summaryrefslogtreecommitdiffstats
path: root/library/tcltest/tcltest.tcl
blob: 950f3f487c5827ec3e9eb0765c82b184c717be81 (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
# tcltest.tcl --
#
#	This file contains support code for the Tcl test suite.  It 
#       defines the ::tcltest namespace and finds and defines the output
#       directory, constraints available, output and error channels, etc. used
#       by Tcl tests.  See the tcltest man page for more details.
#       
#       This design was based on the Tcl testing approach designed and
#       initially implemented by Mary Ann May-Pumphrey of Sun Microsystems. 
#
# Copyright (c) 1994-1997 Sun Microsystems, Inc.
# Copyright (c) 1998-1999 by Scriptics Corporation.
# All rights reserved.
# 
# RCS: @(#) $Id: tcltest.tcl,v 1.21 2000/01/27 23:44:07 jenn Exp $

package provide tcltest 1.0

# create the "tcltest" namespace for all testing variables and procedures

namespace eval tcltest { 

    # Export the public tcltest procs
    set procList [list test cleanupTests saveState restoreState \
	    normalizeMsg makeFile removeFile makeDirectory removeDirectory \
	    viewFile bytestring safeFetch threadReap getMatchingFiles \
	    loadTestedCommands normalizePath]
    foreach proc $procList {
	namespace export $proc
    }

    # ::tcltest::verbose defaults to "b"
    if {![info exists verbose]} {
	variable verbose "b"
    }

    # Match and skip patterns default to the empty list, except for
    # matchFiles, which defaults to all .test files in the testsDirectory

    if {![info exists match]} {
	variable match {}
    }
    if {![info exists skip]} {
	variable skip {}
    }
    if {![info exists matchFiles]} {
	variable matchFiles {*.test}
    }
    if {![info exists skipFiles]} {
	variable skipFiles {}
    }

    # By default, don't save core files
    if {![info exists preserveCore]} {
	variable preserveCore 0
    }

    # output goes to stdout by default
    if {![info exists outputChannel]} {
	variable outputChannel stdout
    }

    # errors go to stderr by default
    if {![info exists errorChannel]} {
	variable errorChannel stderr
    }

    # debug output doesn't get printed by default; debug level 1 spits
    # up only the tests that were skipped because they didn't match or were 
    # specifically skipped.  A debug level of 2 would spit up the tcltest
    # variables and flags provided; a debug level of 3 causes some additional
    # output regarding operations of the test harness.  The tcltest package
    # currently implements only up to debug level 3.
    if {![info exists debug]} {
	variable debug 0
    }

    # Save any arguments that we might want to pass through to other programs. 
    # This is used by the -args flag.
    if {![info exists parameters]} {
	variable parameters {}
    }

    # Count the number of files tested (0 if all.tcl wasn't called).
    # The all.tcl file will set testSingleFile to false, so stats will
    # not be printed until all.tcl calls the cleanupTests proc.
    # The currentFailure var stores the boolean value of whether the
    # current test file has had any failures.  The failFiles list
    # stores the names of test files that had failures.

    if {![info exists numTestFiles]} {
	variable numTestFiles 0
    }
    if {![info exists testSingleFile]} {
	variable testSingleFile true
    }
    if {![info exists currentFailure]} {
	variable currentFailure false
    }
    if {![info exists failFiles]} {
	variable failFiles {}
    }

    # Tests should remove all files they create.  The test suite will
    # check the current working dir for files created by the tests.
    # ::tcltest::filesMade keeps track of such files created using the
    # ::tcltest::makeFile and ::tcltest::makeDirectory procedures.
    # ::tcltest::filesExisted stores the names of pre-existing files.

    if {![info exists filesMade]} {
	variable filesMade {}
    }
    if {![info exists filesExisted]} {
	variable filesExisted {}
    }

    # ::tcltest::numTests will store test files as indices and the list
    # of files (that should not have been) left behind by the test files.

    if {![info exists createdNewFiles]} {
	variable createdNewFiles
	array set ::tcltest::createdNewFiles {}
    }

