id_;
  const char* const first_test_name = first_test_info->name();

  // Info about the current test.
  const TestInfo* const this_test_info = impl->current_test_info();
  const internal::TypeId this_fixture_id = this_test_info->fixture_class_id_;
  const char* const this_test_name = this_test_info->name();

  if (this_fixture_id != first_fixture_id) {
    // Is the first test defined using TEST?
    const bool first_is_TEST = first_fixture_id == internal::GetTestTypeId();
    // Is this test defined using TEST?
    const bool this_is_TEST = this_fixture_id == internal::GetTestTypeId();

    if (first_is_TEST || this_is_TEST) {
      // The user mixed TEST and TEST_F in this test case - we'll tell
      // him/her how to fix it.

      // Gets the name of the TEST and the name of the TEST_F.  Note
      // that first_is_TEST and this_is_TEST cannot both be true, as
      // the fixture IDs are different for the two tests.
      const char* const TEST_name =
          first_is_TEST ? first_test_name : this_test_name;
      const char* const TEST_F_name =
          first_is_TEST ? this_test_name : first_test_name;

      ADD_FAILURE()
          << "All tests in the same test case must use the same test fixture\n"
          << "class, so mixing TEST_F and TEST in the same test case is\n"
          << "illegal.  In test case " << this_test_info->test_case_name()
          << ",\n"
          << "test " << TEST_F_name << " is defined using TEST_F but\n"
          << "test " << TEST_name << " is defined using TEST.  You probably\n"
          << "want to change the TEST to TEST_F or move it to another test\n"
          << "case.";
    } else {
      // The user defined two fixture classes with the same name in
      // two namespaces - we'll tell him/her how to fix it.
      ADD_FAILURE()
          << "All tests in the same test case must use the same test fixture\n"
          << "class.  However, in test case "
          << this_test_info->test_case_name() << ",\n"
          << "you defined test " << first_test_name
          << " and test " << this_test_name << "\n"
          << "using two different test fixture classes.  This can happen if\n"
          << "the two classes are from different namespaces or translation\n"
          << "units and have the same name.  You should probably rename one\n"
          << "of the classes to put the tests into different test cases.";
    }
    return false;
  }

  return true;
}

#if GTEST_HAS_SEH

// Adds an "exception thrown" fatal failure to the current test.  This
// function returns its result via an output parameter pointer because VC++
// prohibits creation of objects with destructors on stack in functions
// using __try (see error C2712).
static internal::String* FormatSehExceptionMessage(DWORD exception_code,
                                                   const char* location) {
  Message message;
  message << "SEH exception with code 0x" << std::setbase(16) <<
    exception_code << std::setbase(10) << " thrown in " << location << ".";

  return new internal::String(message.GetString());
}

#endif  // GTEST_HAS_SEH

#if GTEST_HAS_EXCEPTIONS

// Adds an "exception thrown" fatal failure to the current test.
static internal::String FormatCxxExceptionMessage(const char* description,
                                                  const char* location) {
  Message message;
  if (description != NULL) {
    message << "C++ exception with description \"" << description << "\"";
  } else {
    message << "Unknown C++ exception";
  }
  message << " thrown in " << location << ".";

  return message.GetString();
}

static internal::String PrintTestPartResultToString(
    const TestPartResult& test_part_result);

// A failed Google Test assertion will throw an exception of this type when
// GTEST_FLAG(throw_on_failure) is true (if exceptions are enabled).  We
// derive it from std::runtime_error, which is for errors presumably
// detectable only at run time.  Since std::runtime_error inherits from
// std::exception, many testing frameworks know how to extract and print the
// message inside it.
class GoogleTestFailureException : public ::std::runtime_error {
 public:
  explicit GoogleTestFailureException(const TestPartResult& failure)
      : ::std::runtime_error(PrintTestPartResultToString(failure).c_str()) {}
};
#endif  // GTEST_HAS_EXCEPTIONS

namespace internal {
// We put these helper functions in the internal namespace as IBM's xlC
// compiler rejects the code if they were declared static.

// Runs the given method and handles SEH exceptions it throws, when
// SEH is supported; returns the 0-value for type Result in case of an
// SEH exception.  (Microsoft compilers cannot handle SEH and C++
// exceptions in the same function.  Therefore, we provide a separate
// wrapper function for handling SEH exceptions.)
template <class T, typename Result>
Result HandleSehExceptionsInMethodIfSupported(
    T* object, Result (T::*method)(), const char* location) {
#if GTEST_HAS_SEH
  __try {
    return (object->*method)();
  } __except (internal::UnitTestOptions::GTestShouldProcessSEH(  // NOLINT
      GetExceptionCode())) {
    // We create the exception message on the heap because VC++ prohibits
    // creation of objects with destructors on stack in functions using __try
    // (see error C2712).
    internal::String* exception_message = FormatSehExceptionMessage(
        GetExceptionCode(), location);
    internal::ReportFailureInUnknownLocation(TestPartResult::kFatalFailure,
                                             *exception_message);
    delete exception_message;
    return static_cast<Result>(0);
  }
#else
  (void)location;
  return (object->*method)();
#endif  // GTEST_HAS_SEH
}

// Runs the given method and catches and reports C++ and/or SEH-style
// exceptions, if they are supported; returns the 0-value for type
// Result in case of an SEH exception.
template <class T, typename Result>
Result HandleExceptionsInMethodIfSupported(
    T* object, Result (T::*method)(), const char* location) {
  // NOTE: The user code can affect the way in which Google Test handles
  // exceptions by setting GTEST_FLAG(catch_exceptions), but only before
  // RUN_ALL_TESTS() starts. It is technically possible to check the flag
  // after the exception is caught and either report or re-throw the
  // exception based on the flag's value:
  //
  // try {
  //   // Perform the test method.
  // } catch (...) {
  //   if (GTEST_FLAG(catch_exceptions))
  //     // Report the exception as failure.
  //   else
  //     throw;  // Re-throws the original exception.
  // }
  //
  // However, the purpose of this flag is to allow the program to drop into
  // the debugger when the exception is thrown. On most platforms, once the
  // control enters the catch block, the exception origin information is
  // lost and the debugger will stop the program at the point of the
  // re-throw in this function -- instead of at the point of the original
  // throw statement in the code under test.  For this reason, we perform
  // the check early, sacrificing the ability to affect Google Test's
  // exception handling in the method where the exception is thrown.
  if (internal::GetUnitTestImpl()->catch_exceptions()) {
#if GTEST_HAS_EXCEPTIONS
    try {
      return HandleSehExceptionsInMethodIfSupported(object, method, location);
    } catch (const GoogleTestFailureException&) {  // NOLINT
      // This exception doesn't originate in code under test. It makes no
      // sense to report it as a test failure.
      throw;
    } catch (const std::exception& e) {  // NOLINT
      internal::ReportFailureInUnknownLocation(
          TestPartResult::kFatalFailure,
          FormatCxxExceptionMessage(e.what(), location));
    } catch (...) {  // NOLINT
      internal::ReportFailureInUnknownLocation(
          TestPartResult::kFatalFailure,
          FormatCxxExceptionMessage(NULL, location));
    }
    return static_cast<Result>(0);
#else
    return HandleSehExceptionsInMethodIfSupported(object, method, location);
#endif  // GTEST_HAS_EXCEPTIONS
  } else {
    return (object->*method)();
  }
}

}  // namespace internal

// Runs the test and updates the test result.
void Test::Run() {
  if (!HasSameFixtureClass()) return;

  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
  impl->os_stack_trace_getter()->UponLeavingGTest();
  internal::HandleExceptionsInMethodIfSupported(this, &Test::SetUp, "SetUp()");
  // We will run the test only if SetUp() was successful.
  if (!HasFatalFailure()) {
    impl->os_stack_trace_getter()->UponLeavingGTest();
    internal::HandleExceptionsInMethodIfSupported(
        this, &Test::TestBody, "the test body");
  }

  // However, we want to clean up as much as possible.  Hence we will
  // always call TearDown(), even if SetUp() or the test body has
  // failed.
  impl->os_stack_trace_getter()->UponLeavingGTest();
  internal::HandleExceptionsInMethodIfSupported(
      this, &Test::TearDown, "TearDown()");
}

// Returns true iff the current test has a fatal failure.
bool Test::HasFatalFailure() {
  return internal::GetUnitTestImpl()->current_test_result()->HasFatalFailure();
}

// Returns true iff the current test has a non-fatal failure.
bool Test::HasNonfatalFailure() {
  return internal::GetUnitTestImpl()->current_test_result()->
      HasNonfatalFailure();
}

// class TestInfo

// Constructs a TestInfo object. It assumes ownership of the test factory
// object.
// TODO(vladl@google.com): Make a_test_case_name and a_name const string&'s
// to signify they cannot be NULLs.
TestInfo::TestInfo(const char* a_test_case_name,
                   const char* a_name,
                   const char* a_type_param,
                   const char* a_value_param,
                   internal::TypeId fixture_class_id,
                   internal::TestFactoryBase* factory)
    : test_case_name_(a_test_case_name),
      name_(a_name),
      type_param_(a_type_param ? new std::string(a_type_param) : NULL),
      value_param_(a_value_param ? new std::string(a_value_param) : NULL),
      fixture_class_id_(fixture_class_id),
      should_run_(false),
      is_disabled_(false),
      matches_filter_(false),
      factory_(factory),
      result_() {}

// Destructs a TestInfo object.
TestInfo::~TestInfo() { delete factory_; }

namespace internal {

// Creates a new TestInfo object and registers it with Google Test;
// returns the created object.
//
// Arguments:
//
//   test_case_name:   name of the test case
//   name:             name of the test
//   type_param:       the name of the test's type parameter, or NULL if
//                     this is not a typed or a type-parameterized test.
//   value_param:      text representation of the test's value parameter,
//                     or NULL if this is not a value-parameterized test.
//   fixture_class_id: ID of the test fixture class
//   set_up_tc:        pointer to the function that sets up the test case
//   tear_down_tc:     pointer to the function that tears down the test case
//   factory:          pointer to the factory that creates a test object.
//                     The newly created TestInfo instance will assume
//                     ownership of the factory object.
TestInfo* MakeAndRegisterTestInfo(
    const char* test_case_name, const char* name,
    const char* type_param,
    const char* value_param,
    TypeId fixture_class_id,
    SetUpTestCaseFunc set_up_tc,
    TearDownTestCaseFunc tear_down_tc,
    TestFactoryBase* factory) {
  TestInfo* const test_info =
      new TestInfo(test_case_name, name, type_param, value_param,
                   fixture_class_id, factory);
  GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
  return test_info;
}

#if GTEST_HAS_PARAM_TEST
void ReportInvalidTestCaseType(const char* test_case_name,
                               const char* file, int line) {
  Message errors;
  errors
      << "Attempted redefinition of test case " << test_case_name << ".\n"
      << "All tests in the same test case must use the same test fixture\n"
      << "class.  However, in test case " << test_case_name << ", you tried\n"
      << "to define a test using a fixture class different from the one\n"
      << "used earlier. This can happen if the two fixture classes are\n"
      << "from different namespaces and have the same name. You should\n"
      << "probably rename one of the classes to put the tests into different\n"
      << "test cases.";

  fprintf(stderr, "%s %s", FormatFileLocation(file, line).c_str(),
          errors.GetString().c_str());
}
#endif  // GTEST_HAS_PARAM_TEST

}  // namespace internal

namespace {

// A predicate that checks the test name of a TestInfo against a known
// value.
//
// This is used for implementation of the TestCase class only.  We put
// it in the anonymous namespace to prevent polluting the outer
// namespace.
//
// TestNameIs is copyable.
class TestNameIs {
 public:
  // Constructor.
  //
  // TestNameIs has NO default constructor.
  explicit TestNameIs(const char* name)
      : name_(name) {}

  // Returns true iff the test name of test_info matches name_.
  bool operator()(const TestInfo * test_info) const {
    return test_info && internal::String(test_info->name()).Compare(name_) == 0;
  }

 private:
  internal::String name_;
};

}  // namespace

namespace internal {

// This method expands all parameterized tests registered with macros TEST_P
// and INSTANTIATE_TEST_CASE_P into regular tests and registers those.
// This will be done just once during the program runtime.
void UnitTestImpl::RegisterParameterizedTests() {
#if GTEST_HAS_PARAM_TEST
  if (!parameterized_tests_registered_) {
    parameterized_test_registry_.RegisterTests();
    parameterized_tests_registered_ = true;
  }
#endif
}

}  // namespace internal

// Creates the test object, runs it, records its result, and then
// deletes it.
void TestInfo::Run() {
  if (!should_run_) return;

  // Tells UnitTest where to store test result.
  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
  impl->set_current_test_info(this);

  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();

  // Notifies the unit test event listeners that a test is about to start.
  repeater->OnTestStart(*this);

  const TimeInMillis start = internal::GetTimeInMillis();

  impl->os_stack_trace_getter()->UponLeavingGTest();

  // Creates the test object.
  Test* const test = internal::HandleExceptionsInMethodIfSupported(
      factory_, &internal::TestFactoryBase::CreateTest,
      "the test fixture's constructor");

