summaryrefslogtreecommitdiffstats
path: root/tests.sh
blob: 4ac9763dd36afb3af9e815368e61b84c7ea3d080 (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
#!/usr/bin/env bash

############################################################################
# bfs                                                                      #
# Copyright (C) 2015-2021 Tavian Barnes <tavianator@tavianator.com>        #
#                                                                          #
# Permission to use, copy, modify, and/or distribute this software for any #
# purpose with or without fee is hereby granted.                           #
#                                                                          #
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES #
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF         #
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR  #
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES   #
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN    #
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF  #
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.           #
############################################################################

set -e
umask 022

export LC_ALL=C
export TZ=UTC0

export ASAN_OPTIONS="abort_on_error=1"
export LSAN_OPTIONS="abort_on_error=1"
export MSAN_OPTIONS="abort_on_error=1"
export TSAN_OPTIONS="abort_on_error=1"
export UBSAN_OPTIONS="abort_on_error=1"

if [ -t 1 ]; then
    BLD="$(printf '\033[01m')"
    RED="$(printf '\033[01;31m')"
    GRN="$(printf '\033[01;32m')"
    YLW="$(printf '\033[01;33m')"
    BLU="$(printf '\033[01;34m')"
    MAG="$(printf '\033[01;35m')"
    CYN="$(printf '\033[01;36m')"
    RST="$(printf '\033[0m')"
fi

UNAME="$(uname)"

if command -v capsh &>/dev/null; then
    if capsh --has-p=cap_dac_override &>/dev/null || capsh --has-p=cap_dac_read_search &>/dev/null; then
	if [ -n "$BFS_TRIED_DROP" ]; then
            cat >&2 <<EOF
${RED}error:${RST} Failed to drop capabilities.
EOF

	    exit 1
	fi

        cat >&2 <<EOF
${YLW}warning:${RST} Running as ${BLD}$(id -un)${RST} is not recommended.  Dropping ${BLD}cap_dac_override${RST} and
${BLD}cap_dac_read_search${RST}.

EOF

        BFS_TRIED_DROP=y exec capsh \
            --drop=cap_dac_override,cap_dac_read_search \
            --caps=cap_dac_override,cap_dac_read_search-eip \
            -- "$0" "$@"
    fi
elif [ "$EUID" -eq 0 ]; then
    UNLESS=
    if [ "$UNAME" = "Linux" ]; then
	UNLESS=" unless ${GRN}capsh${RST} is installed"
    fi

    cat >&2 <<EOF
${RED}error:${RST} These tests expect filesystem permissions to be enforced, and therefore
will not work when run as ${BLD}$(id -un)${RST}${UNLESS}.
EOF
    exit 1
fi

function usage() {
    local pad=$(printf "%*s" ${#0} "")
    cat <<EOF
Usage: ${GRN}$0${RST} [${BLU}--bfs${RST}=${MAG}path/to/bfs${RST}] [${BLU}--posix${RST}] [${BLU}--bsd${RST}] [${BLU}--gnu${RST}] [${BLU}--all${RST}] [${BLU}--sudo${RST}]
       $pad [${BLU}--noclean${RST}] [${BLU}--update${RST}] [${BLU}--verbose${RST}] [${BLU}--help${RST}]
       $pad [${BLD}test_*${RST} [${BLD}test_*${RST} ...]]

  ${BLU}--bfs${RST}=${MAG}path/to/bfs${RST}
      Set the path to the bfs executable to test (default: ${MAG}./bfs${RST})

  ${BLU}--posix${RST}, ${BLU}--bsd${RST}, ${BLU}--gnu${RST}, ${BLU}--all${RST}
      Choose which test cases to run (default: ${BLU}--all${RST})

  ${BLU}--sudo${RST}
      Run tests that require root (not included in ${BLU}--all${RST})

  ${BLU}--noclean${RST}
      Keep the test directories around after the run

  ${BLU}--update${RST}
      Update the expected outputs for the test cases

  ${BLU}--verbose${RST}
      Log the commands that get executed

  ${BLU}--help${RST}
      This message

  ${BLD}test_*${RST}
      Select individual test cases to run
EOF
}

DEFAULT=yes
POSIX=
BSD=
GNU=
ALL=
SUDO=
CLEAN=yes
UPDATE=
VERBOSE=
EXPLICIT=

enabled_tests=()

for arg; do
    case "$arg" in
        --bfs=*)
            BFS="${arg#*=}"
            ;;
        --posix)
            DEFAULT=
            POSIX=yes
            ;;
        --bsd)
            DEFAULT=
            POSIX=yes
            BSD=yes
            ;;
        --gnu)
            DEFAULT=
            POSIX=yes
            GNU=yes
            ;;
        --all)
            DEFAULT=
            POSIX=yes
            BSD=yes
            GNU=yes
            ALL=yes
            ;;
        --sudo)
            DEFAULT=
            SUDO=yes
            ;;
        --noclean)
            CLEAN=
            ;;
        --update)
            UPDATE=yes
            ;;
        --verbose)
            VERBOSE=yes
            ;;
        --help)
            usage
            exit 0
            ;;
        test_*)
            EXPLICIT=yes
            enabled_tests+=("$arg")
            ;;
        *)
            printf "${RED}error:${RST} Unrecognized option '%s'.\n\n" "$arg" >&2
            usage >&2
            exit 1
            ;;
    esac
done

posix_tests=(
    # General parsing
    test_basic

    test_parens
    test_bang
    test_implicit_and
    test_a
    test_o

    test_weird_names

    test_incomplete
    test_missing_paren
    test_extra_paren

    # Flags

    test_H
    test_H_slash
    test_H_broken
    test_H_notdir
    test_H_loops

    test_L
    test_L_broken
    test_L_notdir
    test_L_loops

    test_flag_weird_names
    test_flag_comma

    # Primaries

    test_depth
    test_depth_slash
    test_depth_error
    test_L_depth

    test_exec
    test_exec_plus
    test_exec_plus_status
    test_exec_plus_semicolon

    test_group_name
    test_group_id
    test_group_nogroup

    test_links
    test_links_plus
    test_links_minus

    test_name
    test_name_root
    test_name_root_depth
    test_name_trailing_slash

    test_newer
    test_newer_link

    test_nogroup
    test_nogroup_ulimit

    test_nouser
    test_nouser_ulimit

    test_ok_stdin
    test_ok_plus_semicolon

    test_path

    test_perm_000
    test_perm_000_minus
    test_perm_222
    test_perm_222_minus
    test_perm_644
    test_perm_644_minus
    test_perm_symbolic
    test_perm_symbolic_minus
    test_perm_leading_plus_symbolic_minus
    test_permcopy
    test_perm_setid
    test_perm_sticky

    test_prune
    test_prune_or_print
    test_not_prune

    test_size
    test_size_plus
    test_size_bytes

    test_type_d
    test_type_f
    test_type_l
    test_H_type_l
    test_L_type_l

    test_user_name
    test_user_id
    test_user_nouser

    # Closed file descriptors
    test_closed_stdin
    test_closed_stdout
    test_closed_stderr

    # PATH_MAX handling
    test_deep

    # Optimizer tests
    test_or_purity
    test_double_negation
    test_de_morgan_not
    test_de_morgan_and
    test_de_morgan_or
    test_data_flow_group
    test_data_flow_user
    test_data_flow_type
    test_data_flow_and_swap
    test_data_flow_or_swap
)

bsd_tests=(
    # Flags

    test_E

    test_P
    test_P_slash

    test_X

    test_d_path

    test_f

    test_s

    test_double_dash
    test_flag_double_dash

    # Primaries

    test_acl
    test_L_acl

    test_anewer
    test_asince

    test_delete
    test_delete_many

    test_depth_maxdepth_1
    test_depth_maxdepth_2
    test_depth_mindepth_1
    test_depth_mindepth_2

    test_depth_n
    test_depth_n_plus
    test_depth_n_minus
    test_depth_depth_n
    test_depth_depth_n_plus
    test_depth_depth_n_minus
    test_depth_overflow
    test_data_flow_depth

    test_exec_substring

    test_execdir_pwd
    test_execdir_slash
    test_execdir_slash_pwd
    test_execdir_slashes
    test_execdir_ulimit

    test_exit

    test_flags

    test_follow

    test_gid_name

    test_ilname
    test_L_ilname

    test_iname

    test_inum

    test_ipath

    test_iregex

    test_lname
    test_L_lname

    test_ls
    test_L_ls

    test_maxdepth

    test_mindepth

    test_mnewer
    test_H_mnewer

    test_msince

    test_mtime_units

    test_name_slash
    test_name_slashes

    test_H_newer

    test_newerma
    test_newermt
    test_newermt_epoch_minus_one

    test_ok_stdin
    test_ok_closed_stdin

    test_okdir_stdin
    test_okdir_closed_stdin

    test_perm_000_plus
    test_perm_222_plus
    test_perm_644_plus

    test_printx

    test_quit
    test_quit_child
    test_quit_depth
    test_quit_depth_child
    test_quit_after_print
    test_quit_before_print
    test_quit_implicit_print

    test_rm

    test_regex
    test_regex_parens

    test_samefile
    test_samefile_symlink
    test_H_samefile_symlink
    test_L_samefile_symlink
    test_samefile_broken
    test_H_samefile_broken
    test_L_samefile_broken
    test_samefile_notdir
    test_H_samefile_notdir
    test_L_samefile_notdir

    test_size_T
    test_size_big

    test_uid_name

    # Optimizer tests
    test_data_flow_sparse
)

gnu_tests=(
    # General parsing

    test_not
    test_and
    test_or
    test_comma
    test_precedence

    test_follow_comma

    # Flags

    test_P
    test_P_slash

    test_L_loops_continue

    test_double_dash
    test_flag_double_dash

    # Primaries

    test_anewer

    test_path_d

    test_daystart
    test_daystart_twice

    test_delete
    test_delete_many
    test_L_delete

    test_depth_mindepth_1
    test_depth_mindepth_2
    test_depth_maxdepth_1
    test_depth_maxdepth_2