    # initialize ::tcltest::numTests array to keep track fo the number of
    # tests that pass, fail, and are skipped.

    if {![info exists numTests]} {
	variable numTests
	array set ::tcltest::numTests \
		[list Total 0 Passed 0 Skipped 0 Failed	0] 
    }

    # initialize ::tcltest::skippedBecause array to keep track of
    # constraints that kept tests from running; a constraint name of
    # "userSpecifiedSkip" means that the test appeared on the list of tests
    # that matched the -skip value given to the flag; "userSpecifiedNonMatch"
    # means that the test didn't match the argument given to the -match flag;
    # both of these constraints are counted only if ::tcltest::debug is set to
    # true. 

    if {![info exists skippedBecause]} {
	variable skippedBecause
	array set ::tcltest::skippedBecause {}
    }

    # initialize the ::tcltest::testConstraints array to keep track of valid
    # predefined constraints (see the explanation for the
    # ::tcltest::initConstraints proc for more details).

    if {![info exists testConstraints]} {
	variable testConstraints
	array set ::tcltest::testConstraints {}
    }

    # Don't run only the constrained tests by default

    if {![info exists limitConstraints]} {
	variable limitConstraints false
    }

    # A test application has to know how to load the tested commands into
    # the interpreter.

    if {![info exists loadScript]} {
	variable loadScript {}
    }

    # tests that use threads need to know which is the main thread

    if {![info exists mainThread]} {
	variable mainThread 1
	if {[info commands testthread] != {}} {
	    set mainThread [testthread names]
	}
    }

    # save the original environment so that it can be restored later
    
    if {![info exists originalEnv]} {
	variable originalEnv
	array set ::tcltest::originalEnv [array get ::env]
    }

    # Set ::tcltest::workingDirectory to [pwd]. The default output directory
    # for Tcl tests is the working directory.

    if {![info exists workingDirectory]} {
	variable workingDirectory [pwd]
    }
    if {![info exists temporaryDirectory]} {
	variable temporaryDirectory $workingDirectory
    }

    # Tests should not rely on the current working directory.
    # Files that are part of the test suite should be accessed relative to 
    # ::tcltest::testsDirectory.

    if {![info exists testsDirectory]} {
	set oldpwd [pwd]
	catch {cd [file join [file dirname [info script]] .. .. tests]}
	variable testsDirectory [pwd]
	cd $oldpwd
	unset oldpwd
    }

    # the variables and procs that existed when ::tcltest::saveState was
    # called are stored in a variable of the same name
    if {![info exists saveState]} {
	variable saveState {}
    }

    # Internationalization support
    if {![info exists isoLocale]} {
	variable isoLocale fr
        switch $tcl_platform(platform) {
	    "unix" {

		# Try some 'known' values for some platforms:

		switch -exact -- $tcl_platform(os) {
		    "FreeBSD" {
			set ::tcltest::isoLocale fr_FR.ISO_8859-1
		    }
		    HP-UX {
			set ::tcltest::isoLocale fr_FR.iso88591
		    }
		    Linux -
		    IRIX {
			set ::tcltest::isoLocale fr
		    }
		    default {

			# Works on SunOS 4 and Solaris, and maybe others...
			# define it to something else on your system
			#if you want to test those.

			set ::tcltest::isoLocale iso_8859_1
		    }
		}
	    }
	    "windows" {
		set ::tcltest::isoLocale French
	    }
	}
    }

    # Set the location of the execuatble
    if {![info exists tcltest]} {
	variable tcltest [info nameofexecutable]
    }

    # save the platform information so it can be restored later
    if {![info exists originalTclPlatform]} {
	variable originalTclPlatform [array get tcl_platform]
    }

    # If a core file exists, save its modification time.
    if {![info exists coreModificationTime]} {
	if {[file exists [file join $::tcltest::workingDirectory core]]} {
	    variable coreModificationTime [file mtime [file join \
		    $::tcltest::workingDirectory core]]
	}
    }

    # Tcl version numbers
    if {![info exists version]} {
	variable version 8.3
    }
    if {![info exists patchLevel]} {
	variable patchLevel 8.3.0
    }
}   

# ::tcltest::Debug* --
#
#     Internal helper procedures to write out debug information
#     dependent on the chosen level. A test shell may overide
#     them, f.e. to redirect the output into a different
#     channel, or even into a GUI.