  // Runs the test only if the test object was created and its
  // constructor didn't generate a fatal failure.
  if ((test != NULL) && !Test::HasFatalFailure()) {
    // This doesn't throw as all user code that can throw are wrapped into
    // exception handling code.
    test->Run();
  }

  // Deletes the test object.
  impl->os_stack_trace_getter()->UponLeavingGTest();
  internal::HandleExceptionsInMethodIfSupported(
      test, &Test::DeleteSelf_, "the test fixture's destructor");

  result_.set_elapsed_time(internal::GetTimeInMillis() - start);

  // Notifies the unit test event listener that a test has just finished.
  repeater->OnTestEnd(*this);

  // Tells UnitTest to stop associating assertion results to this
  // test.
  impl->set_current_test_info(NULL);
}

// class TestCase

// Gets the number of successful tests in this test case.
int TestCase::successful_test_count() const {
  return CountIf(test_info_list_, TestPassed);
}

// Gets the number of failed tests in this test case.
int TestCase::failed_test_count() const {
  return CountIf(test_info_list_, TestFailed);
}

int TestCase::disabled_test_count() const {
  return CountIf(test_info_list_, TestDisabled);
}

// Get the number of tests in this test case that should run.
int TestCase::test_to_run_count() const {
  return CountIf(test_info_list_, ShouldRunTest);
}

// Gets the number of all tests.
int TestCase::total_test_count() const {
  return static_cast<int>(test_info_list_.size());
}

// Creates a TestCase with the given name.
//
// Arguments:
//
//   name:         name of the test case
//   a_type_param: the name of the test case's type parameter, or NULL if
//                 this is not a typed or a type-parameterized test case.
//   set_up_tc:    pointer to the function that sets up the test case
//   tear_down_tc: pointer to the function that tears down the test case
TestCase::TestCase(const char* a_name, const char* a_type_param,
                   Test::SetUpTestCaseFunc set_up_tc,
                   Test::TearDownTestCaseFunc tear_down_tc)
    : name_(a_name),
      type_param_(a_type_param ? new std::string(a_type_param) : NULL),
      set_up_tc_(set_up_tc),
      tear_down_tc_(tear_down_tc),
      should_run_(false),
      elapsed_time_(0) {
}

// Destructor of TestCase.
TestCase::~TestCase() {
  // Deletes every Test in the collection.
  ForEach(test_info_list_, internal::Delete<TestInfo>);
}

// Returns the i-th test among all the tests. i can range from 0 to
// total_test_count() - 1. If i is not in that range, returns NULL.
const TestInfo* TestCase::GetTestInfo(int i) const {
  const int index = GetElementOr(test_indices_, i, -1);
  return index < 0 ? NULL : test_info_list_[index];
}

// Returns the i-th test among all the tests. i can range from 0 to
// total_test_count() - 1. If i is not in that range, returns NULL.
TestInfo* TestCase::GetMutableTestInfo(int i) {
  const int index = GetElementOr(test_indices_, i, -1);
  return index < 0 ? NULL : test_info_list_[index];
}

// Adds a test to this test case.  Will delete the test upon
// destruction of the TestCase object.
void TestCase::AddTestInfo(TestInfo * test_info) {
  test_info_list_.push_back(test_info);
  test_indices_.push_back(static_cast<int>(test_indices_.size()));
}

// Runs every test in this TestCase.
void TestCase::Run() {
  if (!should_run_) return;

  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
  impl->set_current_test_case(this);

  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();

  repeater->OnTestCaseStart(*this);
  impl->os_stack_trace_getter()->UponLeavingGTest();
  internal::HandleExceptionsInMethodIfSupported(
      this, &TestCase::RunSetUpTestCase, "SetUpTestCase()");

  const internal::TimeInMillis start = internal::GetTimeInMillis();
  for (int i = 0; i < total_test_count(); i++) {
    GetMutableTestInfo(i)->Run();
  }
  elapsed_time_ = internal::GetTimeInMillis() - start;

  impl->os_stack_trace_getter()->UponLeavingGTest();
  internal::HandleExceptionsInMethodIfSupported(
      this, &TestCase::RunTearDownTestCase, "TearDownTestCase()");

  repeater->OnTestCaseEnd(*this);
  impl->set_current_test_case(NULL);
}

// Clears the results of all tests in this test case.
void TestCase::ClearResult() {
  ForEach(test_info_list_, TestInfo::ClearTestResult);
}

// Shuffles the tests in this test case.
void TestCase::ShuffleTests(internal::Random* random) {
  Shuffle(random, &test_indices_);
}

// Restores the test order to before the first shuffle.
void TestCase::UnshuffleTests() {
  for (size_t i = 0; i < test_indices_.size(); i++) {
    test_indices_[i] = static_cast<int>(i);
  }
}

// Formats a countable noun.  Depending on its quantity, either the
// singular form or the plural form is used. e.g.
//
// FormatCountableNoun(1, "formula", "formuli") returns "1 formula".
// FormatCountableNoun(5, "book", "books") returns "5 books".
static internal::String FormatCountableNoun(int count,
                                            const char * singular_form,
                                            const char * plural_form) {
  return internal::String::Format("%d %s", count,
                                  count == 1 ? singular_form : plural_form);
}

// Formats the count of tests.
static internal::String FormatTestCount(int test_count) {
  return FormatCountableNoun(test_count, "test", "tests");
}

// Formats the count of test cases.
static internal::String FormatTestCaseCount(int test_case_count) {
  return FormatCountableNoun(test_case_count, "test case", "test cases");
}

// Converts a TestPartResult::Type enum to human-friendly string
// representation.  Both kNonFatalFailure and kFatalFailure are translated
// to "Failure", as the user usually doesn't care about the difference
// between the two when viewing the test result.
static const char * TestPartResultTypeToString(TestPartResult::Type type) {
  switch (type) {
    case TestPartResult::kSuccess:
      return "Success";

    case TestPartResult::kNonFatalFailure:
    case TestPartResult::kFatalFailure:
#ifdef _MSC_VER
      return "error: ";
#else
      return "Failure\n";
#endif
    default:
      return "Unknown result type";
  }
}

// Prints a TestPartResult to a String.
static internal::String PrintTestPartResultToString(
    const TestPartResult& test_part_result) {
  return (Message()
          << internal::FormatFileLocation(test_part_result.file_name(),
                                          test_part_result.line_number())
          << " " << TestPartResultTypeToString(test_part_result.type())
          << test_part_result.message()).GetString();
}

// Prints a TestPartResult.
static void PrintTestPartResult(const TestPartResult& test_part_result) {
  const internal::String& result =
      PrintTestPartResultToString(test_part_result);
  printf("%s\n", result.c_str());
  fflush(stdout);
  // If the test program runs in Visual Studio or a debugger, the
  // following statements add the test part result message to the Output
  // window such that the user can double-click on it to jump to the
  // corresponding source code location; otherwise they do nothing.
#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
  // We don't call OutputDebugString*() on Windows Mobile, as printing
  // to stdout is done by OutputDebugString() there already - we don't
  // want the same message printed twice.
  ::OutputDebugStringA(result.c_str());
  ::OutputDebugStringA("\n");
#endif
}

// class PrettyUnitTestResultPrinter

namespace internal {

enum GTestColor {
  COLOR_DEFAULT,
  COLOR_RED,
  COLOR_GREEN,
  COLOR_YELLOW
};

#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE

// Returns the character attribute for the given color.
WORD GetColorAttribute(GTestColor color) {
  switch (color) {
    case COLOR_RED:    return FOREGROUND_RED;
    case COLOR_GREEN:  return FOREGROUND_GREEN;
    case COLOR_YELLOW: return FOREGROUND_RED | FOREGROUND_GREEN;
    default:           return 0;
  }
}

#else

// Returns the ANSI color code for the given color.  COLOR_DEFAULT is
// an invalid input.
const char* GetAnsiColorCode(GTestColor color) {
  switch (color) {
    case COLOR_RED:     return "1";
    case COLOR_GREEN:   return "2";
    case COLOR_YELLOW:  return "3";
    default:            return NULL;
  };
}

#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE

// Returns true iff Google Test should use colors in the output.
bool ShouldUseColor(bool stdout_is_tty) {
  const char* const gtest_color = GTEST_FLAG(color).c_str();

  if (String::CaseInsensitiveCStringEquals(gtest_color, "auto")) {
#if GTEST_OS_WINDOWS
    // On Windows the TERM variable is usually not set, but the
    // console there does support colors.
    return stdout_is_tty;
#else
    // On non-Windows platforms, we rely on the TERM variable.
    const char* const term = posix::GetEnv("TERM");
    const bool term_supports_color =
        String::CStringEquals(term, "xterm") ||
        String::CStringEquals(term, "xterm-color") ||
        String::CStringEquals(term, "xterm-256color") ||
        String::CStringEquals(term, "screen") ||
        String::CStringEquals(term, "linux") ||
        String::CStringEquals(term, "cygwin");
    return stdout_is_tty && term_supports_color;
#endif  // GTEST_OS_WINDOWS
  }

  return String::CaseInsensitiveCStringEquals(gtest_color, "yes") ||
      String::CaseInsensitiveCStringEquals(gtest_color, "true") ||
      String::CaseInsensitiveCStringEquals(gtest_color, "t") ||
      String::CStringEquals(gtest_color, "1");
  // We take "yes", "true", "t", and "1" as meaning "yes".  If the
  // value is neither one of these nor "auto", we treat it as "no" to
  // be conservative.
}

// Helpers for printing colored strings to stdout. Note that on Windows, we
// cannot simply emit special characters and have the terminal change colors.
// This routine must actually emit the characters rather than return a string
// that would be colored when printed, as can be done on Linux.
void ColoredPrintf(GTestColor color, const char* fmt, ...) {
  va_list args;
  va_start(args, fmt);

#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_SYMBIAN || GTEST_OS_ZOS
  const bool use_color = false;
#else
  static const bool in_color_mode =
      ShouldUseColor(posix::IsATTY(posix::FileNo(stdout)) != 0);
  const bool use_color = in_color_mode && (color != COLOR_DEFAULT);
#endif  // GTEST_OS_WINDOWS_MOBILE || GTEST_OS_SYMBIAN || GTEST_OS_ZOS
  // The '!= 0' comparison is necessary to satisfy MSVC 7.1.

  if (!use_color) {
    vprintf(fmt, args);
    va_end(args);
    return;
  }

#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);

  // Gets the current text color.
  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
  const WORD old_color_attrs = buffer_info.wAttributes;

  // We need to flush the stream buffers into the console before each
  // SetConsoleTextAttribute call lest it affect the text that is already
  // printed but has not yet reached the console.
  fflush(stdout);
  SetConsoleTextAttribute(stdout_handle,
                          GetColorAttribute(color) | FOREGROUND_INTENSITY);
  vprintf(fmt, args);

  fflush(stdout);
  // Restores the text color.
  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
#else
  printf("\033[0;3%sm", GetAnsiColorCode(color));
  vprintf(fmt, args);
  printf("\033[m");  // Resets the terminal to default.
#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
  va_end(args);
}

void PrintFullTestCommentIfPresent(const TestInfo& test_info) {
  const char* const type_param = test_info.type_param();
  const char* const value_param = test_info.value_param();

  if (type_param != NULL || value_param != NULL) {
    printf(", where ");
    if (type_param != NULL) {
      printf("TypeParam = %s", type_param);
      if (value_param != NULL)
        printf(" and ");
    }
    if (value_param != NULL) {
      printf("GetParam() = %s", value_param);
    }
  }
}

// This class implements the TestEventListener interface.
//
// Class PrettyUnitTestResultPrinter is copyable.
class PrettyUnitTestResultPrinter : public TestEventListener {
 public:
  PrettyUnitTestResultPrinter() {}
  static void PrintTestName(const char * test_case, const char * test) {
    printf("%s.%s", test_case, test);
  }

  // The following methods override what's in the TestEventListener class.
  virtual void OnTestProgramStart(const UnitTest& /*unit_test*/) {}
  virtual void OnTestIterationStart(const UnitTest& unit_test, int iteration);
  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test);
  virtual void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) {}
  virtual void OnTestCaseStart(const TestCase& test_case);
  virtual void OnTestStart(const TestInfo& test_info);
  virtual void OnTestPartResult(const TestPartResult& result);
  virtual void OnTestEnd(const TestInfo& test_info);
  virtual void OnTestCaseEnd(const TestCase& test_case);
  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test);
  virtual void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) {}
  virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);
  virtual void OnTestProgramEnd(const UnitTest& /*unit_test*/) {}

 private:
  static void PrintFailedTests(const UnitTest& unit_test);

  internal::String test_case_name_;
};

  // Fired before each iteration of tests starts.
void PrettyUnitTestResultPrinter::OnTestIterationStart(
    const UnitTest& unit_test, int iteration) {
  if (GTEST_FLAG(repeat) != 1)
    printf("\nRepeating all tests (iteration %d) . . .\n\n", iteration + 1);

  const char* const filter = GTEST_FLAG(filter).c_str();