    test_empty
    test_empty_special

    test_exec_nothing
    test_exec_substring

    test_execdir
    test_execdir_substring
    test_execdir_plus_semicolon
    test_execdir_pwd
    test_execdir_slash
    test_execdir_slash_pwd
    test_execdir_slashes
    test_execdir_ulimit

    test_executable

    test_false

    test_files0_from_file
    test_files0_from_stdin
    test_files0_from_none
    test_files0_from_empty
    test_files0_from_nowhere
    test_files0_from_nothing
    test_files0_from_ok

    test_fls

    test_follow

    test_fprint
    test_fprint_duplicate
    test_fprint_error
    test_fprint_noerror
    test_fprint_noarg
    test_fprint_nonexistent
    test_fprint_truncate

    test_fprint0

    test_fprintf
    test_fprintf_nofile
    test_fprintf_noformat

    test_fstype

    test_gid
    test_gid_plus
    test_gid_plus_plus
    test_gid_minus
    test_gid_minus_plus

    test_ignore_readdir_race
    test_ignore_readdir_race_root
    test_ignore_readdir_race_notdir

    test_ilname
    test_L_ilname

    test_iname

    test_inum

    test_ipath

    test_iregex

    test_lname
    test_L_lname

    test_ls
    test_L_ls

    test_maxdepth

    test_mindepth

    test_name_slash
    test_name_slashes

    test_H_newer

    test_newerma
    test_newermt
    test_newermt_epoch_minus_one

    test_ok_closed_stdin
    test_ok_nothing

    test_okdir_closed_stdin
    test_okdir_plus_semicolon

    test_perm_000_slash
    test_perm_222_slash
    test_perm_644_slash
    test_perm_symbolic_slash
    test_perm_leading_plus_symbolic_slash

    test_print_error

    test_print0

    test_printf
    test_printf_empty
    test_printf_slash
    test_printf_slashes
    test_printf_trailing_slash
    test_printf_trailing_slashes
    test_printf_flags
    test_printf_types
    test_printf_escapes
    test_printf_times
    test_printf_leak
    test_printf_nul
    test_printf_Y_error
    test_printf_H
    test_printf_u_g_ulimit
    test_printf_l_nonlink

    test_quit
    test_quit_child
    test_quit_depth
    test_quit_depth_child
    test_quit_after_print
    test_quit_before_print

    test_readable

    test_regex
    test_regex_parens
    test_regex_error

    test_regextype_posix_basic
    test_regextype_posix_extended
    test_regextype_ed
    test_regextype_sed

    test_samefile
    test_samefile_symlink
    test_H_samefile_symlink
    test_L_samefile_symlink
    test_samefile_broken
    test_H_samefile_broken
    test_L_samefile_broken
    test_samefile_notdir
    test_H_samefile_notdir
    test_L_samefile_notdir

    test_size_big

    test_true

    test_uid
    test_uid_plus
    test_uid_plus_plus
    test_uid_minus
    test_uid_minus_plus

    test_writable

    test_xtype_l
    test_xtype_f
    test_L_xtype_l
    test_L_xtype_f

    # Optimizer tests
    test_and_purity
    test_not_reachability
    test_comma_reachability
    test_and_false_or_true
    test_comma_redundant_true
    test_comma_redundant_false
)

bfs_tests=(
    # General parsing
    test_path_flag_expr
    test_path_expr_flag
    test_flag_expr_path
    test_expr_flag_path
    test_expr_path_flag

    test_unexpected_operator

    test_typo

    # Flags

    test_D_multi
    test_D_all

    test_O0
    test_O1
    test_O2
    test_O3
    test_Ofast

    test_S_bfs
    test_S_dfs
    test_S_ids

    # Special forms

    test_exclude_name
    test_exclude_depth
    test_exclude_mindepth
    test_exclude_print
    test_exclude_exclude

    # Primaries

    test_color
    test_color_L
    test_color_rs_lc_rc_ec
    test_color_escapes
    test_color_nul
    test_color_ln_target
    test_color_L_ln_target
    test_color_mh
    test_color_mh0
    test_color_or
    test_color_mi
    test_color_or_mi
    test_color_or_mi0
    test_color_or0_mi
    test_color_or0_mi0
    test_color_su_sg0
    test_color_su0_sg
    test_color_su0_sg0
    test_color_st_tw_ow0
    test_color_st_tw0_ow
    test_color_st_tw0_ow0
    test_color_st0_tw_ow
    test_color_st0_tw_ow0
    test_color_st0_tw0_ow
    test_color_st0_tw0_ow0
    test_color_ext
    test_color_ext0
    test_color_ext_override
    test_color_ext_underride
    test_color_missing_colon
    test_color_no_stat
    test_color_L_no_stat
    test_color_star
    test_color_ls

    test_execdir_plus

    test_fprint_duplicate_stdout
    test_fprint_error_stdout
    test_fprint_error_stderr

    test_help

    test_hidden
    test_hidden_root

    test_links_noarg
    test_links_empty
    test_links_negative
    test_links_invalid

    test_newerma_nonexistent
    test_newermt_invalid
    test_newermq
    test_newerqm

    test_nohidden
    test_nohidden_depth

    test_perm_symbolic_trailing_comma
    test_perm_symbolic_double_comma
    test_perm_symbolic_missing_action
    test_perm_leading_plus_symbolic

    test_printf_w
    test_printf_incomplete_escape
    test_printf_invalid_escape
    test_printf_incomplete_format
    test_printf_invalid_format
    test_printf_duplicate_flag
    test_printf_must_be_numeric
    test_printf_color

    test_type_multi

    test_unique
    test_unique_depth
    test_L_unique
    test_L_unique_loops
    test_L_unique_depth

    test_version

    test_xtype_multi

    # Optimizer tests
    test_data_flow_hidden
    test_xtype_reorder
    test_xtype_depth

    # PATH_MAX handling
    test_deep_strict

    # Error handling
    test_stderr_fails_silently
    test_stderr_fails_loudly
)

sudo_tests=(
    test_capable
    test_L_capable

    test_mount
    test_L_mount
    test_xdev
    test_L_xdev

    test_inum_mount
    test_inum_bind_mount
    test_type_bind_mount
    test_xtype_bind_mount
)

case "$UNAME" in
    Darwin|FreeBSD)
        bsd_tests+=(
            test_xattr
            test_L_xattr

            test_xattrname
            test_L_xattrname
        )
        ;;
    *)
        sudo_tests+=(
            test_xattr
            test_L_xattr

            test_xattrname
            test_L_xattrname
        )
        ;;
esac

if [ "$DEFAULT" ]; then
    POSIX=yes
    BSD=yes
    GNU=yes
    ALL=yes
fi

if [ ! "$EXPLICIT" ]; then
    [ "$POSIX" ] && enabled_tests+=("${posix_tests[@]}")
    [ "$BSD" ] && enabled_tests+=("${bsd_tests[@]}")
    [ "$GNU" ] && enabled_tests+=("${gnu_tests[@]}")
    [ "$ALL" ] && enabled_tests+=("${bfs_tests[@]}")
    [ "$SUDO" ] && enabled_tests+=("${sudo_tests[@]}")
fi

eval enabled_tests=($(printf '%q\n' "${enabled_tests[@]}" | sort -u))

function _realpath() {
    (
        set -P
        cd "$(dirname -- "$1")"
        echo "$PWD/$(basename -- "$1")"
    )
}

ROOT="$(dirname -- "${BASH_SOURCE[0]}")"

# Try to resolve the path to $BFS before we cd, while also supporting
# --bfs="./bfs -S ids"
BFS=(${BFS:-$ROOT/bfs})
BFS[0]="$(_realpath "$(command -v "${BFS[0]}")")"
BFS="${BFS[*]}"

TESTS="$(_realpath "$ROOT/tests")"

# The temporary directory that will hold our test data
TMP="$(mktemp -d "${TMPDIR:-/tmp}"/bfs.XXXXXXXXXX)"
chown "$(id -u):$(id -g)" "$TMP"

# Clean up temporary directories on exit
function cleanup() {
    # Don't force rm to deal with long paths
    for dir in "$TMP"/deep/*/*; do
        if [ -d "$dir" ]; then
            (cd "$dir" && rm -rf *)
        fi
    done

    # In case a test left anything weird in scratch/
    if [ -e "$TMP"/scratch ]; then
        chmod -R +rX "$TMP"/scratch
    fi

    rm -rf "$TMP"
}

if [ "$CLEAN" ]; then
    trap cleanup EXIT
else
    echo "Test files saved to $TMP"
fi

# Install a file, creating any parent directories
function installp() {
    local target="${@: -1}"
    mkdir -p "${target%/*}"
    install "$@"
}

# Prefer GNU touch to work around https://apple.stackexchange.com/a/425730/397839
if command -v gtouch &>/dev/null; then
    TOUCH=gtouch
else
    TOUCH=touch
fi

# Like a mythical touch -p
function touchp() {
    for arg; do
        installp -m644 /dev/null "$arg"
    done
}

# Creates a simple file+directory structure for tests
function make_basic() {
    touchp "$1/a"
    touchp "$1/b"
    touchp "$1/c/d"
    touchp "$1/e/f"
    mkdir -p "$1/g/h"
    mkdir -p "$1/i"
    touchp "$1/j/foo"
    touchp "$1/k/foo/bar"
    touchp "$1/l/foo/bar/baz"
    echo baz >"$1/l/foo/bar/baz"
}
make_basic "$TMP/basic"

# Creates a file+directory structure with various permissions for tests
function make_perms() {
    installp -m000 /dev/null "$1/0"
    installp -m444 /dev/null "$1/r"
    installp -m222 /dev/null "$1/w"
    installp -m644 /dev/null "$1/rw"
    installp -m555 /dev/null "$1/rx"
    installp -m311 /dev/null "$1/wx"
    installp -m755 /dev/null "$1/rwx"
}
make_perms "$TMP/perms"