# ::tcltest::DebugPuts --
#
#     Prints the specified string if the current debug level is
#     higher than the provided level argument.
#
# Arguments:
#     level   The lowest debug level triggering the output
#     string  The string to print out.
#
# Results:
#     Prints the string. Nothing else is allowed.
#

proc ::tcltest::DebugPuts {level string} {
    variable debug
    if {$debug >= $level} {
	puts $string
    }
}

# ::tcltest::DebugPArray --
#
#     Prints the contents of the specified array if the current
#       debug level is higher than the provided level argument
#
# Arguments:
#     level           The lowest debug level triggering the output
#     arrayvar        The name of the array to print out.
#
# Results:
#     Prints the contents of the array. Nothing else is allowed.
#

proc ::tcltest::DebugPArray {level arrayvar} {
    variable debug

    if {$debug >= $level} {
	catch {upvar  $arrayvar $arrayvar}
	parray $arrayvar
    }
}

# ::tcltest::DebugDo --
#
#     Executes the script if the current debug level is greater than
#       the provided level argument
#
# Arguments:
#     level   The lowest debug level triggering the execution.
#     script  The tcl script executed upon a debug level high enough.
#
# Results:
#     Arbitrary side effects, dependent on the executed script.
#

proc ::tcltest::DebugDo {level script} {
    variable debug

    if {$debug >= $level} {
	uplevel $script
    }
}

# ::tcltest::AddToSkippedBecause --
#
#	Increments the variable used to track how many tests were skipped
#       because of a particular constraint.
#
# Arguments:
#	constraint     The name of the constraint to be modified
#
# Results:
#	Modifies ::tcltest::skippedBecause; sets the variable to 1 if didn't
#       previously exist - otherwise, it just increments it.

proc ::tcltest::AddToSkippedBecause { constraint } {
    # add the constraint to the list of constraints that kept tests
    # from running

    if {[info exists ::tcltest::skippedBecause($constraint)]} {
	incr ::tcltest::skippedBecause($constraint)
    } else {
	set ::tcltest::skippedBecause($constraint) 1
    }
    return
}

# ::tcltest::PrintError --
#
#	Prints errors to ::tcltest::errorChannel and then flushes that
#       channel, making sure that all messages are < 80 characters per line.
#
# Arguments:
#	errorMsg     String containing the error to be printed
#

proc ::tcltest::PrintError {errorMsg} {
    set InitialMessage "Error:  "
    set InitialMsgLen  [string length $InitialMessage]
    puts -nonewline $::tcltest::errorChannel $InitialMessage

    # Keep track of where the end of the string is.
    set endingIndex [string length $errorMsg]

    if {$endingIndex < 80} {
	puts $::tcltest::errorChannel $errorMsg
    } else {
	# Print up to 80 characters on the first line, including the
	# InitialMessage. 
	set beginningIndex [string last " " [string range $errorMsg 0 \
		[expr {80 - $InitialMsgLen}]]]
	puts $::tcltest::errorChannel [string range $errorMsg 0 $beginningIndex]

	while {$beginningIndex != "end"} {
	    puts -nonewline $::tcltest::errorChannel \
		    [string repeat " " $InitialMsgLen]  
	    if {[expr {$endingIndex - $beginningIndex}] < 72} {
		puts $::tcltest::errorChannel [string trim \
			[string range $errorMsg $beginningIndex end]]
		set beginningIndex end
	    } else {
		set newEndingIndex [expr [string last " " [string range \
			$errorMsg $beginningIndex \
			[expr {$beginningIndex + 72}]]] + $beginningIndex]
		if {($newEndingIndex <= 0) \
			|| ($newEndingIndex <= $beginningIndex)} {
		    set newEndingIndex end
		}
		puts $::tcltest::errorChannel [string trim \
			[string range $errorMsg \
			$beginningIndex $newEndingIndex]]
		set beginningIndex $newEndingIndex
	    }
	}
    }
    flush $::tcltest::errorChannel
    return
}

if {[namespace inscope ::tcltest info procs initConstraintsHook] == {}} {
    proc ::tcltest::initConstraintsHook {} {}
}