  // Prints the filter if it's not *.  This reminds the user that some
  // tests may be skipped.
  if (!internal::String::CStringEquals(filter, kUniversalFilter)) {
    ColoredPrintf(COLOR_YELLOW,
                  "Note: %s filter = %s\n", GTEST_NAME_, filter);
  }

  if (internal::ShouldShard(kTestTotalShards, kTestShardIndex, false)) {
    const Int32 shard_index = Int32FromEnvOrDie(kTestShardIndex, -1);
    ColoredPrintf(COLOR_YELLOW,
                  "Note: This is test shard %d of %s.\n",
                  static_cast<int>(shard_index) + 1,
                  internal::posix::GetEnv(kTestTotalShards));
  }

  if (GTEST_FLAG(shuffle)) {
    ColoredPrintf(COLOR_YELLOW,
                  "Note: Randomizing tests' orders with a seed of %d .\n",
                  unit_test.random_seed());
  }

  ColoredPrintf(COLOR_GREEN,  "[==========] ");
  printf("Running %s from %s.\n",
         FormatTestCount(unit_test.test_to_run_count()).c_str(),
         FormatTestCaseCount(unit_test.test_case_to_run_count()).c_str());
  fflush(stdout);
}

void PrettyUnitTestResultPrinter::OnEnvironmentsSetUpStart(
    const UnitTest& /*unit_test*/) {
  ColoredPrintf(COLOR_GREEN,  "[----------] ");
  printf("Global test environment set-up.\n");
  fflush(stdout);
}

void PrettyUnitTestResultPrinter::OnTestCaseStart(const TestCase& test_case) {
  test_case_name_ = test_case.name();
  const internal::String counts =
      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
  ColoredPrintf(COLOR_GREEN, "[----------] ");
  printf("%s from %s", counts.c_str(), test_case_name_.c_str());
  if (test_case.type_param() == NULL) {
    printf("\n");
  } else {
    printf(", where TypeParam = %s\n", test_case.type_param());
  }
  fflush(stdout);
}

void PrettyUnitTestResultPrinter::OnTestStart(const TestInfo& test_info) {
  ColoredPrintf(COLOR_GREEN,  "[ RUN      ] ");
  PrintTestName(test_case_name_.c_str(), test_info.name());
  printf("\n");
  fflush(stdout);
}

// Called after an assertion failure.
void PrettyUnitTestResultPrinter::OnTestPartResult(
    const TestPartResult& result) {
  // If the test part succeeded, we don't need to do anything.
  if (result.type() == TestPartResult::kSuccess)
    return;

  // Print failure message from the assertion (e.g. expected this and got that).
  PrintTestPartResult(result);
  fflush(stdout);
}

void PrettyUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
  if (test_info.result()->Passed()) {
    ColoredPrintf(COLOR_GREEN, "[       OK ] ");
  } else {
    ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
  }
  PrintTestName(test_case_name_.c_str(), test_info.name());
  if (test_info.result()->Failed())
    PrintFullTestCommentIfPresent(test_info);

  if (GTEST_FLAG(print_time)) {
    printf(" (%s ms)\n", internal::StreamableToString(
           test_info.result()->elapsed_time()).c_str());
  } else {
    printf("\n");
  }
  fflush(stdout);
}

void PrettyUnitTestResultPrinter::OnTestCaseEnd(const TestCase& test_case) {
  if (!GTEST_FLAG(print_time)) return;

  test_case_name_ = test_case.name();
  const internal::String counts =
      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
  ColoredPrintf(COLOR_GREEN, "[----------] ");
  printf("%s from %s (%s ms total)\n\n",
         counts.c_str(), test_case_name_.c_str(),
         internal::StreamableToString(test_case.elapsed_time()).c_str());
  fflush(stdout);
}

void PrettyUnitTestResultPrinter::OnEnvironmentsTearDownStart(
    const UnitTest& /*unit_test*/) {
  ColoredPrintf(COLOR_GREEN,  "[----------] ");
  printf("Global test environment tear-down\n");
  fflush(stdout);
}

// Internal helper for printing the list of failed tests.
void PrettyUnitTestResultPrinter::PrintFailedTests(const UnitTest& unit_test) {
  const int failed_test_count = unit_test.failed_test_count();
  if (failed_test_count == 0) {
    return;
  }

  for (int i = 0; i < unit_test.total_test_case_count(); ++i) {
    const TestCase& test_case = *unit_test.GetTestCase(i);
    if (!test_case.should_run() || (test_case.failed_test_count() == 0)) {
      continue;
    }
    for (int j = 0; j < test_case.total_test_count(); ++j) {
      const TestInfo& test_info = *test_case.GetTestInfo(j);
      if (!test_info.should_run() || test_info.result()->Passed()) {
        continue;
      }
      ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
      printf("%s.%s", test_case.name(), test_info.name());
      PrintFullTestCommentIfPresent(test_info);
      printf("\n");
    }
  }
}

void PrettyUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
                                                     int /*iteration*/) {
  ColoredPrintf(COLOR_GREEN,  "[==========] ");
  printf("%s from %s ran.",
         FormatTestCount(unit_test.test_to_run_count()).c_str(),
         FormatTestCaseCount(unit_test.test_case_to_run_count()).c_str());
  if (GTEST_FLAG(print_time)) {
    printf(" (%s ms total)",
           internal::StreamableToString(unit_test.elapsed_time()).c_str());
  }
  printf("\n");
  ColoredPrintf(COLOR_GREEN,  "[  PASSED  ] ");
  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());

  int num_failures = unit_test.failed_test_count();
  if (!unit_test.Passed()) {
    const int failed_test_count = unit_test.failed_test_count();
    ColoredPrintf(COLOR_RED,  "[  FAILED  ] ");
    printf("%s, listed below:\n", FormatTestCount(failed_test_count).c_str());
    PrintFailedTests(unit_test);
    printf("\n%2d FAILED %s\n", num_failures,
                        num_failures == 1 ? "TEST" : "TESTS");
  }

  int num_disabled = unit_test.disabled_test_count();
  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
    if (!num_failures) {
      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
    }
    ColoredPrintf(COLOR_YELLOW,
                  "  YOU HAVE %d DISABLED %s\n\n",
                  num_disabled,
                  num_disabled == 1 ? "TEST" : "TESTS");
  }
  // Ensure that Google Test output is printed before, e.g., heapchecker output.
  fflush(stdout);
}

// End PrettyUnitTestResultPrinter

// class TestEventRepeater
//
// This class forwards events to other event listeners.
class TestEventRepeater : public TestEventListener {
 public:
  TestEventRepeater() : forwarding_enabled_(true) {}
  virtual ~TestEventRepeater();
  void Append(TestEventListener *listener);
  TestEventListener* Release(TestEventListener* listener);

  // Controls whether events will be forwarded to listeners_. Set to false
  // in death test child processes.
  bool forwarding_enabled() const { return forwarding_enabled_; }
  void set_forwarding_enabled(bool enable) { forwarding_enabled_ = enable; }

  virtual void OnTestProgramStart(const UnitTest& unit_test);
  virtual void OnTestIterationStart(const UnitTest& unit_test, int iteration);
  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test);
  virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test);
  virtual void OnTestCaseStart(const TestCase& test_case);
  virtual void OnTestStart(const TestInfo& test_info);
  virtual void OnTestPartResult(const TestPartResult& result);
  virtual void OnTestEnd(const TestInfo& test_info);
  virtual void OnTestCaseEnd(const TestCase& test_case);
  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test);
  virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test);
  virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);
  virtual void OnTestProgramEnd(const UnitTest& unit_test);

 private:
  // Controls whether events will be forwarded to listeners_. Set to false
  // in death test child processes.
  bool forwarding_enabled_;
  // The list of listeners that receive events.
  std::vector<TestEventListener*> listeners_;

  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventRepeater);
};

TestEventRepeater::~TestEventRepeater() {
  ForEach(listeners_, Delete<TestEventListener>);
}

void TestEventRepeater::Append(TestEventListener *listener) {
  listeners_.push_back(listener);
}

// TODO(vladl@google.com): Factor the search functionality into Vector::Find.
TestEventListener* TestEventRepeater::Release(TestEventListener *listener) {
  for (size_t i = 0; i < listeners_.size(); ++i) {
    if (listeners_[i] == listener) {
      listeners_.erase(listeners_.begin() + i);
      return listener;
    }
  }

  return NULL;
}

// Since most methods are very similar, use macros to reduce boilerplate.
// This defines a member that forwards the call to all listeners.
#define GTEST_REPEATER_METHOD_(Name, Type) \
void TestEventRepeater::Name(const Type& parameter) { \
  if (forwarding_enabled_) { \
    for (size_t i = 0; i < listeners_.size(); i++) { \
      listeners_[i]->Name(parameter); \
    } \
  } \
}
// This defines a member that forwards the call to all listeners in reverse
// order.
#define GTEST_REVERSE_REPEATER_METHOD_(Name, Type) \
void TestEventRepeater::Name(const Type& parameter) { \
  if (forwarding_enabled_) { \
    for (int i = static_cast<int>(listeners_.size()) - 1; i >= 0; i--) { \
      listeners_[i]->Name(parameter); \
    } \
  } \
}

GTEST_REPEATER_METHOD_(OnTestProgramStart, UnitTest)
GTEST_REPEATER_METHOD_(OnEnvironmentsSetUpStart, UnitTest)
GTEST_REPEATER_METHOD_(OnTestCaseStart, TestCase)
GTEST_REPEATER_METHOD_(OnTestStart, TestInfo)
GTEST_REPEATER_METHOD_(OnTestPartResult, TestPartResult)
GTEST_REPEATER_METHOD_(OnEnvironmentsTearDownStart, UnitTest)
GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsSetUpEnd, UnitTest)
GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsTearDownEnd, UnitTest)
GTEST_REVERSE_REPEATER_METHOD_(OnTestEnd, TestInfo)
GTEST_REVERSE_REPEATER_METHOD_(OnTestCaseEnd, TestCase)
GTEST_REVERSE_REPEATER_METHOD_(OnTestProgramEnd, UnitTest)

#undef GTEST_REPEATER_METHOD_
#undef GTEST_REVERSE_REPEATER_METHOD_

void TestEventRepeater::OnTestIterationStart(const UnitTest& unit_test,
                                             int iteration) {
  if (forwarding_enabled_) {
    for (size_t i = 0; i < listeners_.size(); i++) {
      listeners_[i]->OnTestIterationStart(unit_test, iteration);
    }
  }
}

void TestEventRepeater::OnTestIterationEnd(const UnitTest& unit_test,
                                           int iteration) {
  if (forwarding_enabled_) {
    for (int i = static_cast<int>(listeners_.size()) - 1; i >= 0; i--) {
      listeners_[i]->OnTestIterationEnd(unit_test, iteration);
    }
  }
}

// End TestEventRepeater

// This class generates an XML output file.
class XmlUnitTestResultPrinter : public EmptyTestEventListener {
 public:
  explicit XmlUnitTestResultPrinter(const char* output_file);

  virtual void OnTestIterationEnd(const UnitTest& unit_test, int iteration);

 private:
  // Is c a whitespace character that is normalized to a space character
  // when it appears in an XML attribute value?
  static bool IsNormalizableWhitespace(char c) {
    return c == 0x9 || c == 0xA || c == 0xD;
  }

  // May c appear in a well-formed XML document?
  static bool IsValidXmlCharacter(char c) {
    return IsNormalizableWhitespace(c) || c >= 0x20;
  }

  // Returns an XML-escaped copy of the input string str.  If
  // is_attribute is true, the text is meant to appear as an attribute
  // value, and normalizable whitespace is preserved by replacing it
  // with character references.
  static String EscapeXml(const char* str, bool is_attribute);

  // Returns the given string with all characters invalid in XML removed.
  static string RemoveInvalidXmlCharacters(const string& str);

  // Convenience wrapper around EscapeXml when str is an attribute value.
  static String EscapeXmlAttribute(const char* str) {
    return EscapeXml(str, true);
  }

  // Convenience wrapper around EscapeXml when str is not an attribute value.
  static String EscapeXmlText(const char* str) { return EscapeXml(str, false); }

  // Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
  static void OutputXmlCDataSection(::std::ostream* stream, const char* data);

  // Streams an XML representation of a TestInfo object.
  static void OutputXmlTestInfo(::std::ostream* stream,
                                const char* test_case_name,
                                const TestInfo& test_info);

  // Prints an XML representation of a TestCase object
  static void PrintXmlTestCase(FILE* out, const TestCase& test_case);

  // Prints an XML summary of unit_test to output stream out.
  static void PrintXmlUnitTest(FILE* out, const UnitTest& unit_test);

  // Produces a string representing the test properties in a result as space
  // delimited XML attributes based on the property key="value" pairs.
  // When the String is not empty, it includes a space at the beginning,
  // to delimit this attribute from prior attributes.
  static String TestPropertiesAsXmlAttributes(const TestResult& result);

  // The output file.
  const String output_file_;

  GTEST_DISALLOW_COPY_AND_ASSIGN_(XmlUnitTestResultPrinter);
};