# Creates a file+directory structure with various symbolic and hard links
function make_links() {
    touchp "$1/file"
    ln -s file "$1/symlink"
    ln "$1/file" "$1/hardlink"
    ln -s nowhere "$1/broken"
    ln -s symlink/file "$1/notdir"
    mkdir -p "$1/deeply/nested/dir"
    touchp "$1/deeply/nested/file"
    ln -s file "$1/deeply/nested/link"
    ln -s nowhere "$1/deeply/nested/broken"
    ln -s deeply/nested "$1/skip"
}
make_links "$TMP/links"

# Creates a file+directory structure with symbolic link loops
function make_loops() {
    touchp "$1/file"
    ln -s file "$1/symlink"
    ln -s nowhere "$1/broken"
    ln -s symlink/file "$1/notdir"
    ln -s loop "$1/loop"
    mkdir -p "$1/deeply/nested/dir"
    ln -s ../../deeply "$1/deeply/nested/loop"
    ln -s deeply/nested/loop/nested "$1/skip"
}
make_loops "$TMP/loops"

# Creates a file+directory structure with varying timestamps
function make_times() {
    mkdir -p "$1"
    $TOUCH -t 199112140000 "$1/a"
    $TOUCH -t 199112140001 "$1/b"
    $TOUCH -t 199112140002 "$1/c"
    ln -s a "$1/l"
    $TOUCH -h -t 199112140003 "$1/l"
    $TOUCH -t 199112140004 "$1"
}
make_times "$TMP/times"

# Creates a file+directory structure with various weird file/directory names
function make_weirdnames() {
    touchp "$1/-/a"
    touchp "$1/(/b"
    touchp "$1/(-/c"
    touchp "$1/!/d"
    touchp "$1/!-/e"
    touchp "$1/,/f"
    touchp "$1/)/g"
    touchp "$1/.../h"
    touchp "$1/\\/i"
    touchp "$1/ /j"
}
make_weirdnames "$TMP/weirdnames"

# Creates a very deep directory structure for testing PATH_MAX handling
function make_deep() {
    mkdir -p "$1"

    # $name will be 255 characters, aka _XOPEN_NAME_MAX
    local name="0123456789ABCDEF"
    name="${name}${name}${name}${name}"
    name="${name}${name}${name}${name}"
    name="${name:0:255}"

    for i in {0..9} A B C D E F; do
        (
            mkdir "$1/$i"
            cd "$1/$i"

            # 16 * 256 == 4096 == PATH_MAX
            for j in {1..16}; do
                mkdir "$name"
                cd "$name" 2>/dev/null
            done

            $TOUCH "$name"
        )
    done
}
make_deep "$TMP/deep"

# Creates a directory structure with many different types, and therefore colors
function make_rainbow() {
    touchp "$1/file.txt"
    touchp "$1/file.dat"
    touchp "$1/star".{gz,tar,tar.gz}
    ln -s file.txt "$1/link.txt"
    touchp "$1/mh1"
    ln "$1/mh1" "$1/mh2"
    mkfifo "$1/pipe"
    # TODO: block
    ln -s /dev/null "$1/chardev_link"
    ln -s nowhere "$1/broken"
    "$TESTS/mksock" "$1/socket"
    touchp "$1"/s{u,g,ug}id
    chmod u+s "$1"/su{,g}id
    chmod g+s "$1"/s{u,}gid
    mkdir "$1/ow" "$1"/sticky{,_ow}
    chmod o+w "$1"/*ow
    chmod +t "$1"/sticky*
    touchp "$1"/exec.sh
    chmod +x "$1"/exec.sh
}
make_rainbow "$TMP/rainbow"

# Creates a scratch directory that tests can modify
function make_scratch() {
    mkdir -p "$1"
}
make_scratch "$TMP/scratch"

function bfs_sort() {
    awk -F/ '{ print NF - 1 " " $0 }' | sort -n | cut -d' ' -f2-
}

# Close stdin so bfs doesn't think we're interactive
exec </dev/null

if [ "$VERBOSE" ]; then
    # dup stdout for verbose logging even when redirected
    exec 3>&1
fi

function bfs_verbose() {
    if [ "$VERBOSE" ]; then
        if [ -t 3 ]; then
            printf "${GRN}%q${RST} " $BFS >&3

            local expr_started=
            for arg; do
                if [[ $arg == -[A-Z]* ]]; then
                    printf "${CYN}%q${RST} " "$arg" >&3
                elif [[ $arg == [\(!] || $arg == -[ao] || $arg == -and || $arg == -or || $arg == -not ]]; then
                    expr_started=yes
                    printf "${RED}%q${RST} " "$arg" >&3
                elif [[ $expr_started && $arg == [\),] ]]; then
                    printf "${RED}%q${RST} " "$arg" >&3
                elif [[ $arg == -?* ]]; then
                    expr_started=yes
                    printf "${BLU}%q${RST} " "$arg" >&3
                elif [ "$expr_started" ]; then
                    printf "${BLD}%q${RST} " "$arg" >&3
                else
                    printf "${MAG}%q${RST} " "$arg" >&3
                fi
            done
        else
            printf '%q ' $BFS "$@" >&3
        fi
        printf '\n' >&3
    fi
}

function invoke_bfs() {
    bfs_verbose "$@"
    $BFS "$@"
}

# Silence stderr unless --verbose is set
function quiet() {
    if [ "$VERBOSE" ]; then
        "$@"
    else
        "$@" 2>/dev/null
    fi
}

# Expect a command to fail, but not crash
function fail() {
    "$@"
    local STATUS="$?"

    if ((STATUS > 125)); then
        return "$STATUS"
    elif ((STATUS)); then
        return 0
    else
        return 1
    fi
}

# Return value when bfs fails
EX_BFS=10
# Return value when a difference is detected
EX_DIFF=20

function bfs_diff() (
    bfs_verbose "$@"

    # Close the dup()'d stdout to make sure we have enough fd's for the process
    # substitution, even with low ulimit -n
    exec 3>&-

    local CALLER
    for CALLER in "${FUNCNAME[@]}"; do
        if [[ $CALLER == test_* ]]; then
            break
        fi
    done

    local EXPECTED="$TESTS/$CALLER.out"
    if [ "$UPDATE" ]; then
        local ACTUAL="$EXPECTED"
    else
        local ACTUAL="$TMP/$CALLER.out"
    fi

    $BFS "$@" | bfs_sort >"$ACTUAL"
    local STATUS="${PIPESTATUS[0]}"

    if [ ! "$UPDATE" ]; then
        diff -u "$EXPECTED" "$ACTUAL" || return $EX_DIFF
    fi

    if [ "$STATUS" -eq 0 ]; then
        return 0
    else
        return $EX_BFS
    fi
)

function closefrom() {
    if [ -d /proc/self/fd ]; then
        local fds=/proc/self/fd
    else
        local fds=/dev/fd
    fi

    for fd in "$fds"/*; do
        if [ ! -e "$fd" ]; then
            continue
        fi

        local fd="${fd##*/}"
        if [ "$fd" -ge "$1" ]; then
            eval "exec ${fd}<&-"
        fi
    done
}

function inum() {
    ls -id "$@" | awk '{ print $1 }'
}


cd "$TMP"
set +e

# Test cases

function test_basic() {
    bfs_diff basic
}

function test_type_d() {
    bfs_diff basic -type d
}

function test_type_f() {
    bfs_diff basic -type f
}

function test_type_l() {
    bfs_diff links/skip -type l
}

function test_H_type_l() {
    bfs_diff -H links/skip -type l
}

function test_L_type_l() {
    bfs_diff -L links/skip -type l
}

function test_type_multi() {
    bfs_diff links -type f,d,c
}

function test_mindepth() {
    bfs_diff basic -mindepth 1
}

function test_maxdepth() {
    bfs_diff basic -maxdepth 1
}

function test_depth() {
    bfs_diff basic -depth
}

function test_depth_slash() {
    bfs_diff basic/ -depth
}

function test_depth_mindepth_1() {
    bfs_diff basic -mindepth 1 -depth
}

function test_depth_mindepth_2() {
    bfs_diff basic -mindepth 2 -depth
}

function test_depth_maxdepth_1() {
    bfs_diff basic -maxdepth 1 -depth
}

function test_depth_maxdepth_2() {
    bfs_diff basic -maxdepth 2 -depth
}

function test_depth_error() {
    rm -rf scratch/*
    touchp scratch/foo/bar
    chmod -r scratch/foo

    quiet bfs_diff scratch -depth
    local ret=$?

    chmod +r scratch/foo
    rm -rf scratch/*

    [ $ret -eq $EX_BFS ]
}

function test_name() {
    bfs_diff basic -name '*f*'
}

function test_name_root() {
    bfs_diff basic/a -name a
}

function test_name_root_depth() {
    bfs_diff basic/g -depth -name g
}

function test_name_trailing_slash() {
    bfs_diff basic/g/ -name g
}

function test_name_slash() {
    bfs_diff / -maxdepth 0 -name /
}

function test_name_slashes() {
    bfs_diff /// -maxdepth 0 -name /
}

function test_path() {
    bfs_diff basic -path 'basic/*f*'
}

function test_true() {
    bfs_diff basic -true
}

function test_false() {
    bfs_diff basic -false
}

function test_executable() {
    bfs_diff perms -executable
}

function test_readable() {
    bfs_diff perms -readable
}

function test_writable() {
    bfs_diff perms -writable
}

function test_empty() {
    bfs_diff basic -empty
}

function test_empty_special() {
    bfs_diff rainbow -empty
}

function test_gid() {
    bfs_diff basic -gid "$(id -g)"
}

function test_gid_plus() {
    if [ "$(id -g)" -ne 0 ]; then
	bfs_diff basic -gid +0
    fi
}

function test_gid_plus_plus() {
    if [ "$(id -g)" -ne 0 ]; then
	bfs_diff basic -gid ++0
    fi
}

function test_gid_minus() {
    bfs_diff basic -gid "-$(($(id -g) + 1))"
}

function test_gid_minus_plus() {
    bfs_diff basic -gid "-+$(($(id -g) + 1))"
}

function test_uid() {
    bfs_diff basic -uid "$(id -u)"
}

function test_uid_plus() {
    if [ "$(id -u)" -ne 0 ]; then
	bfs_diff basic -uid +0
    fi
}