# ::tcltest::initConstraints --
#
# Check Constraintsuration information that will determine which tests
# to run.  To do this, create an array ::tcltest::testConstraints.  Each
# element has a 0 or 1 value.  If the element is "true" then tests
# with that constraint will be run, otherwise tests with that constraint
# will be skipped.  See the tcltest man page for the list of built-in
# constraints defined in this procedure.
#
# Arguments:
#	none
#
# Results:
#	The ::tcltest::testConstraints array is reset to have an index for
#	each built-in test constraint.

proc ::tcltest::initConstraints {} {
    global tcl_platform tcl_interactive tk_version

    # The following trace procedure makes it so that we can safely refer to
    # non-existent members of the ::tcltest::testConstraints array without
    # causing an error.  Instead, reading a non-existent member will return 0.
    # This is necessary because tests are allowed to use constraint "X" without
    # ensuring that ::tcltest::testConstraints("X") is defined.

    trace variable ::tcltest::testConstraints r ::tcltest::safeFetch

    proc ::tcltest::safeFetch {n1 n2 op} {
	if {($n2 != {}) && ([info exists ::tcltest::testConstraints($n2)] == 0)} {
	    set ::tcltest::testConstraints($n2) 0
	}
    }

    ::tcltest::initConstraintsHook

    set ::tcltest::testConstraints(unixOnly) \
	    [string equal $tcl_platform(platform) "unix"]
    set ::tcltest::testConstraints(macOnly) \
	    [string equal $tcl_platform(platform) "macintosh"]
    set ::tcltest::testConstraints(pcOnly) \
	    [string equal $tcl_platform(platform) "windows"]

    set ::tcltest::testConstraints(unix) $::tcltest::testConstraints(unixOnly)
    set ::tcltest::testConstraints(mac) $::tcltest::testConstraints(macOnly)
    set ::tcltest::testConstraints(pc) $::tcltest::testConstraints(pcOnly)

    set ::tcltest::testConstraints(unixOrPc) \
	    [expr {$::tcltest::testConstraints(unix) \
	    || $::tcltest::testConstraints(pc)}]
    set ::tcltest::testConstraints(macOrPc) \
	    [expr {$::tcltest::testConstraints(mac) \
	    || $::tcltest::testConstraints(pc)}]
    set ::tcltest::testConstraints(macOrUnix) \
	    [expr {$::tcltest::testConstraints(mac) \
	    || $::tcltest::testConstraints(unix)}]

    set ::tcltest::testConstraints(nt) [string equal $tcl_platform(os) \
	    "Windows NT"]
    set ::tcltest::testConstraints(95) [string equal $tcl_platform(os) \
	    "Windows 95"]
    set ::tcltest::testConstraints(98) [string equal $tcl_platform(os) \
	    "Windows 98"]
    set ::tcltest::testConstraints(win32s) [string equal $tcl_platform(os) \
	    "Win32s"]

    # The following Constraints switches are used to mark tests that should
    # work, but have been temporarily disabled on certain platforms because
    # they don't and we haven't gotten around to fixing the underlying
    # problem. 

    set ::tcltest::testConstraints(tempNotPc) \
	    [expr {!$::tcltest::testConstraints(pc)}]
    set ::tcltest::testConstraints(tempNotMac) \
	    [expr {!$::tcltest::testConstraints(mac)}]
    set ::tcltest::testConstraints(tempNotUnix) \
	    [expr {!$::tcltest::testConstraints(unix)}]

    # The following Constraints switches are used to mark tests that crash on
    # certain platforms, so that they can be reactivated again when the
    # underlying problem is fixed.

    set ::tcltest::testConstraints(pcCrash) \
	    [expr {!$::tcltest::testConstraints(pc)}]
    set ::tcltest::testConstraints(win32sCrash) \
	    [expr {!$::tcltest::testConstraints(win32s)}]
    set ::tcltest::testConstraints(macCrash) \
	    [expr {!$::tcltest::testConstraints(mac)}]
    set ::tcltest::testConstraints(unixCrash) \
	    [expr {!$::tcltest::testConstraints(unix)}]