// Creates a new XmlUnitTestResultPrinter.
XmlUnitTestResultPrinter::XmlUnitTestResultPrinter(const char* output_file)
    : output_file_(output_file) {
  if (output_file_.c_str() == NULL || output_file_.empty()) {
    fprintf(stderr, "XML output file may not be null\n");
    fflush(stderr);
    exit(EXIT_FAILURE);
  }
}

// Called after the unit test ends.
void XmlUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
                                                  int /*iteration*/) {
  FILE* xmlout = NULL;
  FilePath output_file(output_file_);
  FilePath output_dir(output_file.RemoveFileName());

  if (output_dir.CreateDirectoriesRecursively()) {
    xmlout = posix::FOpen(output_file_.c_str(), "w");
  }
  if (xmlout == NULL) {
    // TODO(wan): report the reason of the failure.
    //
    // We don't do it for now as:
    //
    //   1. There is no urgent need for it.
    //   2. It's a bit involved to make the errno variable thread-safe on
    //      all three operating systems (Linux, Windows, and Mac OS).
    //   3. To interpret the meaning of errno in a thread-safe way,
    //      we need the strerror_r() function, which is not available on
    //      Windows.
    fprintf(stderr,
            "Unable to open file \"%s\"\n",
            output_file_.c_str());
    fflush(stderr);
    exit(EXIT_FAILURE);
  }
  PrintXmlUnitTest(xmlout, unit_test);
  fclose(xmlout);
}

// Returns an XML-escaped copy of the input string str.  If is_attribute
// is true, the text is meant to appear as an attribute value, and
// normalizable whitespace is preserved by replacing it with character
// references.
//
// Invalid XML characters in str, if any, are stripped from the output.
// It is expected that most, if not all, of the text processed by this
// module will consist of ordinary English text.
// If this module is ever modified to produce version 1.1 XML output,
// most invalid characters can be retained using character references.
// TODO(wan): It might be nice to have a minimally invasive, human-readable
// escaping scheme for invalid characters, rather than dropping them.
String XmlUnitTestResultPrinter::EscapeXml(const char* str, bool is_attribute) {
  Message m;

  if (str != NULL) {
    for (const char* src = str; *src; ++src) {
      switch (*src) {
        case '<':
          m << "&lt;";
          break;
        case '>':
          m << "&gt;";
          break;
        case '&':
          m << "&amp;";
          break;
        case '\'':
          if (is_attribute)
            m << "&apos;";
          else
            m << '\'';
          break;
        case '"':
          if (is_attribute)
            m << "&quot;";
          else
            m << '"';
          break;
        default:
          if (IsValidXmlCharacter(*src)) {
            if (is_attribute && IsNormalizableWhitespace(*src))
              m << String::Format("&#x%02X;", unsigned(*src));
            else
              m << *src;
          }
          break;
      }
    }
  }

  return m.GetString();
}

// Returns the given string with all characters invalid in XML removed.
// Currently invalid characters are dropped from the string. An
// alternative is to replace them with certain characters such as . or ?.
string XmlUnitTestResultPrinter::RemoveInvalidXmlCharacters(const string& str) {
  string output;
  output.reserve(str.size());
  for (string::const_iterator it = str.begin(); it != str.end(); ++it)
    if (IsValidXmlCharacter(*it))
      output.push_back(*it);

  return output;
}

// The following routines generate an XML representation of a UnitTest
// object.
//
// This is how Google Test concepts map to the DTD:
//
// <testsuites name="AllTests">        <-- corresponds to a UnitTest object
//   <testsuite name="testcase-name">  <-- corresponds to a TestCase object
//     <testcase name="test-name">     <-- corresponds to a TestInfo object
//       <failure message="...">...</failure>
//       <failure message="...">...</failure>
//       <failure message="...">...</failure>
//                                     <-- individual assertion failures
//     </testcase>
//   </testsuite>
// </testsuites>

// Formats the given time in milliseconds as seconds.
std::string FormatTimeInMillisAsSeconds(TimeInMillis ms) {
  ::std::stringstream ss;
  ss << ms/1000.0;
  return ss.str();
}

// Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
void XmlUnitTestResultPrinter::OutputXmlCDataSection(::std::ostream* stream,
                                                     const char* data) {
  const char* segment = data;
  *stream << "<![CDATA[";
  for (;;) {
    const char* const next_segment = strstr(segment, "]]>");
    if (next_segment != NULL) {
      stream->write(
          segment, static_cast<std::streamsize>(next_segment - segment));
      *stream << "]]>]]&gt;<![CDATA[";
      segment = next_segment + strlen("]]>");
    } else {
      *stream << segment;
      break;
    }
  }
  *stream << "]]>";
}

// Prints an XML representation of a TestInfo object.
// TODO(wan): There is also value in printing properties with the plain printer.
void XmlUnitTestResultPrinter::OutputXmlTestInfo(::std::ostream* stream,
                                                 const char* test_case_name,
                                                 const TestInfo& test_info) {
  const TestResult& result = *test_info.result();
  *stream << "    <testcase name=\""
          << EscapeXmlAttribute(test_info.name()).c_str() << "\"";

  if (test_info.value_param() != NULL) {
    *stream << " value_param=\"" << EscapeXmlAttribute(test_info.value_param())
            << "\"";
  }
  if (test_info.type_param() != NULL) {
    *stream << " type_param=\"" << EscapeXmlAttribute(test_info.type_param())
            << "\"";
  }

  *stream << " status=\""
          << (test_info.should_run() ? "run" : "notrun")
          << "\" time=\""
          << FormatTimeInMillisAsSeconds(result.elapsed_time())
          << "\" classname=\"" << EscapeXmlAttribute(test_case_name).c_str()
          << "\"" << TestPropertiesAsXmlAttributes(result).c_str();

  int failures = 0;
  for (int i = 0; i < result.total_part_count(); ++i) {
    const TestPartResult& part = result.GetTestPartResult(i);
    if (part.failed()) {
      if (++failures == 1)
        *stream << ">\n";
      *stream << "      <failure message=\""
              << EscapeXmlAttribute(part.summary()).c_str()
              << "\" type=\"\">";
      const string location = internal::FormatCompilerIndependentFileLocation(
          part.file_name(), part.line_number());
      const string message = location + "\n" + part.message();
      OutputXmlCDataSection(stream,
                            RemoveInvalidXmlCharacters(message).c_str());
      *stream << "</failure>\n";
    }
  }

  if (failures == 0)
    *stream << " />\n";
  else
    *stream << "    </testcase>\n";
}

// Prints an XML representation of a TestCase object
void XmlUnitTestResultPrinter::PrintXmlTestCase(FILE* out,
                                                const TestCase& test_case) {
  fprintf(out,
          "  <testsuite name=\"%s\" tests=\"%d\" failures=\"%d\" "
          "disabled=\"%d\" ",
          EscapeXmlAttribute(test_case.name()).c_str(),
          test_case.total_test_count(),
          test_case.failed_test_count(),
          test_case.disabled_test_count());
  fprintf(out,
          "errors=\"0\" time=\"%s\">\n",
          FormatTimeInMillisAsSeconds(test_case.elapsed_time()).c_str());
  for (int i = 0; i < test_case.total_test_count(); ++i) {
    ::std::stringstream stream;
    OutputXmlTestInfo(&stream, test_case.name(), *test_case.GetTestInfo(i));
    fprintf(out, "%s", StringStreamToString(&stream).c_str());
  }
  fprintf(out, "  </testsuite>\n");
}

// Prints an XML summary of unit_test to output stream out.
void XmlUnitTestResultPrinter::PrintXmlUnitTest(FILE* out,
                                                const UnitTest& unit_test) {
  fprintf(out, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
  fprintf(out,
          "<testsuites tests=\"%d\" failures=\"%d\" disabled=\"%d\" "
          "errors=\"0\" time=\"%s\" ",
          unit_test.total_test_count(),
          unit_test.failed_test_count(),
          unit_test.disabled_test_count(),
          FormatTimeInMillisAsSeconds(unit_test.elapsed_time()).c_str());
  if (GTEST_FLAG(shuffle)) {
    fprintf(out, "random_seed=\"%d\" ", unit_test.random_seed());
  }
  fprintf(out, "name=\"AllTests\">\n");
  for (int i = 0; i < unit_test.total_test_case_count(); ++i)
    PrintXmlTestCase(out, *unit_test.GetTestCase(i));
  fprintf(out, "</testsuites>\n");
}

// Produces a string representing the test properties in a result as space
// delimited XML attributes based on the property key="value" pairs.
String XmlUnitTestResultPrinter::TestPropertiesAsXmlAttributes(
    const TestResult& result) {
  Message attributes;
  for (int i = 0; i < result.test_property_count(); ++i) {
    const TestProperty& property = result.GetTestProperty(i);
    attributes << " " << property.key() << "="
        << "\"" << EscapeXmlAttribute(property.value()) << "\"";
  }
  return attributes.GetString();
}

// End XmlUnitTestResultPrinter

#if GTEST_CAN_STREAM_RESULTS_

// Streams test results to the given port on the given host machine.
class StreamingListener : public EmptyTestEventListener {
 public:
  // Escapes '=', '&', '%', and '\n' characters in str as "%xx".
  static string UrlEncode(const char* str);

  StreamingListener(const string& host, const string& port)
      : sockfd_(-1), host_name_(host), port_num_(port) {
    MakeConnection();
    Send("gtest_streaming_protocol_version=1.0\n");
  }

  virtual ~StreamingListener() {
    if (sockfd_ != -1)
      CloseConnection();
  }

  void OnTestProgramStart(const UnitTest& /* unit_test */) {
    Send("event=TestProgramStart\n");
  }

  void OnTestProgramEnd(const UnitTest& unit_test) {
    // Note that Google Test current only report elapsed time for each
    // test iteration, not for the entire test program.
    Send(String::Format("event=TestProgramEnd&passed=%d\n",
                        unit_test.Passed()));

    // Notify the streaming server to stop.
    CloseConnection();
  }

  void OnTestIterationStart(const UnitTest& /* unit_test */, int iteration) {
    Send(String::Format("event=TestIterationStart&iteration=%d\n",
                        iteration));
  }

  void OnTestIterationEnd(const UnitTest& unit_test, int /* iteration */) {
    Send(String::Format("event=TestIterationEnd&passed=%d&elapsed_time=%sms\n",
                        unit_test.Passed(),
                        StreamableToString(unit_test.elapsed_time()).c_str()));
  }

  void OnTestCaseStart(const TestCase& test_case) {
    Send(String::Format("event=TestCaseStart&name=%s\n", test_case.name()));
  }

  void OnTestCaseEnd(const TestCase& test_case) {
    Send(String::Format("event=TestCaseEnd&passed=%d&elapsed_time=%sms\n",
                        test_case.Passed(),
                        StreamableToString(test_case.elapsed_time()).c_str()));
  }

  void OnTestStart(const TestInfo& test_info) {
    Send(String::Format("event=TestStart&name=%s\n", test_info.name()));
  }

  void OnTestEnd(const TestInfo& test_info) {
    Send(String::Format(
        "event=TestEnd&passed=%d&elapsed_time=%sms\n",
        (test_info.result())->Passed(),
        StreamableToString((test_info.result())->elapsed_time()).c_str()));
  }

  void OnTestPartResult(const TestPartResult& test_part_result) {
    const char* file_name = test_part_result.file_name();
    if (file_name == NULL)
      file_name = "";
    Send(String::Format("event=TestPartResult&file=%s&line=%d&message=",
                        UrlEncode(file_name).c_str(),
                        test_part_result.line_number()));
    Send(UrlEncode(test_part_result.message()) + "\n");
  }

 private:
  // Creates a client socket and connects to the server.
  void MakeConnection();

  // Closes the socket.
  void CloseConnection() {
    GTEST_CHECK_(sockfd_ != -1)
        << "CloseConnection() can be called only when there is a connection.";

    close(sockfd_);
    sockfd_ = -1;
  }

  // Sends a string to the socket.
  void Send(const string& message) {
    GTEST_CHECK_(sockfd_ != -1)
        << "Send() can be called only when there is a connection.";

    const int len = static_cast<int>(message.length());
    if (write(sockfd_, message.c_str(), len) != len) {
      GTEST_LOG_(WARNING)
          << "stream_result_to: failed to stream to "
          << host_name_ << ":" << port_num_;
    }
  }

  int sockfd_;   // socket file descriptor
  const string host_name_;
  const string port_num_;

  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamingListener);
};  // class StreamingListener

// Checks if str contains '=', '&', '%' or '\n' characters. If yes,
// replaces them by "%xx" where xx is their hexadecimal value. For
// example, replaces "=" with "%3D".  This algorithm is O(strlen(str))
// in both time and space -- important as the input str may contain an
// arbitrarily long test failure message and stack trace.
string StreamingListener::UrlEncode(const char* str) {
  string result;
  result.reserve(strlen(str) + 1);
  for (char ch = *str; ch != '\0'; ch = *++str) {
    switch (ch) {
      case '%':
      case '=':
      case '&':
      case '\n':
        result.append(String::Format("%%%02x", static_cast<unsigned char>(ch)));
        break;
      default:
        result.push_back(ch);
        break;
    }
  }
  return result;
}

void StreamingListener::MakeConnection() {
  GTEST_CHECK_(sockfd_ == -1)
      << "MakeConnection() can't be called when there is already a connection.";

  addrinfo hints;
  memset(&hints, 0, sizeof(hints));
  hints.ai_family = AF_UNSPEC;    // To allow both IPv4 and IPv6 addresses.
  hints.ai_socktype = SOCK_STREAM;
  addrinfo* servinfo = NULL;