function test_uid_plus_plus() {
    if [ "$(id -u)" -ne 0 ]; then
	bfs_diff basic -uid ++0
    fi
}

function test_uid_minus() {
    bfs_diff basic -uid "-$(($(id -u) + 1))"
}

function test_uid_minus_plus() {
    bfs_diff basic -uid "-+$(($(id -u) + 1))"
}

function test_newer() {
    bfs_diff times -newer times/a
}

function test_newer_link() {
    bfs_diff times -newer times/l
}

function test_anewer() {
    bfs_diff times -anewer times/a
}

function test_asince() {
    bfs_diff times -asince 1991-12-14T00:01
}

function test_links() {
    bfs_diff links -type f -links 2
}

function test_links_plus() {
    bfs_diff links -type f -links +1
}

function test_links_minus() {
    bfs_diff links -type f -links -2
}

function test_links_noarg() {
    fail quiet invoke_bfs links -links
}

function test_links_empty() {
    fail quiet invoke_bfs links -links ''
}

function test_links_negative() {
    fail quiet invoke_bfs links -links +-1
}

function test_links_invalid() {
    fail quiet invoke_bfs links -links ASDF
}

function test_P() {
    bfs_diff -P links/deeply/nested/dir
}

function test_P_slash() {
    bfs_diff -P links/deeply/nested/dir/
}

function test_H() {
    bfs_diff -H links/deeply/nested/dir
}

function test_H_slash() {
    bfs_diff -H links/deeply/nested/dir/
}

function test_H_broken() {
    bfs_diff -H links/broken
}

function test_H_notdir() {
    bfs_diff -H links/notdir
}

function test_H_newer() {
    bfs_diff -H times -newer times/l
}

function test_H_loops() {
    bfs_diff -H loops/deeply/nested/loop
}

function test_L() {
    bfs_diff -L links
}

function test_L_broken() {
    bfs_diff -H links/broken
}

function test_L_notdir() {
    bfs_diff -H links/notdir
}

function test_L_loops() {
    # POSIX says it's okay to either stop or keep going on seeing a filesystem
    # loop, as long as a diagnostic is printed
    local errors="$(invoke_bfs -L loops 2>&1 >/dev/null)"
    [ -n "$errors" ]
}

function test_L_loops_continue() {
    quiet bfs_diff -L loops
    [ $? -eq $EX_BFS ]
}

function test_X() {
    quiet bfs_diff -X weirdnames
    [ $? -eq $EX_BFS ]
}

function test_follow() {
    bfs_diff links -follow
}

function test_L_depth() {
    bfs_diff -L links -depth
}

function test_samefile() {
    bfs_diff links -samefile links/file
}

function test_samefile_symlink() {
    bfs_diff links -samefile links/symlink
}

function test_H_samefile_symlink() {
    bfs_diff -H links -samefile links/symlink
}

function test_L_samefile_symlink() {
    bfs_diff -L links -samefile links/symlink
}

function test_samefile_broken() {
    bfs_diff links -samefile links/broken
}

function test_H_samefile_broken() {
    bfs_diff -H links -samefile links/broken
}

function test_L_samefile_broken() {
    bfs_diff -L links -samefile links/broken
}

function test_samefile_notdir() {
    bfs_diff links -samefile links/notdir
}

function test_H_samefile_notdir() {
    bfs_diff -H links -samefile links/notdir
}

function test_L_samefile_notdir() {
    bfs_diff -L links -samefile links/notdir
}

function test_xtype_l() {
    bfs_diff links -xtype l
}

function test_xtype_f() {
    bfs_diff links -xtype f
}

function test_L_xtype_l() {
    bfs_diff -L links -xtype l
}

function test_L_xtype_f() {
    bfs_diff -L links -xtype f
}

function test_xtype_multi() {
    bfs_diff links -xtype f,d,c
}

function test_xtype_reorder() {
    # Make sure -xtype is not reordered in front of anything -- if -xtype runs
    # before -links 100, it will report an ELOOP error
    bfs_diff loops -links 100 -xtype l
    invoke_bfs loops -links 100 -xtype l
}

function test_xtype_depth() {
    # Make sure -xtype is considered side-effecting for facts_when_impure
    fail quiet invoke_bfs loops -xtype l -depth 100
}

function test_iname() {
    bfs_diff basic -iname '*F*'
}

function test_ipath() {
    bfs_diff basic -ipath 'basic/*F*'
}

function test_lname() {
    bfs_diff links -lname '[aq]'
}

function test_ilname() {
    bfs_diff links -ilname '[AQ]'
}

function test_L_lname() {
    bfs_diff -L links -lname '[aq]'
}

function test_L_ilname() {
    bfs_diff -L links -ilname '[AQ]'
}

function test_user_name() {
    bfs_diff basic -user "$(id -un)"
}

function test_user_id() {
    bfs_diff basic -user "$(id -u)"
}

function test_user_nouser() {
    # Regression test: this was wrongly optimized to -false
    bfs_diff basic -user "$(id -u)" \! -nouser
}

function test_group_name() {
    bfs_diff basic -group "$(id -gn)"
}

function test_group_id() {
    bfs_diff basic -group "$(id -g)"
}

function test_group_nogroup() {
    # Regression test: this was wrongly optimized to -false
    bfs_diff basic -group "$(id -g)" \! -nogroup
}

function test_daystart() {
    bfs_diff basic -daystart -mtime 0
}

function test_daystart_twice() {
    bfs_diff basic -daystart -daystart -mtime 0
}

function test_newerma() {
    bfs_diff times -newerma times/a
}

function test_newermt() {
    bfs_diff times -newermt 1991-12-14T00:01
}

function test_newermt_epoch_minus_one() {
    bfs_diff times -newermt 1969-12-31T23:59:59Z
}

function test_newermt_invalid() {
    fail quiet invoke_bfs times -newermt not_a_date_time
}

function test_newerma_nonexistent() {
    fail quiet invoke_bfs times -newerma basic/nonexistent
}

function test_newermq() {
    fail quiet invoke_bfs times -newermq times/a
}

function test_newerqm() {
    fail quiet invoke_bfs times -newerqm times/a
}

function test_size() {
    bfs_diff basic -type f -size 0
}

function test_size_plus() {
    bfs_diff basic -type f -size +0
}

function test_size_bytes() {
    bfs_diff basic -type f -size +0c
}

function test_size_big() {
    bfs_diff basic -size 9223372036854775807
}

function test_exec() {
    bfs_diff basic -exec echo '{}' \;
}

function test_exec_nothing() {
    # Regression test: don't segfault on missing command
    fail quiet invoke_bfs basic -exec \;
}

function test_exec_plus() {
    bfs_diff basic -exec "$TESTS/sort-args.sh" '{}' +
}

function test_exec_plus_status() {
    # -exec ... {} + should always return true, but if the command fails, bfs
    # should exit with a non-zero status
    bfs_diff basic -exec false '{}' + -print
    (($? == EX_BFS))
}

function test_exec_plus_semicolon() {
    # POSIX says:
    #     Only a <plus-sign> that immediately follows an argument containing only the two characters "{}"
    #     shall punctuate the end of the primary expression. Other uses of the <plus-sign> shall not be
    #     treated as special.
    bfs_diff basic -exec echo foo '{}' bar + baz \;
}

function test_exec_substring() {
    bfs_diff basic -exec echo '-{}-' ';'
}

function test_execdir() {
    bfs_diff basic -execdir echo '{}' ';'
}

function test_execdir_plus() {
    if [[ "$BFS" != *"-S dfs"* ]]; then
        bfs_diff basic -execdir "$TESTS/sort-args.sh" '{}' +
    fi
}

function test_execdir_substring() {
    bfs_diff basic -execdir echo '-{}-' ';'
}

function test_execdir_plus_semicolon() {
    bfs_diff basic -execdir echo foo '{}' bar + baz \;
}

function test_execdir_pwd() {
    local TMP_REAL="$(cd "$TMP" && pwd)"
    local OFFSET="$((${#TMP_REAL} + 2))"
    bfs_diff basic -execdir bash -c "pwd | cut -b$OFFSET-" ';'
}

function test_execdir_slash() {
    # Don't prepend ./ for absolute paths in -execdir
    bfs_diff / -maxdepth 0 -execdir echo '{}' ';'
}

function test_execdir_slash_pwd() {
    bfs_diff / -maxdepth 0 -execdir pwd ';'
}

function test_execdir_slashes() {
    bfs_diff /// -maxdepth 0 -execdir echo '{}' ';'
}

function test_execdir_ulimit() {
    rm -rf scratch/*
    mkdir -p scratch/a/b/c/d/e/f/g/h/i/j/k/l/m/n/o/p/q/r/s/t/u/v/w/x/y/z
    mkdir -p scratch/a/b/c/d/e/f/g/h/i/j/k/l/m/0/1/2/3/4/5/6/7/8/9/A/B/C

    closefrom 4
    ulimit -n 13
    bfs_diff scratch -execdir echo '{}' ';'
}

function test_weird_names() {
    cd weirdnames
    bfs_diff '-' '(-' '!-' ',' ')' './(' './!' \( \! -print -o -print \)
}

function test_flag_weird_names() {
    cd weirdnames
    bfs_diff -L '-' '(-' '!-' ',' ')' './(' './!' \( \! -print -o -print \)
}

function test_flag_comma() {
    # , is a filename until a non-flag is seen
    cd weirdnames
    bfs_diff -L ',' -print
}

function test_follow_comma() {
    # , is an operator after a non-flag is seen
    cd weirdnames
    bfs_diff -follow ',' -print
}

function test_fprint() {
    invoke_bfs basic -fprint scratch/test_fprint.out
    sort -o scratch/test_fprint.out scratch/test_fprint.out

    if [ "$UPDATE" ]; then
        cp {scratch,"$TESTS"}/test_fprint.out
    else
        diff -u {"$TESTS",scratch}/test_fprint.out
    fi
}