    # Skip empty tests

    set ::tcltest::testConstraints(emptyTest) 0

    # By default, tests that expose known bugs are skipped.

    set ::tcltest::testConstraints(knownBug) 0

    # By default, non-portable tests are skipped.

    set ::tcltest::testConstraints(nonPortable) 0

    # Some tests require user interaction.

    set ::tcltest::testConstraints(userInteraction) 0

    # Some tests must be skipped if the interpreter is not in interactive mode
    
    if {[info exists tcl_interactive]} {
	set ::tcltest::testConstraints(interactive) $::tcl_interactive
    } else {
	set ::tcltest::testConstraints(interactive) 0
    }

    # Some tests can only be run if the installation came from a CD image
    # instead of a web image
    # Some tests must be skipped if you are running as root on Unix.
    # Other tests can only be run if you are running as root on Unix.

    set ::tcltest::testConstraints(root) 0
    set ::tcltest::testConstraints(notRoot) 1
    set user {}
    if {[string equal $tcl_platform(platform) "unix"]} {
	catch {set user [exec whoami]}
	if {[string equal $user ""]} {
	    catch {regexp {^[^(]*\(([^)]*)\)} [exec id] dummy user}
	}
	if {([string equal $user "root"]) || ([string equal $user ""])} {
	    set ::tcltest::testConstraints(root) 1
	    set ::tcltest::testConstraints(notRoot) 0
	}
    }

    # Set nonBlockFiles constraint: 1 means this platform supports
    # setting files into nonblocking mode.

    if {[catch {set f [open defs r]}]} {
	set ::tcltest::testConstraints(nonBlockFiles) 1
    } else {
	if {[catch {fconfigure $f -blocking off}] == 0} {
	    set ::tcltest::testConstraints(nonBlockFiles) 1
	} else {
	    set ::tcltest::testConstraints(nonBlockFiles) 0
	}
	close $f
    }

    # Set asyncPipeClose constraint: 1 means this platform supports
    # async flush and async close on a pipe.
    #
    # Test for SCO Unix - cannot run async flushing tests because a
    # potential problem with select is apparently interfering.
    # (Mark Diekhans).

    if {[string equal $tcl_platform(platform) "unix"]} {
	if {[catch {exec uname -X | fgrep {Release = 3.2v}}] == 0} {
	    set ::tcltest::testConstraints(asyncPipeClose) 0
	} else {
	    set ::tcltest::testConstraints(asyncPipeClose) 1
	}
    } else {
	set ::tcltest::testConstraints(asyncPipeClose) 1
    }

    # Test to see if we have a broken version of sprintf with respect
    # to the "e" format of floating-point numbers.

    set ::tcltest::testConstraints(eformat) 1
    if {![string equal "[format %g 5e-5]" "5e-05"]} {
	set ::tcltest::testConstraints(eformat) 0
    }