  // Use the getaddrinfo() to get a linked list of IP addresses for
  // the given host name.
  const int error_num = getaddrinfo(
      host_name_.c_str(), port_num_.c_str(), &hints, &servinfo);
  if (error_num != 0) {
    GTEST_LOG_(WARNING) << "stream_result_to: getaddrinfo() failed: "
                        << gai_strerror(error_num);
  }

  // Loop through all the results and connect to the first we can.
  for (addrinfo* cur_addr = servinfo; sockfd_ == -1 && cur_addr != NULL;
       cur_addr = cur_addr->ai_next) {
    sockfd_ = socket(
        cur_addr->ai_family, cur_addr->ai_socktype, cur_addr->ai_protocol);
    if (sockfd_ != -1) {
      // Connect the client socket to the server socket.
      if (connect(sockfd_, cur_addr->ai_addr, cur_addr->ai_addrlen) == -1) {
        close(sockfd_);
        sockfd_ = -1;
      }
    }
  }

  freeaddrinfo(servinfo);  // all done with this structure

  if (sockfd_ == -1) {
    GTEST_LOG_(WARNING) << "stream_result_to: failed to connect to "
                        << host_name_ << ":" << port_num_;
  }
}

// End of class Streaming Listener
#endif  // GTEST_CAN_STREAM_RESULTS__

// Class ScopedTrace

// Pushes the given source file location and message onto a per-thread
// trace stack maintained by Google Test.
// L < UnitTest::mutex_
ScopedTrace::ScopedTrace(const char* file, int line, const Message& message) {
  TraceInfo trace;
  trace.file = file;
  trace.line = line;
  trace.message = message.GetString();

  UnitTest::GetInstance()->PushGTestTrace(trace);
}

// Pops the info pushed by the c'tor.
// L < UnitTest::mutex_
ScopedTrace::~ScopedTrace() {
  UnitTest::GetInstance()->PopGTestTrace();
}


// class OsStackTraceGetter

// Returns the current OS stack trace as a String.  Parameters:
//
//   max_depth  - the maximum number of stack frames to be included
//                in the trace.
//   skip_count - the number of top frames to be skipped; doesn't count
//                against max_depth.
//
// L < mutex_
// We use "L < mutex_" to denote that the function may acquire mutex_.
String OsStackTraceGetter::CurrentStackTrace(int, int) {
  return String("");
}

// L < mutex_
void OsStackTraceGetter::UponLeavingGTest() {
}

const char* const
OsStackTraceGetter::kElidedFramesMarker =
    "... " GTEST_NAME_ " internal frames ...";

}  // namespace internal

// class TestEventListeners

TestEventListeners::TestEventListeners()
    : repeater_(new internal::TestEventRepeater()),
      default_result_printer_(NULL),
      default_xml_generator_(NULL) {
}

TestEventListeners::~TestEventListeners() { delete repeater_; }

// Returns the standard listener responsible for the default console
// output.  Can be removed from the listeners list to shut down default
// console output.  Note that removing this object from the listener list
// with Release transfers its ownership to the user.
void TestEventListeners::Append(TestEventListener* listener) {
  repeater_->Append(listener);
}

// Removes the given event listener from the list and returns it.  It then
// becomes the caller's responsibility to delete the listener. Returns
// NULL if the listener is not found in the list.
TestEventListener* TestEventListeners::Release(TestEventListener* listener) {
  if (listener == default_result_printer_)
    default_result_printer_ = NULL;
  else if (listener == default_xml_generator_)
    default_xml_generator_ = NULL;
  return repeater_->Release(listener);
}

// Returns repeater that broadcasts the TestEventListener events to all
// subscribers.
TestEventListener* TestEventListeners::repeater() { return repeater_; }

// Sets the default_result_printer attribute to the provided listener.
// The listener is also added to the listener list and previous
// default_result_printer is removed from it and deleted. The listener can
// also be NULL in which case it will not be added to the list. Does
// nothing if the previous and the current listener objects are the same.
void TestEventListeners::SetDefaultResultPrinter(TestEventListener* listener) {
  if (default_result_printer_ != listener) {
    // It is an error to pass this method a listener that is already in the
    // list.
    delete Release(default_result_printer_);
    default_result_printer_ = listener;
    if (listener != NULL)
      Append(listener);
  }
}

// Sets the default_xml_generator attribute to the provided listener.  The
// listener is also added to the listener list and previous
// default_xml_generator is removed from it and deleted. The listener can
// also be NULL in which case it will not be added to the list. Does
// nothing if the previous and the current listener objects are the same.
void TestEventListeners::SetDefaultXmlGenerator(TestEventListener* listener) {
  if (default_xml_generator_ != listener) {
    // It is an error to pass this method a listener that is already in the
    // list.
    delete Release(default_xml_generator_);
    default_xml_generator_ = listener;
    if (listener != NULL)
      Append(listener);
  }
}

// Controls whether events will be forwarded by the repeater to the
// listeners in the list.
bool TestEventListeners::EventForwardingEnabled() const {
  return repeater_->forwarding_enabled();
}

void TestEventListeners::SuppressEventForwarding() {
  repeater_->set_forwarding_enabled(false);
}

// class UnitTest

// Gets the singleton UnitTest object.  The first time this method is
// called, a UnitTest object is constructed and returned.  Consecutive
// calls will return the same object.
//
// We don't protect this under mutex_ as a user is not supposed to
// call this before main() starts, from which point on the return
// value will never change.
UnitTest * UnitTest::GetInstance() {
  // When compiled with MSVC 7.1 in optimized mode, destroying the
  // UnitTest object upon exiting the program messes up the exit code,
  // causing successful tests to appear failed.  We have to use a
  // different implementation in this case to bypass the compiler bug.
  // This implementation makes the compiler happy, at the cost of
  // leaking the UnitTest object.

  // CodeGear C++Builder insists on a public destructor for the
  // default implementation.  Use this implementation to keep good OO
  // design with private destructor.

#if (_MSC_VER == 1310 && !defined(_DEBUG)) || defined(__BORLANDC__)
  static UnitTest* const instance = new UnitTest;
  return instance;
#else
  static UnitTest instance;
  return &instance;
#endif  // (_MSC_VER == 1310 && !defined(_DEBUG)) || defined(__BORLANDC__)
}

// Gets the number of successful test cases.
int UnitTest::successful_test_case_count() const {
  return impl()->successful_test_case_count();
}

// Gets the number of failed test cases.
int UnitTest::failed_test_case_count() const {
  return impl()->failed_test_case_count();
}

// Gets the number of all test cases.
int UnitTest::total_test_case_count() const {
  return impl()->total_test_case_count();
}

// Gets the number of all test cases that contain at least one test
// that should run.
int UnitTest::test_case_to_run_count() const {
  return impl()->test_case_to_run_count();
}

// Gets the number of successful tests.
int UnitTest::successful_test_count() const {
  return impl()->successful_test_count();
}

// Gets the number of failed tests.
int UnitTest::failed_test_count() const { return impl()->failed_test_count(); }

// Gets the number of disabled tests.
int UnitTest::disabled_test_count() const {
  return impl()->disabled_test_count();
}

// Gets the number of all tests.
int UnitTest::total_test_count() const { return impl()->total_test_count(); }

// Gets the number of tests that should run.
int UnitTest::test_to_run_count() const { return impl()->test_to_run_count(); }

// Gets the elapsed time, in milliseconds.
internal::TimeInMillis UnitTest::elapsed_time() const {
  return impl()->elapsed_time();
}

// Returns true iff the unit test passed (i.e. all test cases passed).
bool UnitTest::Passed() const { return impl()->Passed(); }

// Returns true iff the unit test failed (i.e. some test case failed
// or something outside of all tests failed).
bool UnitTest::Failed() const { return impl()->Failed(); }

// Gets the i-th test case among all the test cases. i can range from 0 to
// total_test_case_count() - 1. If i is not in that range, returns NULL.
const TestCase* UnitTest::GetTestCase(int i) const {
  return impl()->GetTestCase(i);
}

// Gets the i-th test case among all the test cases. i can range from 0 to
// total_test_case_count() - 1. If i is not in that range, returns NULL.
TestCase* UnitTest::GetMutableTestCase(int i) {
  return impl()->GetMutableTestCase(i);
}

// Returns the list of event listeners that can be used to track events
// inside Google Test.
TestEventListeners& UnitTest::listeners() {
  return *impl()->listeners();
}

// Registers and returns a global test environment.  When a test
// program is run, all global test environments will be set-up in the
// order they were registered.  After all tests in the program have
// finished, all global test environments will be torn-down in the
// *reverse* order they were registered.
//
// The UnitTest object takes ownership of the given environment.
//
// We don't protect this under mutex_, as we only support calling it
// from the main thread.
Environment* UnitTest::AddEnvironment(Environment* env) {
  if (env == NULL) {
    return NULL;
  }

  impl_->environments().push_back(env);
  return env;
}

// Adds a TestPartResult to the current TestResult object.  All Google Test
// assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc) eventually call
// this to report their results.  The user code should use the
// assertion macros instead of calling this directly.
// L < mutex_
void UnitTest::AddTestPartResult(TestPartResult::Type result_type,
                                 const char* file_name,
                                 int line_number,
                                 const internal::String& message,
                                 const internal::String& os_stack_trace) {
  Message msg;
  msg << message;

  internal::MutexLock lock(&mutex_);
  if (impl_->gtest_trace_stack().size() > 0) {
    msg << "\n" << GTEST_NAME_ << " trace:";

    for (int i = static_cast<int>(impl_->gtest_trace_stack().size());
         i > 0; --i) {
      const internal::TraceInfo& trace = impl_->gtest_trace_stack()[i - 1];
      msg << "\n" << internal::FormatFileLocation(trace.file, trace.line)
          << " " << trace.message;
    }
  }

  if (os_stack_trace.c_str() != NULL && !os_stack_trace.empty()) {
    msg << internal::kStackTraceMarker << os_stack_trace;
  }

  const TestPartResult result =
    TestPartResult(result_type, file_name, line_number,
                   msg.GetString().c_str());
  impl_->GetTestPartResultReporterForCurrentThread()->
      ReportTestPartResult(result);

  if (result_type != TestPartResult::kSuccess) {
    // gtest_break_on_failure takes precedence over
    // gtest_throw_on_failure.  This allows a user to set the latter
    // in the code (perhaps in order to use Google Test assertions
    // with another testing framework) and specify the former on the
    // command line for debugging.
    if (GTEST_FLAG(break_on_failure)) {
#if GTEST_OS_WINDOWS
      // Using DebugBreak on Windows allows gtest to still break into a debugger
      // when a failure happens and both the --gtest_break_on_failure and
      // the --gtest_catch_exceptions flags are specified.
      DebugBreak();
#else
      // Dereference NULL through a volatile pointer to prevent the compiler
      // from removing. We use this rather than abort() or __builtin_trap() for
      // portability: Symbian doesn't implement abort() well, and some debuggers
      // don't correctly trap abort().
      *static_cast<volatile int*>(NULL) = 1;
#endif  // GTEST_OS_WINDOWS
    } else if (GTEST_FLAG(throw_on_failure)) {
#if GTEST_HAS_EXCEPTIONS
      throw GoogleTestFailureException(result);
#else
      // We cannot call abort() as it generates a pop-up in debug mode
      // that cannot be suppressed in VC 7.1 or below.
      exit(1);
#endif
    }
  }
}

// Creates and adds a property to the current TestResult. If a property matching
// the supplied value already exists, updates its value instead.
void UnitTest::RecordPropertyForCurrentTest(const char* key,
                                            const char* value) {
  const TestProperty test_property(key, value);
  impl_->current_test_result()->RecordProperty(test_property);
}

// Runs all tests in this UnitTest object and prints the result.
// Returns 0 if successful, or 1 otherwise.
//
// We don't protect this under mutex_, as we only support calling it
// from the main thread.
int UnitTest::Run() {
  // Captures the value of GTEST_FLAG(catch_exceptions).  This value will be
  // used for the duration of the program.
  impl()->set_catch_exceptions(GTEST_FLAG(catch_exceptions));

#if GTEST_HAS_SEH
  const bool in_death_test_child_process =
      internal::GTEST_FLAG(internal_run_death_test).length() > 0;

  // Either the user wants Google Test to catch exceptions thrown by the
  // tests or this is executing in the context of death test child
  // process. In either case the user does not want to see pop-up dialogs
  // about crashes - they are expected.
  if (impl()->catch_exceptions() || in_death_test_child_process) {

# if !GTEST_OS_WINDOWS_MOBILE
    // SetErrorMode doesn't exist on CE.
    SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOALIGNMENTFAULTEXCEPT |
                 SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX);
# endif  // !GTEST_OS_WINDOWS_MOBILE