function test_fprint_duplicate() {
    touchp scratch/test_fprint_duplicate.out
    ln scratch/test_fprint_duplicate.out scratch/test_fprint_duplicate.hard
    ln -s test_fprint_duplicate.out scratch/test_fprint_duplicate.soft

    invoke_bfs basic -fprint scratch/test_fprint_duplicate.out -fprint scratch/test_fprint_duplicate.hard -fprint scratch/test_fprint_duplicate.soft
    sort -o scratch/test_fprint_duplicate.out scratch/test_fprint_duplicate.out

    if [ "$UPDATE" ]; then
        cp {scratch,"$TESTS"}/test_fprint_duplicate.out
    else
        diff -u {"$TESTS",scratch}/test_fprint_duplicate.out
    fi
}

function test_fprint_duplicate_stdout() {
    touchp scratch/test_fprint_duplicate_stdout.out

    invoke_bfs basic -fprint scratch/test_fprint_duplicate_stdout.out -print >scratch/test_fprint_duplicate_stdout.out
    sort -o scratch/test_fprint_duplicate_stdout.out{,}

    if [ "$UPDATE" ]; then
        cp {scratch,"$TESTS"}/test_fprint_duplicate_stdout.out
    else
        diff -u {"$TESTS",scratch}/test_fprint_duplicate_stdout.out
    fi
}

function test_fprint_noarg() {
    fail quiet invoke_bfs basic -fprint
}

function test_fprint_nonexistent() {
    fail quiet invoke_bfs basic -fprint scratch/nonexistent/path
}

function test_fprint_truncate() {
    printf "basic\nbasic\n" >scratch/test_fprint_truncate.out

    invoke_bfs basic -maxdepth 0 -fprint scratch/test_fprint_truncate.out
    sort -o scratch/test_fprint_truncate.out scratch/test_fprint_truncate.out

    if [ "$UPDATE" ]; then
        cp {scratch,"$TESTS"}/test_fprint_truncate.out
    else
        diff -u {"$TESTS",scratch}/test_fprint_truncate.out
    fi
}

function test_double_dash() {
    cd basic
    bfs_diff -- . -type f
}

function test_flag_double_dash() {
    cd basic
    bfs_diff -L -- . -type f
}

function test_ignore_readdir_race() {
    rm -rf scratch/*
    $TOUCH scratch/{foo,bar}

    # -links 1 forces a stat() call, which will fail for the second file
    invoke_bfs scratch -mindepth 1 -ignore_readdir_race -links 1 -exec "$TESTS/remove-sibling.sh" '{}' ';'
}

function test_ignore_readdir_race_root() {
    # Make sure -ignore_readdir_race doesn't suppress ENOENT at the root
    fail quiet invoke_bfs basic/nonexistent -ignore_readdir_race
}

function test_ignore_readdir_race_notdir() {
    # Check -ignore_readdir_race handling when a directory is replaced with a file
    rm -rf scratch/*
    touchp scratch/foo/bar

    invoke_bfs scratch -mindepth 1 -ignore_readdir_race -execdir rm -r '{}' \; -execdir $TOUCH '{}' \;
}

function test_perm_000() {
    bfs_diff perms -perm 000
}

function test_perm_000_minus() {
    bfs_diff perms -perm -000
}

function test_perm_000_slash() {
    bfs_diff perms -perm /000
}

function test_perm_000_plus() {
    bfs_diff perms -perm +000
}

function test_perm_222() {
    bfs_diff perms -perm 222
}

function test_perm_222_minus() {
    bfs_diff perms -perm -222
}

function test_perm_222_slash() {
    bfs_diff perms -perm /222
}

function test_perm_222_plus() {
    bfs_diff perms -perm +222
}

function test_perm_644() {
    bfs_diff perms -perm 644
}

function test_perm_644_minus() {
    bfs_diff perms -perm -644
}

function test_perm_644_slash() {
    bfs_diff perms -perm /644
}

function test_perm_644_plus() {
    bfs_diff perms -perm +644
}

function test_perm_symbolic() {
    bfs_diff perms -perm a+r,u=wX,g+wX-w
}

function test_perm_symbolic_minus() {
    bfs_diff perms -perm -a+r,u=wX,g+wX-w
}

function test_perm_symbolic_slash() {
    bfs_diff perms -perm /a+r,u=wX,g+wX-w
}

function test_perm_symbolic_trailing_comma() {
    fail quiet invoke_bfs perms -perm a+r,
}

function test_perm_symbolic_double_comma() {
    fail quiet invoke_bfs perms -perm a+r,,u+w
}

function test_perm_symbolic_missing_action() {
    fail quiet invoke_bfs perms -perm a
}

function test_perm_leading_plus_symbolic() {
    bfs_diff perms -perm +rwx
}

function test_perm_leading_plus_symbolic_minus() {
    bfs_diff perms -perm -+rwx
}

function test_perm_leading_plus_symbolic_slash() {
    bfs_diff perms -perm /+rwx
}

function test_permcopy() {
    bfs_diff perms -perm u+rw,g+u-w,o=g
}

function test_perm_setid() {
    bfs_diff rainbow -perm -u+s -o -perm -g+s
}

function test_perm_sticky() {
    bfs_diff rainbow -perm -a+t
}

function test_prune() {
    bfs_diff basic -name foo -prune
}

function test_prune_or_print() {
    bfs_diff basic -name foo -prune -o -print
}

function test_not_prune() {
    bfs_diff basic \! \( -name foo -prune \)
}

function test_ok_nothing() {
    # Regression test: don't segfault on missing command
    fail quiet invoke_bfs basic -ok \;
}

function test_ok_stdin() {
    # -ok should *not* close stdin
    # See https://savannah.gnu.org/bugs/?24561
    yes | quiet bfs_diff basic -ok bash -c 'printf "%s? " "$1" && head -n1' bash '{}' \;
}

function test_okdir_stdin() {
    # -okdir should *not* close stdin
    yes | quiet bfs_diff basic -okdir bash -c 'printf "%s? " "$1" && head -n1' bash '{}' \;
}

function test_ok_plus_semicolon() {
    yes | quiet bfs_diff basic -ok echo '{}' + \;
}

function test_okdir_plus_semicolon() {
    yes | quiet bfs_diff basic -okdir echo '{}' + \;
}

function test_delete() {
    rm -rf scratch/*
    touchp scratch/foo/bar/baz

    # Don't try to delete '.'
    (cd scratch && invoke_bfs . -delete)

    bfs_diff scratch
}

function test_delete_many() {
    # Test for https://github.com/tavianator/bfs/issues/67

    rm -rf scratch/*
    mkdir scratch/foo
    $TOUCH scratch/foo/{1..256}

    invoke_bfs scratch/foo -delete
    bfs_diff scratch
}

function test_L_delete() {
    rm -rf scratch/*
    mkdir scratch/foo
    mkdir scratch/bar
    ln -s ../foo scratch/bar/baz

    # Don't try to rmdir() a symlink
    invoke_bfs -L scratch/bar -delete || return 1

    bfs_diff scratch
}

function test_rm() {
    rm -rf scratch/*
    touchp scratch/foo/bar/baz

    (cd scratch && invoke_bfs . -rm)

    bfs_diff scratch
}

function test_regex() {
    bfs_diff basic -regex 'basic/./.'
}

function test_iregex() {
    bfs_diff basic -iregex 'basic/[A-Z]/[a-z]'
}

function test_regex_parens() {
    cd weirdnames
    bfs_diff . -regex '\./\((\)'
}

function test_regex_error() {
    fail quiet invoke_bfs basic -regex '['
}

function test_E() {
    cd weirdnames
    bfs_diff -E . -regex '\./(\()'
}

function test_regextype_posix_basic() {
    cd weirdnames
    bfs_diff -regextype posix-basic -regex '\./\((\)'
}

function test_regextype_posix_extended() {
    cd weirdnames
    bfs_diff -regextype posix-extended -regex '\./(\()'
}

function test_regextype_ed() {
    cd weirdnames
    bfs_diff -regextype ed -regex '\./\((\)'
}

function test_regextype_sed() {
    cd weirdnames
    bfs_diff -regextype sed -regex '\./\((\)'
}

function test_d_path() {
    bfs_diff -d basic
}

function test_path_d() {
    bfs_diff basic -d
}

function test_f() {
    cd weirdnames
    bfs_diff -f '-' -f '('
}

function test_s() {
    invoke_bfs -s weirdnames -maxdepth 1 >"$TMP/test_s.out"

    if [ "$UPDATE" ]; then
        cp {"$TMP","$TESTS"}/test_s.out
    else
        diff -u {"$TESTS","$TMP"}/test_s.out
    fi
}

function test_hidden() {
    bfs_diff weirdnames -hidden
}

function test_hidden_root() {
    cd weirdnames
    bfs_diff . ./. ... ./... .../.. -hidden
}

function test_nohidden() {
    bfs_diff weirdnames -nohidden
}

function test_nohidden_depth() {
    bfs_diff weirdnames -depth -nohidden
}

function test_depth_n() {
    bfs_diff basic -depth 2
}

function test_depth_n_plus() {
    bfs_diff basic -depth +2
}

function test_depth_n_minus() {
    bfs_diff basic -depth -2
}

function test_depth_depth_n() {
    bfs_diff basic -depth -depth 2
}

function test_depth_depth_n_plus() {
    bfs_diff basic -depth -depth +2
}

function test_depth_depth_n_minus() {
    bfs_diff basic -depth -depth -2
}

function test_depth_overflow() {
    bfs_diff basic -depth -4294967296
}

function test_gid_name() {
    bfs_diff basic -gid "$(id -gn)"
}

function test_uid_name() {
    bfs_diff basic -uid "$(id -un)"
}

function test_mnewer() {
    bfs_diff times -mnewer times/a
}

function test_H_mnewer() {
    bfs_diff -H times -mnewer times/l
}

function test_msince() {
    bfs_diff times -msince 1991-12-14T00:01
}

function test_mtime_units() {
    bfs_diff times -mtime +500w400d300h200m100s
}

function test_size_T() {
    bfs_diff basic -type f -size 1T
}

function test_quit() {
    bfs_diff basic/g -print -name g -quit
}

function test_quit_child() {
    bfs_diff basic/g -print -name h -quit
}

function test_quit_depth() {
    bfs_diff basic/g -depth -print -name g -quit
}

function test_quit_depth_child() {
    bfs_diff basic/g -depth -print -name h -quit
}