    # Test to see if execed commands such as cat, echo, rm and so forth are
    # present on this machine.

    set ::tcltest::testConstraints(unixExecs) 1
    if {[string equal $tcl_platform(platform) "macintosh"]} {
	set ::tcltest::testConstraints(unixExecs) 0
    }
    if {($::tcltest::testConstraints(unixExecs) == 1) && \
	    ([string equal $tcl_platform(platform) "windows"])} {
	if {[catch {exec cat defs}] == 1} {
	    set ::tcltest::testConstraints(unixExecs) 0
	}
	if {($::tcltest::testConstraints(unixExecs) == 1) && \
		([catch {exec echo hello}] == 1)} {
	    set ::tcltest::testConstraints(unixExecs) 0
	}
	if {($::tcltest::testConstraints(unixExecs) == 1) && \
		([catch {exec sh -c echo hello}] == 1)} {
	    set ::tcltest::testConstraints(unixExecs) 0
	}
	if {($::tcltest::testConstraints(unixExecs) == 1) && \
		([catch {exec wc defs}] == 1)} {
	    set ::tcltest::testConstraints(unixExecs) 0
	}
	if {$::tcltest::testConstraints(unixExecs) == 1} {
	    exec echo hello > removeMe
	    if {[catch {exec rm removeMe}] == 1} {
		set ::tcltest::testConstraints(unixExecs) 0
	    }
	}
	if {($::tcltest::testConstraints(unixExecs) == 1) && \
		([catch {exec sleep 1}] == 1)} {
	    set ::tcltest::testConstraints(unixExecs) 0
	}
	if {($::tcltest::testConstraints(unixExecs) == 1) && \
		([catch {exec fgrep unixExecs defs}] == 1)} {
	    set ::tcltest::testConstraints(unixExecs) 0
	}
	if {($::tcltest::testConstraints(unixExecs) == 1) && \
		([catch {exec ps}] == 1)} {
	    set ::tcltest::testConstraints(unixExecs) 0
	}
	if {($::tcltest::testConstraints(unixExecs) == 1) && \
		([catch {exec echo abc > removeMe}] == 0) && \
		([catch {exec chmod 644 removeMe}] == 1) && \
		([catch {exec rm removeMe}] == 0)} {
	    set ::tcltest::testConstraints(unixExecs) 0
	} else {
	    catch {exec rm -f removeMe}
	}
	if {($::tcltest::testConstraints(unixExecs) == 1) && \
		([catch {exec mkdir removeMe}] == 1)} {
	    set ::tcltest::testConstraints(unixExecs) 0
	} else {
	    catch {exec rm -r removeMe}
	}
    }

    # Locate tcltest executable

    if {![info exists tk_version]} {
	set tcltest [info nameofexecutable]

	if {$tcltest == "{}"} {
	    set tcltest {}
	}
    }

    set ::tcltest::testConstraints(stdio) 0
    catch {
	catch {file delete -force tmp}
	set f [open tmp w]
	puts $f {
	    exit
	}
	close $f

	set f [open "|[list $tcltest tmp]" r]
	close $f
	
	set ::tcltest::testConstraints(stdio) 1
    }
    catch {file delete -force tmp}

    # Deliberately call socket with the wrong number of arguments.  The error
    # message you get will indicate whether sockets are available on this
    # system. 

    catch {socket} msg
    set ::tcltest::testConstraints(socket) \
	    [expr {$msg != "sockets are not available on this system"}]
    
    # Check for internationalization

    if {[info commands testlocale] == ""} {
	# No testlocale command, no tests...
	set ::tcltest::testConstraints(hasIsoLocale) 0
    } else {
	set ::tcltest::testConstraints(hasIsoLocale) \
		[string length [::tcltest::set_iso8859_1_locale]]
	::tcltest::restore_locale
    }
}   

# ::tcltest::PrintUsageInfoHook
#
#       Hook used for customization of display of usage information.
#

if {[namespace inscope ::tcltest info procs PrintUsageInfoHook] == {}} {
    proc ::tcltest::PrintUsageInfoHook {} {}
}

# ::tcltest::PrintUsageInfo
#
#	Prints out the usage information for package tcltest.  This can be
#       customized with the redefinition of ::tcltest::PrintUsageInfoHook.
#
# Arguments:
#	none
#