# if (defined(_MSC_VER) || GTEST_OS_WINDOWS_MINGW) && !GTEST_OS_WINDOWS_MOBILE
    // Death test children can be terminated with _abort().  On Windows,
    // _abort() can show a dialog with a warning message.  This forces the
    // abort message to go to stderr instead.
    _set_error_mode(_OUT_TO_STDERR);
# endif

# if _MSC_VER >= 1400 && !GTEST_OS_WINDOWS_MOBILE
    // In the debug version, Visual Studio pops up a separate dialog
    // offering a choice to debug the aborted program. We need to suppress
    // this dialog or it will pop up for every EXPECT/ASSERT_DEATH statement
    // executed. Google Test will notify the user of any unexpected
    // failure via stderr.
    //
    // VC++ doesn't define _set_abort_behavior() prior to the version 8.0.
    // Users of prior VC versions shall suffer the agony and pain of
    // clicking through the countless debug dialogs.
    // TODO(vladl@google.com): find a way to suppress the abort dialog() in the
    // debug mode when compiled with VC 7.1 or lower.
    if (!GTEST_FLAG(break_on_failure))
      _set_abort_behavior(
          0x0,                                    // Clear the following flags:
          _WRITE_ABORT_MSG | _CALL_REPORTFAULT);  // pop-up window, core dump.
# endif

  }
#endif  // GTEST_HAS_SEH

  return internal::HandleExceptionsInMethodIfSupported(
      impl(),
      &internal::UnitTestImpl::RunAllTests,
      "auxiliary test code (environments or event listeners)") ? 0 : 1;
}

// Returns the working directory when the first TEST() or TEST_F() was
// executed.
const char* UnitTest::original_working_dir() const {
  return impl_->original_working_dir_.c_str();
}

// Returns the TestCase object for the test that's currently running,
// or NULL if no test is running.
// L < mutex_
const TestCase* UnitTest::current_test_case() const {
  internal::MutexLock lock(&mutex_);
  return impl_->current_test_case();
}

// Returns the TestInfo object for the test that's currently running,
// or NULL if no test is running.
// L < mutex_
const TestInfo* UnitTest::current_test_info() const {
  internal::MutexLock lock(&mutex_);
  return impl_->current_test_info();
}

// Returns the random seed used at the start of the current test run.
int UnitTest::random_seed() const { return impl_->random_seed(); }

#if GTEST_HAS_PARAM_TEST
// Returns ParameterizedTestCaseRegistry object used to keep track of
// value-parameterized tests and instantiate and register them.
// L < mutex_
internal::ParameterizedTestCaseRegistry&
    UnitTest::parameterized_test_registry() {
  return impl_->parameterized_test_registry();
}
#endif  // GTEST_HAS_PARAM_TEST

// Creates an empty UnitTest.
UnitTest::UnitTest() {
  impl_ = new internal::UnitTestImpl(this);
}

// Destructor of UnitTest.
UnitTest::~UnitTest() {
  delete impl_;
}

// Pushes a trace defined by SCOPED_TRACE() on to the per-thread
// Google Test trace stack.
// L < mutex_
void UnitTest::PushGTestTrace(const internal::TraceInfo& trace) {
  internal::MutexLock lock(&mutex_);
  impl_->gtest_trace_stack().push_back(trace);
}

// Pops a trace from the per-thread Google Test trace stack.
// L < mutex_
void UnitTest::PopGTestTrace() {
  internal::MutexLock lock(&mutex_);
  impl_->gtest_trace_stack().pop_back();
}

namespace internal {

UnitTestImpl::UnitTestImpl(UnitTest* parent)
    : parent_(parent),
#ifdef _MSC_VER
# pragma warning(push)                    // Saves the current warning state.
# pragma warning(disable:4355)            // Temporarily disables warning 4355
                                         // (using this in initializer).
      default_global_test_part_result_reporter_(this),
      default_per_thread_test_part_result_reporter_(this),
# pragma warning(pop)                     // Restores the warning state again.
#else
      default_global_test_part_result_reporter_(this),
      default_per_thread_test_part_result_reporter_(this),
#endif  // _MSC_VER
      global_test_part_result_repoter_(
          &default_global_test_part_result_reporter_),
      per_thread_test_part_result_reporter_(
          &default_per_thread_test_part_result_reporter_),
#if GTEST_HAS_PARAM_TEST
      parameterized_test_registry_(),
      parameterized_tests_registered_(false),
#endif  // GTEST_HAS_PARAM_TEST
      last_death_test_case_(-1),
      current_test_case_(NULL),
      current_test_info_(NULL),
      ad_hoc_test_result_(),
      os_stack_trace_getter_(NULL),
      post_flag_parse_init_performed_(false),
      random_seed_(0),  // Will be overridden by the flag before first use.
      random_(0),  // Will be reseeded before first use.
      elapsed_time_(0),
#if GTEST_HAS_DEATH_TEST
      internal_run_death_test_flag_(NULL),
      death_test_factory_(new DefaultDeathTestFactory),
#endif
      // Will be overridden by the flag before first use.
      catch_exceptions_(false) {
  listeners()->SetDefaultResultPrinter(new PrettyUnitTestResultPrinter);
}

UnitTestImpl::~UnitTestImpl() {
  // Deletes every TestCase.
  ForEach(test_cases_, internal::Delete<TestCase>);

  // Deletes every Environment.
  ForEach(environments_, internal::Delete<Environment>);

  delete os_stack_trace_getter_;
}

#if GTEST_HAS_DEATH_TEST
// Disables event forwarding if the control is currently in a death test
// subprocess. Must not be called before InitGoogleTest.
void UnitTestImpl::SuppressTestEventsIfInSubprocess() {
  if (internal_run_death_test_flag_.get() != NULL)
    listeners()->SuppressEventForwarding();
}
#endif  // GTEST_HAS_DEATH_TEST

// Initializes event listeners performing XML output as specified by
// UnitTestOptions. Must not be called before InitGoogleTest.
void UnitTestImpl::ConfigureXmlOutput() {
  const String& output_format = UnitTestOptions::GetOutputFormat();
  if (output_format == "xml") {
    listeners()->SetDefaultXmlGenerator(new XmlUnitTestResultPrinter(
        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
  } else if (output_format != "") {
    printf("WARNING: unrecognized output format \"%s\" ignored.\n",
           output_format.c_str());
    fflush(stdout);
  }
}

#if GTEST_CAN_STREAM_RESULTS_
// Initializes event listeners for streaming test results in String form.
// Must not be called before InitGoogleTest.
void UnitTestImpl::ConfigureStreamingOutput() {
  const string& target = GTEST_FLAG(stream_result_to);
  if (!target.empty()) {
    const size_t pos = target.find(':');
    if (pos != string::npos) {
      listeners()->Append(new StreamingListener(target.substr(0, pos),
                                                target.substr(pos+1)));
    } else {
      printf("WARNING: unrecognized streaming target \"%s\" ignored.\n",
             target.c_str());
      fflush(stdout);
    }
  }
}
#endif  // GTEST_CAN_STREAM_RESULTS_

// Performs initialization dependent upon flag values obtained in
// ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
// ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
// this function is also called from RunAllTests.  Since this function can be
// called more than once, it has to be idempotent.
void UnitTestImpl::PostFlagParsingInit() {
  // Ensures that this function does not execute more than once.
  if (!post_flag_parse_init_performed_) {
    post_flag_parse_init_performed_ = true;

#if GTEST_HAS_DEATH_TEST
    InitDeathTestSubprocessControlInfo();
    SuppressTestEventsIfInSubprocess();
#endif  // GTEST_HAS_DEATH_TEST

    // Registers parameterized tests. This makes parameterized tests
    // available to the UnitTest reflection API without running
    // RUN_ALL_TESTS.
    RegisterParameterizedTests();

    // Configures listeners for XML output. This makes it possible for users
    // to shut down the default XML output before invoking RUN_ALL_TESTS.
    ConfigureXmlOutput();

#if GTEST_CAN_STREAM_RESULTS_
    // Configures listeners for streaming test results to the specified server.
    ConfigureStreamingOutput();
#endif  // GTEST_CAN_STREAM_RESULTS_
  }
}

// A predicate that checks the name of a TestCase against a known
// value.
//
// This is used for implementation of the UnitTest class only.  We put
// it in the anonymous namespace to prevent polluting the outer
// namespace.
//
// TestCaseNameIs is copyable.
class TestCaseNameIs {
 public:
  // Constructor.
  explicit TestCaseNameIs(const String& name)
      : name_(name) {}

  // Returns true iff the name of test_case matches name_.
  bool operator()(const TestCase* test_case) const {
    return test_case != NULL && strcmp(test_case->name(), name_.c_str()) == 0;
  }

 private:
  String name_;
};

// Finds and returns a TestCase with the given name.  If one doesn't
// exist, creates one and returns it.  It's the CALLER'S
// RESPONSIBILITY to ensure that this function is only called WHEN THE
// TESTS ARE NOT SHUFFLED.
//
// Arguments:
//
//   test_case_name: name of the test case
//   type_param:     the name of the test case's type parameter, or NULL if
//                   this is not a typed or a type-parameterized test case.
//   set_up_tc:      pointer to the function that sets up the test case
//   tear_down_tc:   pointer to the function that tears down the test case
TestCase* UnitTestImpl::GetTestCase(const char* test_case_name,
                                    const char* type_param,
                                    Test::SetUpTestCaseFunc set_up_tc,
                                    Test::TearDownTestCaseFunc tear_down_tc) {
  // Can we find a TestCase with the given name?
  const std::vector<TestCase*>::const_iterator test_case =
      std::find_if(test_cases_.begin(), test_cases_.end(),
                   TestCaseNameIs(test_case_name));

  if (test_case != test_cases_.end())
    return *test_case;

  // No.  Let's create one.
  TestCase* const new_test_case =
      new TestCase(test_case_name, type_param, set_up_tc, tear_down_tc);

  // Is this a death test case?
  if (internal::UnitTestOptions::MatchesFilter(String(test_case_name),
                                               kDeathTestCaseFilter)) {
    // Yes.  Inserts the test case after the last death test case
    // defined so far.  This only works when the test cases haven't
    // been shuffled.  Otherwise we may end up running a death test
    // after a non-death test.
    ++last_death_test_case_;
    test_cases_.insert(test_cases_.begin() + last_death_test_case_,
                       new_test_case);
  } else {
    // No.  Appends to the end of the list.
    test_cases_.push_back(new_test_case);
  }

  test_case_indices_.push_back(static_cast<int>(test_case_indices_.size()));
  return new_test_case;
}

// Helpers for setting up / tearing down the given environment.  They
// are for use in the ForEach() function.
static void SetUpEnvironment(Environment* env) { env->SetUp(); }
static void TearDownEnvironment(Environment* env) { env->TearDown(); }

// Runs all tests in this UnitTest object, prints the result, and
// returns true if all tests are successful.  If any exception is
// thrown during a test, the test is considered to be failed, but the
// rest of the tests will still be run.
//
// When parameterized tests are enabled, it expands and registers
// parameterized tests first in RegisterParameterizedTests().
// All other functions called from RunAllTests() may safely assume that
// parameterized tests are ready to be counted and run.
bool UnitTestImpl::RunAllTests() {
  // Makes sure InitGoogleTest() was called.
  if (!GTestIsInitialized()) {
    printf("%s",
           "\nThis test program did NOT call ::testing::InitGoogleTest "
           "before calling RUN_ALL_TESTS().  Please fix it.\n");
    return false;
  }

  // Do not run any test if the --help flag was specified.
  if (g_help_flag)
    return true;

  // Repeats the call to the post-flag parsing initialization in case the
  // user didn't call InitGoogleTest.
  PostFlagParsingInit();

  // Even if sharding is not on, test runners may want to use the
  // GTEST_SHARD_STATUS_FILE to query whether the test supports the sharding
  // protocol.
  internal::WriteToShardStatusFileIfNeeded();

  // True iff we are in a subprocess for running a thread-safe-style
  // death test.
  bool in_subprocess_for_death_test = false;

#if GTEST_HAS_DEATH_TEST
  in_subprocess_for_death_test = (internal_run_death_test_flag_.get() != NULL);
#endif  // GTEST_HAS_DEATH_TEST

  const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
                                        in_subprocess_for_death_test);

  // Compares the full test names with the filter to decide which
  // tests to run.
  const bool has_tests_to_run = FilterTests(should_shard
                                              ? HONOR_SHARDING_PROTOCOL
                                              : IGNORE_SHARDING_PROTOCOL) > 0;

  // Lists the tests and exits if the --gtest_list_tests flag was specified.
  if (GTEST_FLAG(list_tests)) {
    // This must be called *after* FilterTests() has been called.
    ListTestsMatchingFilter();
    return true;
  }

  random_seed_ = GTEST_FLAG(shuffle) ?
      GetRandomSeedFromFlag(GTEST_FLAG(random_seed)) : 0;

  // True iff at least one test has failed.
  bool failed = false;

  TestEventListener* repeater = listeners()->repeater();

  repeater->OnTestProgramStart(*parent_);