function test_quit_after_print() {
    bfs_diff basic basic -print -quit
}

function test_quit_before_print() {
    bfs_diff basic basic -quit -print
}

function test_quit_implicit_print() {
    bfs_diff basic -name basic -o -quit
}

function test_inum() {
    bfs_diff basic -inum "$(inum basic/k/foo/bar)"
}

function test_nogroup() {
    bfs_diff basic -nogroup
}

function test_nogroup_ulimit() {
    closefrom 4
    ulimit -n 16
    bfs_diff deep -nogroup
}

function test_nouser() {
    bfs_diff basic -nouser
}

function test_nouser_ulimit() {
    closefrom 4
    ulimit -n 16
    bfs_diff deep -nouser
}

function test_ls() {
    invoke_bfs rainbow -ls >scratch/test_ls.out
}

function test_L_ls() {
    invoke_bfs -L rainbow -ls >scratch/test_L_ls.out
}

function test_fls() {
    invoke_bfs rainbow -fls scratch/test_fls.out
}

function test_printf() {
    bfs_diff basic -printf '%%p(%p) %%d(%d) %%f(%f) %%h(%h) %%H(%H) %%P(%P) %%m(%m) %%M(%M) %%y(%y)\n'
}

function test_printf_empty() {
    bfs_diff basic -printf ''
}

function test_printf_slash() {
    bfs_diff / -maxdepth 0 -printf '(%h)/(%f)\n'
}

function test_printf_slashes() {
    bfs_diff /// -maxdepth 0 -printf '(%h)/(%f)\n'
}

function test_printf_trailing_slash() {
    bfs_diff basic/ -printf '(%h)/(%f)\n'
}

function test_printf_trailing_slashes() {
    bfs_diff basic/// -printf '(%h)/(%f)\n'
}

function test_printf_flags() {
    bfs_diff basic -printf '|%- 10.10p| %+03d %#4m\n'
}

function test_printf_types() {
    bfs_diff loops -printf '(%p) (%l) %y %Y\n'
}

function test_printf_escapes() {
    bfs_diff basic -maxdepth 0 -printf '\18\118\1118\11118\n\cfoo'
}

function test_printf_times() {
    bfs_diff times -type f -printf '%p | %a %AY-%Am-%Ad %AH:%AI:%AS %T@ | %t %TY-%Tm-%Td %TH:%TI:%TS %T@\n'
}

function test_printf_leak() {
    # Memory leak regression test
    bfs_diff basic -maxdepth 0 -printf '%p'
}

function test_printf_nul() {
    # NUL byte regression test
    local EXPECTED="$TESTS/${FUNCNAME[0]}.out"
    if [ "$UPDATE" ]; then
        local ACTUAL="$EXPECTED"
    else
        local ACTUAL="$TMP/${FUNCNAME[0]}.out"
    fi

    invoke_bfs basic -maxdepth 0 -printf '%h\0%f\n' >"$ACTUAL"

    if [ ! "$UPDATE" ]; then
        diff -u "$EXPECTED" "$ACTUAL"
    fi
}

function test_printf_w() {
    # Birth times may not be supported, so just check that %w/%W/%B can be parsed
    bfs_diff times -false -printf '%w %WY %BY\n'
}

function test_printf_Y_error() {
    rm -rf scratch/*
    mkdir scratch/foo
    chmod -x scratch/foo
    ln -s foo/bar scratch/bar

    quiet bfs_diff scratch -printf '(%p) (%l) %y %Y\n'
    local ret=$?

    chmod +x scratch/foo
    rm -rf scratch/*

    [ $ret -eq $EX_BFS ]
}

function test_printf_H() {
    bfs_diff basic links -printf '%%p(%p) %%d(%d) %%f(%f) %%h(%h) %%H(%H) %%P(%P) %%y(%y)\n'
}

function test_printf_u_g_ulimit() {
    closefrom 4
    ulimit -n 16
    [ "$(invoke_bfs deep -printf '%u %g\n' | uniq)" = "$(id -un) $(id -gn)" ]
}

function test_printf_l_nonlink() {
    bfs_diff links -printf '| %26p -> %-26l |\n'
}

function test_printf_incomplete_escape() {
    fail quiet invoke_bfs basic -printf '\'
}

function test_printf_invalid_escape() {
    fail quiet invoke_bfs basic -printf '\!'
}

function test_printf_incomplete_format() {
    fail quiet invoke_bfs basic -printf '%'
}

function test_printf_invalid_format() {
    fail quiet invoke_bfs basic -printf '%!'
}

function test_printf_duplicate_flag() {
    fail quiet invoke_bfs basic -printf '%--p'
}

function test_printf_must_be_numeric() {
    fail quiet invoke_bfs basic -printf '%+p'
}

function test_printf_color() {
    LS_COLORS= bfs_diff -color -path './rainbow*' -printf '%H %h %f %p %P %l\n'
}

function test_fprintf() {
    invoke_bfs basic -fprintf scratch/test_fprintf.out '%%p(%p) %%d(%d) %%f(%f) %%h(%h) %%H(%H) %%P(%P) %%m(%m) %%M(%M) %%y(%y)\n'
    sort -o scratch/test_fprintf.out scratch/test_fprintf.out

    if [ "$UPDATE" ]; then
        cp scratch/test_fprintf.out "$TESTS/test_fprintf.out"
    else
        diff -u "$TESTS/test_fprintf.out" scratch/test_fprintf.out
    fi
}

function test_fprintf_nofile() {
    fail quiet invoke_bfs basic -fprintf
}

function test_fprintf_noformat() {
    fail quiet invoke_bfs basic -fprintf /dev/null
}

function test_fstype() {
    fstype="$(invoke_bfs basic -maxdepth 0 -printf '%F\n')"
    bfs_diff basic -fstype "$fstype"
}

function test_path_flag_expr() {
    bfs_diff links/skip -H -type l
}

function test_path_expr_flag() {
    bfs_diff links/skip -type l -H
}

function test_flag_expr_path() {
    bfs_diff -H -type l links/skip
}

function test_expr_flag_path() {
    bfs_diff -type l -H links/skip
}

function test_expr_path_flag() {
    bfs_diff -type l links/skip -H
}

function test_parens() {
    bfs_diff basic \( -name '*f*' \)
}

function test_bang() {
    bfs_diff basic \! -name foo
}

function test_not() {
    bfs_diff basic -not -name foo
}

function test_implicit_and() {
    bfs_diff basic -name foo -type d
}

function test_a() {
    bfs_diff basic -name foo -a -type d
}

function test_and() {
    bfs_diff basic -name foo -and -type d
}

function test_o() {
    bfs_diff basic -name foo -o -type d
}

function test_or() {
    bfs_diff basic -name foo -or -type d
}

function test_comma() {
    bfs_diff basic -name '*f*' -print , -print
}

function test_precedence() {
    bfs_diff basic \( -name foo -type d -o -name bar -a -type f \) -print , \! -empty -type f -print
}

function test_incomplete() {
    fail quiet invoke_bfs basic \(
}

function test_missing_paren() {
    fail quiet invoke_bfs basic \( -print
}

function test_extra_paren() {
    fail quiet invoke_bfs basic -print \)
}

function test_color() {
    LS_COLORS= bfs_diff rainbow -color
}

function test_color_L() {
    LS_COLORS= bfs_diff -L rainbow -color
}

function test_color_rs_lc_rc_ec() {
    LS_COLORS="rs=RS:lc=LC:rc=RC:ec=EC:" bfs_diff rainbow -color
}

function test_color_escapes() {
    LS_COLORS="lc=\e[:rc=\155\::ec=^[\x5B\x6d:" bfs_diff rainbow -color
}

function test_color_nul() {
    local EXPECTED="$TESTS/${FUNCNAME[0]}.out"
    if [ "$UPDATE" ]; then
        local ACTUAL="$EXPECTED"
    else
        local ACTUAL="$TMP/${FUNCNAME[0]}.out"
    fi

    LS_COLORS="ec=\33[m\0:" invoke_bfs rainbow -color -maxdepth 0 >"$ACTUAL"

    if [ ! "$UPDATE" ]; then
        diff -u "$EXPECTED" "$ACTUAL"
    fi
}

function test_color_ln_target() {
    LS_COLORS="ln=target:or=01;31:mi=01;33:" bfs_diff rainbow -color
}

function test_color_L_ln_target() {
    LS_COLORS="ln=target:or=01;31:mi=01;33:" bfs_diff -L rainbow -color
}

function test_color_mh() {
    LS_COLORS="mh=01:" bfs_diff rainbow -color
}

function test_color_mh0() {
    LS_COLORS="mh=00:" bfs_diff rainbow -color
}

function test_color_or() {
    LS_COLORS="or=01:" bfs_diff rainbow -color
}

function test_color_mi() {
    LS_COLORS="mi=01:" bfs_diff rainbow -color
}

function test_color_or_mi() {
    LS_COLORS="or=01;31:mi=01;33:" bfs_diff rainbow -color
}

function test_color_or_mi0() {
    LS_COLORS="or=01;31:mi=00:" bfs_diff rainbow -color
}

function test_color_or0_mi() {
    LS_COLORS="or=00:mi=01;33:" bfs_diff rainbow -color
}

function test_color_or0_mi0() {
    LS_COLORS="or=00:mi=00:" bfs_diff rainbow -color
}

function test_color_su_sg0() {
    LS_COLORS="su=37;41:sg=00:" bfs_diff rainbow -color
}

function test_color_su0_sg() {
    LS_COLORS="su=00:sg=30;43:" bfs_diff rainbow -color
}

function test_color_su0_sg0() {
    LS_COLORS="su=00:sg=00:" bfs_diff rainbow -color
}

function test_color_st_tw_ow0() {
    LS_COLORS="st=37;44:tw=40;32:ow=00:" bfs_diff rainbow -color
}