proc ::tcltest::PrintUsageInfo {} {
    puts [format "Usage: [file tail [info nameofexecutable]] \
	    script ?-help? ?flag value? ... \n\
	    Available flags (and valid input values) are: \n\
	    -help          \t Display this usage information. \n\
	    -verbose level \t Takes any combination of the values \n\
	    \t                 'p', 's' and 'b'.  Test suite will \n\
	    \t                 display all passed tests if 'p' is \n\
	    \t                 specified, all skipped tests if 's' \n\
	    \t                 is specified, and the bodies of \n\
	    \t                 failed tests if 'b' is specified. \n\
	    \t                 The default value is 'b'. \n\
	    -constraints list\t Do not skip the listed constraints\n\
	    -limitconstraints bool\t Only run tests with the constraints\n\
	    \t                 listed in -constraints.\n\
	    -match pattern \t Run all tests within the specified \n\
	    \t                 files that match the glob pattern \n\
	    \t                 given. \n\
	    -skip pattern  \t Skip all tests within the set of \n\
	    \t                 specified tests (via -match) and \n\
	    \t                 files that match the glob pattern \n\
	    \t                 given. \n\
	    -file pattern  \t Run tests in all test files that \n\
	    \t                 match the glob pattern given. \n\
	    -notfile pattern\t Skip all test files that match the \n\
	    \t                 glob pattern given. \n\
	    -preservecore level \t If 2, save any core files produced \n\
	    \t                 during testing in the directory \n\
	    \t                 specified by -tmpdir. If 1, notify the\n\
	    \t                 user if core files are created. The default \n\
	    \t                 is $::tcltest::preserveCore. \n\
	    -tmpdir directory\t Save temporary files in the specified\n\
	    \t                 directory.  The default value is \n\
	    \t                 $::tcltest::temporaryDirectory. \n\
	    -testdir directories\t Search tests in the specified\n\
	    \t                 directories.  The default value is \n\
	    \t                 $::tcltest::testsDirectory. \n\
	    -outfile file    \t Send output from test runs to the \n\
	    \t                 specified file.  The default is \n\
	    \t                 stdout. \n\
	    -errfile file    \t Send errors from test runs to the \n\
	    \t                 specified file.  The default is \n\
	    \t                 stderr. \n\
	    -loadfile file   \t Read the script to load the tested \n\
	    \t                 commands from the specified file. \n\
	    -load script     \t Specifies the script to load the tested \n\
	    \t                 commands. \n\
	    -debug level     \t Internal debug flag."]
    ::tcltest::PrintUsageInfoHook
    return
}

# ::tcltest::CheckDirectory --
#
#     This procedure checks whether the specified path is a readable
#     and/or writable directory. If one of the conditions is not
#     satisfied an error is printed and the application aborted. The
#     procedure assumes that the caller already checked the existence
#     of the path.
#
# Arguments
#     rw      Information what attributes to check. Allowed values:
#             r, w, rw, wr. If 'r' is part of the value the directory
#             must be readable. 'w' associates to 'writable'.
#     dir     The directory to check.
#     errMsg  The string to prepend to the actual error message before
#             printing it.
#
# Results
#     none
#

proc ::tcltest::CheckDirectory {rw dir errMsg} {
    # Allowed values for 'rw': r, w, rw, wr

    if {![file isdir $dir]} { 
	::tcltest::PrintError "$errMsg \"$dir\" is not a directory"
	exit 1
    } elseif {([string first w $rw] >= 0) && ![file writable $dir]} {
	::tcltest::PrintError "$errMsg \"$dir\" is not writeable"
	exit 1
    } elseif {([string first r $rw] >= 0) && ![file readable $dir]} {
	::tcltest::PrintError "$errMsg \"$dir\" is not readable"
	exit 1
    }
}

# ::tcltest::normalizePath --
#
#     This procedure resolves any symlinks in the path thus creating a
#     path without internal redirection. It assumes that the incoming
#     path is absolute.
#
# Arguments
#     pathVar contains the name of the variable containing the path to modify.
#
# Results
#     The path is modified in place.
#

proc ::tcltest::normalizePath {pathVar} {
    upvar $pathVar path

    set oldpwd [pwd]
    catch {cd $path}
    set path [pwd]
    cd $oldpwd
}

# ::tcltest::MakeAbsolutePath --
#
#     This procedure checks whether the incoming path is absolute or not.
#     Makes it absolute if it was not.
#
# Arguments
#     pathVar contains the name of the variable containing the path to modify.
#     prefix  is optional, contains the path to use to make the other an
#             absolute one. The current working directory is used if it was
#             not specified.
#
# Results
#     The path is modified in place.
#

proc ::tcltest::MakeAbsolutePath {pathVar {prefix {}}} {
    upvar $pathVar path

    if {![string equal [file pathtype $path] "absolute"]} { 
	if {$prefix == {}} {
	    set prefix [pwd]
	}

	set path [file join $prefix $path] 
    }
}

# ::tcltest::processCmdLineArgsFlagsHook --
#
#	This hook is used to add to the list of command line arguments that are
#       processed by ::tcltest::processCmdLineArgs. 
#

if {[namespace inscope ::tcltest info procs processCmdLineArgsAddFlagsHook] == {}} {
    proc ::tcltest::processCmdLineArgsAddFlagsHook {} {}
}