  // How many times to repeat the tests?  We don't want to repeat them
  // when we are inside the subprocess of a death test.
  const int repeat = in_subprocess_for_death_test ? 1 : GTEST_FLAG(repeat);
  // Repeats forever if the repeat count is negative.
  const bool forever = repeat < 0;
  for (int i = 0; forever || i != repeat; i++) {
    // We want to preserve failures generated by ad-hoc test
    // assertions executed before RUN_ALL_TESTS().
    ClearNonAdHocTestResult();

    const TimeInMillis start = GetTimeInMillis();

    // Shuffles test cases and tests if requested.
    if (has_tests_to_run && GTEST_FLAG(shuffle)) {
      random()->Reseed(random_seed_);
      // This should be done before calling OnTestIterationStart(),
      // such that a test event listener can see the actual test order
      // in the event.
      ShuffleTests();
    }

    // Tells the unit test event listeners that the tests are about to start.
    repeater->OnTestIterationStart(*parent_, i);

    // Runs each test case if there is at least one test to run.
    if (has_tests_to_run) {
      // Sets up all environments beforehand.
      repeater->OnEnvironmentsSetUpStart(*parent_);
      ForEach(environments_, SetUpEnvironment);
      repeater->OnEnvironmentsSetUpEnd(*parent_);

      // Runs the tests only if there was no fatal failure during global
      // set-up.
      if (!Test::HasFatalFailure()) {
        for (int test_index = 0; test_index < total_test_case_count();
             test_index++) {
          GetMutableTestCase(test_index)->Run();
        }
      }

      // Tears down all environments in reverse order afterwards.
      repeater->OnEnvironmentsTearDownStart(*parent_);
      std::for_each(environments_.rbegin(), environments_.rend(),
                    TearDownEnvironment);
      repeater->OnEnvironmentsTearDownEnd(*parent_);
    }

    elapsed_time_ = GetTimeInMillis() - start;

    // Tells the unit test event listener that the tests have just finished.
    repeater->OnTestIterationEnd(*parent_, i);

    // Gets the result and clears it.
    if (!Passed()) {
      failed = true;
    }

    // Restores the original test order after the iteration.  This
    // allows the user to quickly repro a failure that happens in the
    // N-th iteration without repeating the first (N - 1) iterations.
    // This is not enclosed in "if (GTEST_FLAG(shuffle)) { ... }", in
    // case the user somehow changes the value of the flag somewhere
    // (it's always safe to unshuffle the tests).
    UnshuffleTests();

    if (GTEST_FLAG(shuffle)) {
      // Picks a new random seed for each iteration.
      random_seed_ = GetNextRandomSeed(random_seed_);
    }
  }

  repeater->OnTestProgramEnd(*parent_);

  return !failed;
}

// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
// if the variable is present. If a file already exists at this location, this
// function will write over it. If the variable is present, but the file cannot
// be created, prints an error and exits.
void WriteToShardStatusFileIfNeeded() {
  const char* const test_shard_file = posix::GetEnv(kTestShardStatusFile);
  if (test_shard_file != NULL) {
    FILE* const file = posix::FOpen(test_shard_file, "w");
    if (file == NULL) {
      ColoredPrintf(COLOR_RED,
                    "Could not write to the test shard status file \"%s\" "
                    "specified by the %s environment variable.\n",
                    test_shard_file, kTestShardStatusFile);
      fflush(stdout);
      exit(EXIT_FAILURE);
    }
    fclose(file);
  }
}

// Checks whether sharding is enabled by examining the relevant
// environment variable values. If the variables are present,
// but inconsistent (i.e., shard_index >= total_shards), prints
// an error and exits. If in_subprocess_for_death_test, sharding is
// disabled because it must only be applied to the original test
// process. Otherwise, we could filter out death tests we intended to execute.
bool ShouldShard(const char* total_shards_env,
                 const char* shard_index_env,
                 bool in_subprocess_for_death_test) {
  if (in_subprocess_for_death_test) {
    return false;
  }

  const Int32 total_shards = Int32FromEnvOrDie(total_shards_env, -1);
  const Int32 shard_index = Int32FromEnvOrDie(shard_index_env, -1);

  if (total_shards == -1 && shard_index == -1) {
    return false;
  } else if (total_shards == -1 && shard_index != -1) {
    const Message msg = Message()
      << "Invalid environment variables: you have "
      << kTestShardIndex << " = " << shard_index
      << ", but have left " << kTestTotalShards << " unset.\n";
    ColoredPrintf(COLOR_RED, msg.GetString().c_str());
    fflush(stdout);
    exit(EXIT_FAILURE);
  } else if (total_shards != -1 && shard_index == -1) {
    const Message msg = Message()
      << "Invalid environment variables: you have "
      << kTestTotalShards << " = " << total_shards
      << ", but have left " << kTestShardIndex << " unset.\n";
    ColoredPrintf(COLOR_RED, msg.GetString().c_str());
    fflush(stdout);
    exit(EXIT_FAILURE);
  } else if (shard_index < 0 || shard_index >= total_shards) {
    const Message msg = Message()
      << "Invalid environment variables: we require 0 <= "
      << kTestShardIndex << " < " << kTestTotalShards
      << ", but you have " << kTestShardIndex << "=" << shard_index
      << ", " << kTestTotalShards << "=" << total_shards << ".\n";
    ColoredPrintf(COLOR_RED, msg.GetString().c_str());
    fflush(stdout);
    exit(EXIT_FAILURE);
  }

  return total_shards > 1;
}

// Parses the environment variable var as an Int32. If it is unset,
// returns default_val. If it is not an Int32, prints an error
// and aborts.
Int32 Int32FromEnvOrDie(const char* var, Int32 default_val) {
  const char* str_val = posix::GetEnv(var);
  if (str_val == NULL) {
    return default_val;
  }

  Int32 result;
  if (!ParseInt32(Message() << "The value of environment variable " << var,
                  str_val, &result)) {
    exit(EXIT_FAILURE);
  }
  return result;
}

// Given the total number of shards, the shard index, and the test id,
// returns true iff the test should be run on this shard. The test id is
// some arbitrary but unique non-negative integer assigned to each test
// method. Assumes that 0 <= shard_index < total_shards.
bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
  return (test_id % total_shards) == shard_index;
}

// Compares the name of each test with the user-specified filter to
// decide whether the test should be run, then records the result in
// each TestCase and TestInfo object.
// If shard_tests == true, further filters tests based on sharding
// variables in the environment - see
// http://code.google.com/p/googletest/wiki/GoogleTestAdvancedGuide.
// Returns the number of tests that should run.
int UnitTestImpl::FilterTests(ReactionToSharding shard_tests) {
  const Int32 total_shards = shard_tests == HONOR_SHARDING_PROTOCOL ?
      Int32FromEnvOrDie(kTestTotalShards, -1) : -1;
  const Int32 shard_index = shard_tests == HONOR_SHARDING_PROTOCOL ?
      Int32FromEnvOrDie(kTestShardIndex, -1) : -1;

  // num_runnable_tests are the number of tests that will
  // run across all shards (i.e., match filter and are not disabled).
  // num_selected_tests are the number of tests to be run on
  // this shard.
  int num_runnable_tests = 0;
  int num_selected_tests = 0;
  for (size_t i = 0; i < test_cases_.size(); i++) {
    TestCase* const test_case = test_cases_[i];
    const String &test_case_name = test_case->name();
    test_case->set_should_run(false);

    for (size_t j = 0; j < test_case->test_info_list().size(); j++) {
      TestInfo* const test_info = test_case->test_info_list()[j];
      const String test_name(test_info->name());
      // A test is disabled if test case name or test name matches
      // kDisableTestFilter.
      const bool is_disabled =
          internal::UnitTestOptions::MatchesFilter(test_case_name,
                                                   kDisableTestFilter) ||
          internal::UnitTestOptions::MatchesFilter(test_name,
                                                   kDisableTestFilter);
      test_info->is_disabled_ = is_disabled;

      const bool matches_filter =
          internal::UnitTestOptions::FilterMatchesTest(test_case_name,
                                                       test_name);
      test_info->matches_filter_ = matches_filter;

      const bool is_runnable =
          (GTEST_FLAG(also_run_disabled_tests) || !is_disabled) &&
          matches_filter;

      const bool is_selected = is_runnable &&
          (shard_tests == IGNORE_SHARDING_PROTOCOL ||
           ShouldRunTestOnShard(total_shards, shard_index,
                                num_runnable_tests));

      num_runnable_tests += is_runnable;
      num_selected_tests += is_selected;

      test_info->should_run_ = is_selected;
      test_case->set_should_run(test_case->should_run() || is_selected);
    }
  }
  return num_selected_tests;
}

// Prints the names of the tests matching the user-specified filter flag.
void UnitTestImpl::ListTestsMatchingFilter() {
  for (size_t i = 0; i < test_cases_.size(); i++) {
    const TestCase* const test_case = test_cases_[i];
    bool printed_test_case_name = false;

    for (size_t j = 0; j < test_case->test_info_list().size(); j++) {
      const TestInfo* const test_info =
          test_case->test_info_list()[j];
      if (test_info->matches_filter_) {
        if (!printed_test_case_name) {
          printed_test_case_name = true;
          printf("%s.\n", test_case->name());
        }
        printf("  %s\n", test_info->name());
      }
    }
  }
  fflush(stdout);
}

// Sets the OS stack trace getter.
//
// Does nothing if the input and the current OS stack trace getter are
// the same; otherwise, deletes the old getter and makes the input the
// current getter.
void UnitTestImpl::set_os_stack_trace_getter(
    OsStackTraceGetterInterface* getter) {
  if (os_stack_trace_getter_ != getter) {
    delete os_stack_trace_getter_;
    os_stack_trace_getter_ = getter;
  }
}

// Returns the current OS stack trace getter if it is not NULL;
// otherwise, creates an OsStackTraceGetter, makes it the current
// getter, and returns it.
OsStackTraceGetterInterface* UnitTestImpl::os_stack_trace_getter() {
  if (os_stack_trace_getter_ == NULL) {
    os_stack_trace_getter_ = new OsStackTraceGetter;
  }

  return os_stack_trace_getter_;
}

// Returns the TestResult for the test that's currently running, or
// the TestResult for the ad hoc test if no test is running.
TestResult* UnitTestImpl::current_test_result() {
  return current_test_info_ ?
      &(current_test_info_->result_) : &ad_hoc_test_result_;
}

// Shuffles all test cases, and the tests within each test case,
// making sure that death tests are still run first.
void UnitTestImpl::ShuffleTests() {
  // Shuffles the death test cases.
  ShuffleRange(random(), 0, last_death_test_case_ + 1, &test_case_indices_);

  // Shuffles the non-death test cases.
  ShuffleRange(random(), last_death_test_case_ + 1,
               static_cast<int>(test_cases_.size()), &test_case_indices_);

  // Shuffles the tests inside each test case.
  for (size_t i = 0; i < test_cases_.size(); i++) {
    test_cases_[i]->ShuffleTests(random());
  }
}

// Restores the test cases and tests to their order before the first shuffle.
void UnitTestImpl::UnshuffleTests() {
  for (size_t i = 0; i < test_cases_.size(); i++) {
    // Unshuffles the tests in each test case.
    test_cases_[i]->UnshuffleTests();
    // Resets the index of each test case.
    test_case_indices_[i] = static_cast<int>(i);
  }
}

// Returns the current OS stack trace as a String.
//
// The maximum number of stack frames to be included is specified by
// the gtest_stack_trace_depth flag.  The skip_count parameter
// specifies the number of top frames to be skipped, which doesn't
// count against the number of frames to be included.
//
// For example, if Foo() calls Bar(), which in turn calls
// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
String GetCurrentOsStackTraceExceptTop(UnitTest* /*unit_test*/,
                                       int skip_count) {
  // We pass skip_count + 1 to skip this wrapper function in addition
  // to what the user really wants to skip.
  return GetUnitTestImpl()->CurrentOsStackTraceExceptTop(skip_count + 1);
}

// Used by the GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_ macro to
// suppress unreachable code warnings.
namespace {
class ClassUniqueToAlwaysTrue {};
}

bool IsTrue(bool condition) { return condition; }

bool AlwaysTrue() {
#if GTEST_HAS_EXCEPTIONS
  // This condition is always false so AlwaysTrue() never actually throws,
  // but it makes the compiler think that it may throw.
  if (IsTrue(false))
    throw ClassUniqueToAlwaysTrue();
#endif  // GTEST_HAS_EXCEPTIONS
  return true;
}

// If *pstr starts with the given prefix, modifies *pstr to be right
// past the prefix and returns true; otherwise leaves *pstr unchanged
// and returns false.  None of pstr, *pstr, and prefix can be NULL.
bool SkipPrefix(const char* prefix, const char** pstr) {
  const size_t prefix_len = strlen(prefix);
  if (strncmp(*pstr, prefix, prefix_len) == 0) {
    *pstr += prefix_len;
    return true;
  }
  return false;
}

// Parses a string as a command line flag.  The string should have
// the format "--flag=value".  When def_optional is true, the "=value"
// part can be omitted.
//
// Returns the value of the flag, or NULL if the parsing failed.
const char* ParseFlagValue(const char* str,
                           const char* flag,
                           bool def_optional) {
  // str and flag must not be NULL.
  if (str == NULL || flag == NULL) return NULL;