function test_color_st_tw0_ow() {
    LS_COLORS="st=37;44:tw=00:ow=34;42:" bfs_diff rainbow -color
}

function test_color_st_tw0_ow0() {
    LS_COLORS="st=37;44:tw=00:ow=00:" bfs_diff rainbow -color
}

function test_color_st0_tw_ow() {
    LS_COLORS="st=00:tw=40;32:ow=34;42:" bfs_diff rainbow -color
}

function test_color_st0_tw_ow0() {
    LS_COLORS="st=00:tw=40;32:ow=00:" bfs_diff rainbow -color
}

function test_color_st0_tw0_ow() {
    LS_COLORS="st=00:tw=00:ow=34;42:" bfs_diff rainbow -color
}

function test_color_st0_tw0_ow0() {
    LS_COLORS="st=00:tw=00:ow=00:" bfs_diff rainbow -color
}

function test_color_ext() {
    LS_COLORS="*.txt=01:" bfs_diff rainbow -color
}

function test_color_ext0() {
    LS_COLORS="*.txt=00:" bfs_diff rainbow -color
}

function test_color_ext_override() {
    LS_COLORS="*.tar.gz=01;31:*.TAR=01;32:*.gz=01;33:" bfs_diff rainbow -color
}

function test_color_ext_underride() {
    LS_COLORS="*.gz=01;33:*.TAR=01;32:*.tar.gz=01;31:" bfs_diff rainbow -color
}

function test_color_missing_colon() {
    LS_COLORS="*.txt=01" bfs_diff rainbow -color
}

function test_color_no_stat() {
    LS_COLORS="mh=0:ex=0:sg=0:su=0:st=0:ow=0:tw=0:*.txt=01:" bfs_diff rainbow -color
}

function test_color_L_no_stat() {
    LS_COLORS="mh=0:ex=0:sg=0:su=0:st=0:ow=0:tw=0:*.txt=01:" bfs_diff -L rainbow -color
}

function test_color_star() {
    # Regression test: don't segfault on LS_COLORS="*"
    LS_COLORS="*" bfs_diff rainbow -color
}

function test_color_ls() {
    rm -rf scratch/*
    touchp scratch/foo/bar/baz
    ln -s foo/bar/baz scratch/link
    ln -s foo/bar/nowhere scratch/broken
    ln -s foo/bar/nowhere/nothing scratch/nested
    ln -s foo/bar/baz/qux scratch/notdir
    ln -s scratch/foo/bar scratch/relative
    mkdir scratch/__bfs__
    ln -s /__bfs__/nowhere scratch/absolute

    local EXPECTED="$TESTS/${FUNCNAME[0]}.out"
    if [ "$UPDATE" ]; then
        local ACTUAL="$EXPECTED"
    else
        local ACTUAL="$TMP/${FUNCNAME[0]}.out"
    fi

    LS_COLORS="or=01;31:" invoke_bfs scratch/{,link,broken,nested,notdir,relative,absolute} -color -type l -ls \
        | sed 's/.* -> //' \
        | sort -o "$ACTUAL"

    if [ ! "$UPDATE" ]; then
        diff -u "$EXPECTED" "$ACTUAL"
    fi
}

function test_deep() {
    closefrom 4

    ulimit -n 16
    bfs_diff deep -type f -exec bash -c 'echo "${1:0:6}/.../${1##*/} (${#1})"' bash '{}' \;
}

function test_deep_strict() {
    closefrom 4

    # Not even enough fds to keep the root open
    ulimit -n 7
    bfs_diff deep -type f -exec bash -c 'echo "${1:0:6}/.../${1##*/} (${#1})"' bash '{}' \;
}

function test_exit() {
    invoke_bfs basic -name foo -exit 42
    if [ $? -ne 42 ]; then
        return 1
    fi

    invoke_bfs basic -name qux -exit 42
    if [ $? -ne 0 ]; then
        return 1
    fi

    bfs_diff basic/g -print -name g -exit
}

function test_printx() {
    bfs_diff weirdnames -printx
}

function test_and_purity() {
    # Regression test: (-a lhs(pure) rhs(always_false)) <==> rhs is only valid if rhs is pure
    bfs_diff basic -name nonexistent \( -print , -false \)
}

function test_or_purity() {
    # Regression test: (-o lhs(pure) rhs(always_true)) <==> rhs is only valid if rhs is pure
    bfs_diff basic -name '*' -o -print
}

function test_double_negation() {
    bfs_diff basic \! \! -name 'foo'
}

function test_not_reachability() {
    bfs_diff basic -print \! -quit -print
}

function test_comma_reachability() {
    bfs_diff basic -print -quit , -print
}

function test_de_morgan_not() {
    bfs_diff basic \! \( -name 'foo' -o \! -type f \)
}

function test_de_morgan_and() {
    bfs_diff basic \( \! -name 'foo' -a \! -type f \)
}

function test_de_morgan_or() {
    bfs_diff basic \( \! -name 'foo' -o \! -type f \)
}

function test_and_false_or_true() {
    # Test (-a lhs(always_true) -false) <==> (! lhs),
    # (-o lhs(always_false) -true) <==> (! lhs)
    bfs_diff basic -prune -false -o -true
}

function test_comma_redundant_true() {
    # Test (, lhs(always_true) -true) <==> lhs
    bfs_diff basic -prune , -true
}

function test_comma_redundant_false() {
    # Test (, lhs(always_false) -false) <==> lhs
    bfs_diff basic -print -not -prune , -false
}

function test_data_flow_depth() {
    bfs_diff basic -depth +1 -depth -4
}

function test_data_flow_group() {
    bfs_diff basic \( -group "$(id -g)" -nogroup \) -o \( -group "$(id -g)" -o -nogroup \)
}

function test_data_flow_user() {
    bfs_diff basic \( -user "$(id -u)" -nouser \) -o \( -user "$(id -u)" -o -nouser \)
}

function test_data_flow_hidden() {
    bfs_diff basic \( -hidden -not -hidden \) -o \( -hidden -o -not -hidden \)
}

function test_data_flow_sparse() {
    bfs_diff basic \( -sparse -not -sparse \) -o \( -sparse -o -not -sparse \)
}

function test_data_flow_type() {
    bfs_diff basic \! \( -type f -o \! -type f \)
}

function test_data_flow_and_swap() {
    bfs_diff basic \! -type f -a -type d
}

function test_data_flow_or_swap() {
    bfs_diff basic \! \( -type f -o \! -type d \)
}

function test_print_error() {
    if [ -e /dev/full ]; then
        fail quiet invoke_bfs basic -maxdepth 0 >/dev/full
    fi
}

function test_fprint_error() {
    if [ -e /dev/full ]; then
        fail quiet invoke_bfs basic -maxdepth 0 -fprint /dev/full
    fi
}

function test_fprint_noerror() {
    # Regression test: /dev/full should not fail until actually written to

    if [ -e /dev/full ]; then
        invoke_bfs basic -false -fprint /dev/full
    fi
}

function test_fprint_error_stdout() {
    if [ -e /dev/full ]; then
        fail quiet invoke_bfs basic -maxdepth 0 -fprint /dev/full >/dev/full
    fi
}

function test_fprint_error_stderr() {
    if [ -e /dev/full ]; then
        fail invoke_bfs basic -maxdepth 0 -fprint /dev/full 2>/dev/full
    fi
}

function test_print0() {
    invoke_bfs basic/a basic/b -print0 >scratch/test_print0.out

    if [ "$UPDATE" ]; then
        cp scratch/test_print0.out "$TESTS/test_print0.out"
    else
        cmp -s scratch/test_print0.out "$TESTS/test_print0.out"
    fi
}

function test_fprint0() {
    invoke_bfs basic/a basic/b -fprint0 scratch/test_fprint0.out

    if [ "$UPDATE" ]; then
        cp scratch/test_fprint0.out "$TESTS/test_fprint0.out"
    else
        cmp -s scratch/test_fprint0.out "$TESTS/test_fprint0.out"
    fi
}

function test_closed_stdin() {
    bfs_diff basic <&-
}

function test_ok_closed_stdin() {
    quiet bfs_diff basic -ok echo \; <&-
}

function test_okdir_closed_stdin() {
    quiet bfs_diff basic -okdir echo {} \; <&-
}

function test_closed_stdout() {
    fail quiet invoke_bfs basic >&-
}

function test_closed_stderr() {
    fail invoke_bfs basic >&- 2>&-
}

function test_unique() {
    bfs_diff links/{file,symlink,hardlink} -unique
}

function test_unique_depth() {
    bfs_diff basic -unique -depth
}

function test_L_unique() {
    bfs_diff -L links/{file,symlink,hardlink} -unique
}

function test_L_unique_loops() {
    bfs_diff -L loops/deeply/nested -unique
}

function test_L_unique_depth() {
    bfs_diff -L loops/deeply/nested -unique -depth
}

function test_mount() {
    rm -rf scratch/*
    mkdir scratch/{foo,mnt}
    sudo mount -t tmpfs tmpfs scratch/mnt
    $TOUCH scratch/foo/bar scratch/mnt/baz

    bfs_diff scratch -mount
    local ret=$?

    sudo umount scratch/mnt
    return $ret
}

function test_L_mount() {
    rm -rf scratch/*
    mkdir scratch/{foo,mnt}
    sudo mount -t tmpfs tmpfs scratch/mnt
    ln -s ../mnt scratch/foo/bar
    $TOUCH scratch/mnt/baz
    ln -s ../mnt/baz scratch/foo/qux

    bfs_diff -L scratch -mount
    local ret=$?

    sudo umount scratch/mnt
    return $ret
}

function test_xdev() {
    rm -rf scratch/*
    mkdir scratch/{foo,mnt}
    sudo mount -t tmpfs tmpfs scratch/mnt
    $TOUCH scratch/foo/bar scratch/mnt/baz

    bfs_diff scratch -xdev
    local ret=$?

    sudo umount scratch/mnt
    return $ret
}

function test_L_xdev() {
    rm -rf scratch/*
    mkdir scratch/{foo,mnt}
    sudo mount -t tmpfs tmpfs scratch/mnt
    ln -s ../mnt scratch/foo/bar
    $TOUCH scratch/mnt/baz
    ln -s ../mnt/baz scratch/foo/qux

    bfs_diff -L scratch -xdev
    local ret=$?

    sudo umount scratch/mnt
    return $ret
}

function test_inum_mount() {
    rm -rf scratch/*
    mkdir scratch/{foo,mnt}
    sudo mount -t tmpfs tmpfs scratch/mnt

    bfs_diff scratch -inum "$(inum scratch/mnt)"
    local ret=$?

    sudo umount scratch/mnt
    return $ret
}

function test_inum_bind_mount() {
    rm -rf scratch/*
    $TOUCH scratch/{foo,bar}
    sudo mount --bind scratch/{foo,bar}

    bfs_diff scratch -inum "$(inum scratch/bar)"
    local ret=$?

    sudo umount scratch/bar
    return $ret
}

function test_type_bind_mount() {
    rm -rf scratch/*
    $TOUCH scratch/{file,null}
    sudo mount --bind /dev/null scratch/null

    bfs_diff scratch -type c
    local ret=$?

    sudo umount scratch/null
    return $ret
}

function test_xtype_bind_mount() {
    rm -rf scratch/*
    $TOUCH scratch/{file,null}
    sudo mount --bind /dev/null scratch/null
    ln -s /dev/null scratch/link

    bfs_diff -L scratch -type c
    local ret=$?

    sudo umount scratch/null
    return $ret
}

function set_acl() {
    case "$UNAME" in
        Darwin)
            chmod +a "$(id -un) allow read,write" "$1"
            ;;
        FreeBSD)
            if [ "$(getconf ACL_NFS4 "$1")" -gt 0 ]; then
                setfacl -m "u:$(id -un):rw::allow" "$1"
            else
                setfacl -m "u:$(id -un):rw" "$1"
            fi
            ;;
        *)
            setfacl -m "u:$(id -un):rw" "$1"
            ;;
    esac
}

function test_acl() {
    rm -rf scratch/*

    quiet invoke_bfs scratch -quit -acl || return 0

    $TOUCH scratch/{normal,acl}
    set_acl scratch/acl || return 0
    ln -s acl scratch/link

    bfs_diff scratch -acl
}

function test_L_acl() {
    rm -rf scratch/*

    quiet invoke_bfs scratch -quit -acl || return 0

    $TOUCH scratch/{normal,acl}
    set_acl scratch/acl || return 0
    ln -s acl scratch/link

    bfs_diff -L scratch -acl
}

function test_capable() {
    rm -rf scratch/*

    if fail quiet invoke_bfs scratch -quit -capable; then
        return 0
    fi

    $TOUCH scratch/{normal,capable}
    sudo setcap all+ep scratch/capable
    ln -s capable scratch/link

    bfs_diff scratch -capable
}

function test_L_capable() {
    rm -rf scratch/*

    if fail quiet invoke_bfs scratch -quit -capable; then
        return 0
    fi

    $TOUCH scratch/{normal,capable}
    sudo setcap all+ep scratch/capable
    ln -s capable scratch/link

    bfs_diff -L scratch -capable
}

function make_xattrs() {
    rm -rf scratch/*

    $TOUCH scratch/{normal,xattr,xattr_2}
    ln -s xattr scratch/link
    ln -s normal scratch/xattr_link

    case "$UNAME" in
        Darwin)
            xattr -w bfs_test true scratch/xattr \
                && xattr -w bfs_test_2 true scratch/xattr_2 \
                && xattr -s -w bfs_test true scratch/xattr_link
            ;;
        FreeBSD)
            setextattr user bfs_test true scratch/xattr \
                && setextattr user bfs_test_2 true scratch/xattr_2 \
                && setextattr -h user bfs_test true scratch/xattr_link
            ;;
        *)
            # Linux tmpfs doesn't support the user.* namespace, so we use the security.*
            # namespace, which is writable by root and readable by others
            sudo setfattr -n security.bfs_test scratch/xattr \
                && sudo setfattr -n security.bfs_test_2 scratch/xattr_2 \
                && sudo setfattr -h -n security.bfs_test scratch/xattr_link
            ;;
    esac
}

function test_xattr() {
    quiet invoke_bfs scratch -quit -xattr || return 0
    make_xattrs || return 0
    bfs_diff scratch -xattr
}

function test_L_xattr() {
    quiet invoke_bfs scratch -quit -xattr || return 0
    make_xattrs || return 0
    bfs_diff -L scratch -xattr
}

function test_xattrname() {
    quiet invoke_bfs scratch -quit -xattr || return 0
    make_xattrs || return 0

    case "$UNAME" in
        Darwin|FreeBSD)
            bfs_diff scratch -xattrname bfs_test
            ;;
        *)
            bfs_diff scratch -xattrname security.bfs_test
            ;;
    esac
}

function test_L_xattrname() {
    quiet invoke_bfs scratch -quit -xattr || return 0
    make_xattrs || return 0

    case "$UNAME" in
        Darwin|FreeBSD)
            bfs_diff -L scratch -xattrname bfs_test
            ;;
        *)
            bfs_diff -L scratch -xattrname security.bfs_test
            ;;
    esac
}

function test_help() {
    invoke_bfs -help | grep -E '\{...?\}' && return 1
    invoke_bfs -D help | grep -E '\{...?\}' && return 1
    invoke_bfs -S help | grep -E '\{...?\}' && return 1
    invoke_bfs -regextype help | grep -E '\{...?\}' && return 1

    return 0
}

function test_version() {
    invoke_bfs -version >/dev/null
}

function test_typo() {
    invoke_bfs -dikkiq 2>&1 | grep follow >/dev/null
}

function test_D_multi() {
    quiet bfs_diff -D opt,tree,unknown basic
}

function test_D_all() {
    quiet bfs_diff -D all basic
}

function test_O0() {
    bfs_diff -O0 basic -not \( -type f -not -type f \)
}

function test_O1() {
    bfs_diff -O1 basic -not \( -type f -not -type f \)
}

function test_O2() {
    bfs_diff -O2 basic -not \( -type f -not -type f \)
}

function test_O3() {
    bfs_diff -O3 basic -not \( -type f -not -type f \)
}

function test_Ofast() {
    bfs_diff -Ofast basic -not \( -xtype f -not -xtype f \)
}

function test_S() {
    invoke_bfs -S "$1" -s basic >"$TMP/test_S_$1.out"

    if [ "$UPDATE" ]; then
        cp {"$TMP","$TESTS"}/"test_S_$1.out"
    else
        diff -u {"$TESTS","$TMP"}/"test_S_$1.out"
    fi
}

function test_S_bfs() {
    test_S bfs
}

function test_S_dfs() {
    test_S dfs
}

function test_S_ids() {
    test_S ids
}

function test_exclude_name() {
    bfs_diff basic -exclude -name foo
}

function test_exclude_depth() {
    bfs_diff basic -depth -exclude -name foo
}

function test_exclude_mindepth() {
    bfs_diff basic -mindepth 3 -exclude -name foo
}

function test_exclude_print() {
    fail quiet invoke_bfs basic -exclude -print
}

function test_exclude_exclude() {
    fail quiet invoke_bfs basic -exclude -exclude -name foo
}

function test_flags() {
    quiet invoke_bfs scratch -quit -flags offline || return 0

    rm -rf scratch/*

    $TOUCH scratch/{foo,bar}
    chflags offline scratch/bar || return 0

    bfs_diff scratch -flags -offline,nohidden
}

function test_files0_from_file() {
    cd weirdnames
    invoke_bfs -mindepth 1 -fprintf ../scratch/files0.in "%P\0"
    bfs_diff -files0-from ../scratch/files0.in
}

function test_files0_from_stdin() {
    cd weirdnames
    invoke_bfs -mindepth 1 -printf "%P\0" | bfs_diff -files0-from -
}

function test_files0_from_none() {
    printf "" | fail quiet invoke_bfs -files0-from -
}

function test_files0_from_empty() {
    printf "\0" | fail quiet invoke_bfs -files0-from -
}

function test_files0_from_nowhere() {
    fail quiet invoke_bfs -files0-from
}

function test_files0_from_nothing() {
    fail quiet invoke_bfs -files0-from basic/nonexistent
}

function test_files0_from_ok() {
    printf "basic\0" | fail quiet invoke_bfs -files0-from - -ok echo {} \;
}

function test_stderr_fails_silently() {
    if [ -e /dev/full ]; then
        bfs_diff -D all basic 2>/dev/full
    fi
}

function test_stderr_fails_loudly() {
    if [ -e /dev/full ]; then
        fail invoke_bfs -D all basic -false -fprint /dev/full 2>/dev/full
    fi
}

function test_unexpected_operator() {
    fail quiet invoke_bfs \! -o -print
}

BOL=
EOL='\n'

function update_eol() {
    # Put the cursor at the last column, then write a space so the next
    # character will wrap
    EOL="\\033[${COLUMNS}G "
}

if [ -t 1 -a ! "$VERBOSE" ]; then
    BOL='\r\033[K'

    # Workaround for bash 4: checkwinsize is off by default.  We can turn it on,
    # but we also have to explicitly trigger a foreground job to finish so that
    # it will update the window size before we use $COLUMNS
    shopt -s checkwinsize
    (:)

    update_eol
    trap update_eol WINCH
fi

passed=0
failed=0

for test in "${enabled_tests[@]}"; do
    printf "${BOL}${YLW}%s${RST}${EOL}" "$test"

    ("$test")
    status=$?

    if [ $status -eq 0 ]; then
        ((++passed))
    else
        ((++failed))
        printf "${BOL}${RED}%s failed!${RST}\n" "$test"
    fi
done

if [ $passed -gt 0 ]; then
    printf "${BOL}${GRN}tests passed: %d${RST}\n" "$passed"
fi
if [ $failed -gt 0 ]; then
    printf "${BOL}${RED}tests failed: %s${RST}\n" "$failed"
    exit 1
fi