  // The flag must start with "--" followed by GTEST_FLAG_PREFIX_.
  const String flag_str = String::Format("--%s%s", GTEST_FLAG_PREFIX_, flag);
  const size_t flag_len = flag_str.length();
  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return NULL;

  // Skips the flag name.
  const char* flag_end = str + flag_len;

  // When def_optional is true, it's OK to not have a "=value" part.
  if (def_optional && (flag_end[0] == '\0')) {
    return flag_end;
  }

  // If def_optional is true and there are more characters after the
  // flag name, or if def_optional is false, there must be a '=' after
  // the flag name.
  if (flag_end[0] != '=') return NULL;

  // Returns the string after "=".
  return flag_end + 1;
}

// Parses a string for a bool flag, in the form of either
// "--flag=value" or "--flag".
//
// In the former case, the value is taken as true as long as it does
// not start with '0', 'f', or 'F'.
//
// In the latter case, the value is taken as true.
//
// On success, stores the value of the flag in *value, and returns
// true.  On failure, returns false without changing *value.
bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
  // Gets the value of the flag as a string.
  const char* const value_str = ParseFlagValue(str, flag, true);

  // Aborts if the parsing failed.
  if (value_str == NULL) return false;

  // Converts the string value to a bool.
  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
  return true;
}

// Parses a string for an Int32 flag, in the form of
// "--flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true.  On failure, returns false without changing *value.
bool ParseInt32Flag(const char* str, const char* flag, Int32* value) {
  // Gets the value of the flag as a string.
  const char* const value_str = ParseFlagValue(str, flag, false);

  // Aborts if the parsing failed.
  if (value_str == NULL) return false;

  // Sets *value to the value of the flag.
  return ParseInt32(Message() << "The value of flag --" << flag,
                    value_str, value);
}

// Parses a string for a string flag, in the form of
// "--flag=value".
//
// On success, stores the value of the flag in *value, and returns
// true.  On failure, returns false without changing *value.
bool ParseStringFlag(const char* str, const char* flag, String* value) {
  // Gets the value of the flag as a string.
  const char* const value_str = ParseFlagValue(str, flag, false);

  // Aborts if the parsing failed.
  if (value_str == NULL) return false;

  // Sets *value to the value of the flag.
  *value = value_str;
  return true;
}

// Determines whether a string has a prefix that Google Test uses for its
// flags, i.e., starts with GTEST_FLAG_PREFIX_ or GTEST_FLAG_PREFIX_DASH_.
// If Google Test detects that a command line flag has its prefix but is not
// recognized, it will print its help message. Flags starting with
// GTEST_INTERNAL_PREFIX_ followed by "internal_" are considered Google Test
// internal flags and do not trigger the help message.
static bool HasGoogleTestFlagPrefix(const char* str) {
  return (SkipPrefix("--", &str) ||
          SkipPrefix("-", &str) ||
          SkipPrefix("/", &str)) &&
         !SkipPrefix(GTEST_FLAG_PREFIX_ "internal_", &str) &&
         (SkipPrefix(GTEST_FLAG_PREFIX_, &str) ||
          SkipPrefix(GTEST_FLAG_PREFIX_DASH_, &str));
}

// Prints a string containing code-encoded text.  The following escape
// sequences can be used in the string to control the text color:
//
//   @@    prints a single '@' character.
//   @R    changes the color to red.
//   @G    changes the color to green.
//   @Y    changes the color to yellow.
//   @D    changes to the default terminal text color.
//
// TODO(wan@google.com): Write tests for this once we add stdout
// capturing to Google Test.
static void PrintColorEncoded(const char* str) {
  GTestColor color = COLOR_DEFAULT;  // The current color.

  // Conceptually, we split the string into segments divided by escape
  // sequences.  Then we print one segment at a time.  At the end of
  // each iteration, the str pointer advances to the beginning of the
  // next segment.
  for (;;) {
    const char* p = strchr(str, '@');
    if (p == NULL) {
      ColoredPrintf(color, "%s", str);
      return;
    }

    ColoredPrintf(color, "%s", String(str, p - str).c_str());

    const char ch = p[1];
    str = p + 2;
    if (ch == '@') {
      ColoredPrintf(color, "@");
    } else if (ch == 'D') {
      color = COLOR_DEFAULT;
    } else if (ch == 'R') {
      color = COLOR_RED;
    } else if (ch == 'G') {
      color = COLOR_GREEN;
    } else if (ch == 'Y') {
      color = COLOR_YELLOW;
    } else {
      --str;
    }
  }
}

static const char kColorEncodedHelpMessage[] =
"This program contains tests written using " GTEST_NAME_ ". You can use the\n"
"following command line flags to control its behavior:\n"
"\n"
"Test Selection:\n"
"  @G--" GTEST_FLAG_PREFIX_ "list_tests@D\n"
"      List the names of all tests instead of running them. The name of\n"
"      TEST(Foo, Bar) is \"Foo.Bar\".\n"
"  @G--" GTEST_FLAG_PREFIX_ "filter=@YPOSTIVE_PATTERNS"
    "[@G-@YNEGATIVE_PATTERNS]@D\n"
"      Run only the tests whose name matches one of the positive patterns but\n"
"      none of the negative patterns. '?' matches any single character; '*'\n"
"      matches any substring; ':' separates two patterns.\n"
"  @G--" GTEST_FLAG_PREFIX_ "also_run_disabled_tests@D\n"
"      Run all disabled tests too.\n"
"\n"
"Test Execution:\n"
"  @G--" GTEST_FLAG_PREFIX_ "repeat=@Y[COUNT]@D\n"
"      Run the tests repeatedly; use a negative count to repeat forever.\n"
"  @G--" GTEST_FLAG_PREFIX_ "shuffle@D\n"
"      Randomize tests' orders on every iteration.\n"
"  @G--" GTEST_FLAG_PREFIX_ "random_seed=@Y[NUMBER]@D\n"
"      Random number seed to use for shuffling test orders (between 1 and\n"
"      99999, or 0 to use a seed based on the current time).\n"
"\n"
"Test Output:\n"
"  @G--" GTEST_FLAG_PREFIX_ "color=@Y(@Gyes@Y|@Gno@Y|@Gauto@Y)@D\n"
"      Enable/disable colored output. The default is @Gauto@D.\n"
"  -@G-" GTEST_FLAG_PREFIX_ "print_time=0@D\n"
"      Don't print the elapsed time of each test.\n"
"  @G--" GTEST_FLAG_PREFIX_ "output=xml@Y[@G:@YDIRECTORY_PATH@G"
    GTEST_PATH_SEP_ "@Y|@G:@YFILE_PATH]@D\n"
"      Generate an XML report in the given directory or with the given file\n"
"      name. @YFILE_PATH@D defaults to @Gtest_details.xml@D.\n"
#if GTEST_CAN_STREAM_RESULTS_
"  @G--" GTEST_FLAG_PREFIX_ "stream_result_to=@YHOST@G:@YPORT@D\n"
"      Stream test results to the given server.\n"
#endif  // GTEST_CAN_STREAM_RESULTS_
"\n"
"Assertion Behavior:\n"
#if GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
"  @G--" GTEST_FLAG_PREFIX_ "death_test_style=@Y(@Gfast@Y|@Gthreadsafe@Y)@D\n"
"      Set the default death test style.\n"
#endif  // GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
"  @G--" GTEST_FLAG_PREFIX_ "break_on_failure@D\n"
"      Turn assertion failures into debugger break-points.\n"
"  @G--" GTEST_FLAG_PREFIX_ "throw_on_failure@D\n"
"      Turn assertion failures into C++ exceptions.\n"
"  @G--" GTEST_FLAG_PREFIX_ "catch_exceptions=0@D\n"
"      Do not report exceptions as test failures. Instead, allow them\n"
"      to crash the program or throw a pop-up (on Windows).\n"
"\n"
"Except for @G--" GTEST_FLAG_PREFIX_ "list_tests@D, you can alternatively set "
    "the corresponding\n"
"environment variable of a flag (all letters in upper-case). For example, to\n"
"disable colored text output, you can either specify @G--" GTEST_FLAG_PREFIX_
    "color=no@D or set\n"
"the @G" GTEST_FLAG_PREFIX_UPPER_ "COLOR@D environment variable to @Gno@D.\n"
"\n"
"For more information, please read the " GTEST_NAME_ " documentation at\n"
"@G" GTEST_PROJECT_URL_ "@D. If you find a bug in " GTEST_NAME_ "\n"
"(not one in your own code or tests), please report it to\n"
"@G<" GTEST_DEV_EMAIL_ ">@D.\n";

// Parses the command line for Google Test flags, without initializing
// other parts of Google Test.  The type parameter CharType can be
// instantiated to either char or wchar_t.
template <typename CharType>
void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
  for (int i = 1; i < *argc; i++) {
    const String arg_string = StreamableToString(argv[i]);
    const char* const arg = arg_string.c_str();

    using internal::ParseBoolFlag;
    using internal::ParseInt32Flag;
    using internal::ParseStringFlag;

    // Do we see a Google Test flag?
    if (ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
                      &GTEST_FLAG(also_run_disabled_tests)) ||
        ParseBoolFlag(arg, kBreakOnFailureFlag,
                      &GTEST_FLAG(break_on_failure)) ||
        ParseBoolFlag(arg, kCatchExceptionsFlag,
                      &GTEST_FLAG(catch_exceptions)) ||
        ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
        ParseStringFlag(arg, kDeathTestStyleFlag,
                        &GTEST_FLAG(death_test_style)) ||
        ParseBoolFlag(arg, kDeathTestUseFork,
                      &GTEST_FLAG(death_test_use_fork)) ||
        ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
        ParseStringFlag(arg, kInternalRunDeathTestFlag,
                        &GTEST_FLAG(internal_run_death_test)) ||
        ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
        ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
        ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
        ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
        ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
        ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
        ParseInt32Flag(arg, kStackTraceDepthFlag,
                       &GTEST_FLAG(stack_trace_depth)) ||
        ParseStringFlag(arg, kStreamResultToFlag,
                        &GTEST_FLAG(stream_result_to)) ||
        ParseBoolFlag(arg, kThrowOnFailureFlag,
                      &GTEST_FLAG(throw_on_failure))
        ) {
      // Yes.  Shift the remainder of the argv list left by one.  Note
      // that argv has (*argc + 1) elements, the last one always being
      // NULL.  The following loop moves the trailing NULL element as
      // well.
      for (int j = i; j != *argc; j++) {
        argv[j] = argv[j + 1];
      }

      // Decrements the argument count.
      (*argc)--;

      // We also need to decrement the iterator as we just removed
      // an element.
      i--;
    } else if (arg_string == "--help" || arg_string == "-h" ||
               arg_string == "-?" || arg_string == "/?" ||
               HasGoogleTestFlagPrefix(arg)) {
      // Both help flag and unrecognized Google Test flags (excluding
      // internal ones) trigger help display.
      g_help_flag = true;
    }
  }

  if (g_help_flag) {
    // We print the help here instead of in RUN_ALL_TESTS(), as the
    // latter may not be called at all if the user is using Google
    // Test with another testing framework.
    PrintColorEncoded(kColorEncodedHelpMessage);
  }
}

// Parses the command line for Google Test flags, without initializing
// other parts of Google Test.
void ParseGoogleTestFlagsOnly(int* argc, char** argv) {
  ParseGoogleTestFlagsOnlyImpl(argc, argv);
}
void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv) {
  ParseGoogleTestFlagsOnlyImpl(argc, argv);
}

// The internal implementation of InitGoogleTest().
//
// The type parameter CharType can be instantiated to either char or
// wchar_t.
template <typename CharType>
void InitGoogleTestImpl(int* argc, CharType** argv) {
  g_init_gtest_count++;

  // We don't want to run the initialization code twice.
  if (g_init_gtest_count != 1) return;

  if (*argc <= 0) return;

  internal::g_executable_path = internal::StreamableToString(argv[0]);

#if GTEST_HAS_DEATH_TEST

  g_argvs.clear();
  for (int i = 0; i != *argc; i++) {
    g_argvs.push_back(StreamableToString(argv[i]));
  }

#endif  // GTEST_HAS_DEATH_TEST

  ParseGoogleTestFlagsOnly(argc, argv);
  GetUnitTestImpl()->PostFlagParsingInit();
}

}  // namespace internal

// Initializes Google Test.  This must be called before calling
// RUN_ALL_TESTS().  In particular, it parses a command line for the
// flags that Google Test recognizes.  Whenever a Google Test flag is
// seen, it is removed from argv, and *argc is decremented.
//
// No value is returned.  Instead, the Google Test flag variables are
// updated.
//
// Calling the function for the second time has no user-visible effect.
void InitGoogleTest(int* argc, char** argv) {
  internal::InitGoogleTestImpl(argc, argv);
}

// This overloaded version can be used in Windows programs compiled in
// UNICODE mode.
void InitGoogleTest(int* argc, wchar_t** argv) {
  internal::InitGoogleTestImpl(argc, argv);
}

}  // namespace testing