# ::tcltest::processCmdLineArgsHook --
#
#	This hook is used to actually process the flags added by
#       ::tcltest::processCmdLineArgsAddFlagsHook.
#
# Arguments:
#	flags      The flags that have been pulled out of argv
#

if {[namespace inscope ::tcltest info procs processCmdLineArgsHook] == {}} {
    proc ::tcltest::processCmdLineArgsHook {flag} {}
}

# ::tcltest::processCmdLineArgs --
#
#	Use command line args to set the verbose, skip, and
#	match, outputChannel, errorChannel, debug, and temporaryDirectory
#       variables.   
#
#       This procedure must be run after constraints are initialized, because
#       some constraints can be overridden.
#
# Arguments:
#	none
#
# Results:
#	Sets the above-named variables in the tcltest namespace.

proc ::tcltest::processCmdLineArgs {} {
    global argv

    # The "argv" var doesn't exist in some cases, so use {}.

    if {(![info exists argv]) || ([llength $argv] < 1)} {
	set flagArray {}
    } else {
	set flagArray $argv
    }
    
    # Allow for 1-char abbreviations, where applicable (e.g., -match == -m).
    # Note that -verbose cannot be abbreviated to -v in wish because it
    # conflicts with the wish option -visual.

    # Process -help first
    if {([lsearch -exact $flagArray {-help}] != -1) || \
	    ([lsearch -exact $flagArray {-h}] != -1)} {
	::tcltest::PrintUsageInfo
	exit 1
    }

    if {[catch {array set flag $flagArray}]} {
	::tcltest::PrintError "odd number of arguments specified on command line: \ 
	$argv"
	::tcltest::PrintUsageInfo
	exit 1
    }

    # -help is not listed since it has already been processed
    lappend defaultFlags -verbose -match -skip -constraints \
	    -outfile -errfile -debug -tmpdir -file -notfile \
	    -preservecore -limitconstraints -args -testdir \
	    -load -loadfile
    set defaultFlags [concat $defaultFlags \
	    [ ::tcltest::processCmdLineArgsAddFlagsHook ]]

    foreach arg $defaultFlags {
	set abbrev [string range $arg 0 1]
	if {([info exists flag($abbrev)]) && \
		([lsearch -exact $flagArray $arg] < [lsearch -exact \
		$flagArray $abbrev])} { 
	    set flag($arg) $flag($abbrev)
	}
    }

    # Set ::tcltest::parameters to the arg of the -args flag, if given
    if {[info exists flag(-args)]} {
	set ::tcltest::parameters $flag(-args)
    }

    # Set ::tcltest::verbose to the arg of the -verbose flag, if given

    if {[info exists flag(-verbose)]} {
	set ::tcltest::verbose $flag(-verbose)
    }

    # Set ::tcltest::match to the arg of the -match flag, if given.  

    if {[info exists flag(-match)]} {
	set ::tcltest::match $flag(-match)
    } 

    # Set ::tcltest::skip to the arg of the -skip flag, if given

    if {[info exists flag(-skip)]} {
	set ::tcltest::skip $flag(-skip)
    }

    # Handle the -file and -notfile flags
    if {[info exists flag(-file)]} {
	set ::tcltest::matchFiles $flag(-file)
    }
    if {[info exists flag(-notfile)]} {
	set ::tcltest::skipFiles $flag(-notfile)
    }

    # Use the -constraints flag, if given, to turn on constraints that are
    # turned off by default: userInteractive knownBug nonPortable.  This
    # code fragment must be run after constraints are initialized.

    if {[info exists flag(-constraints)]} {
	foreach elt $flag(-constraints) {
	    set ::tcltest::testConstraints($elt) 1
	}
    }

    # Use the -limitconstraints flag, if given, to tell the harness to limit
    # tests run to those that were specified using the -constraints flag.  If
    # the -constraints flag was not specified, print out an error and exit.
    if {[info exists flag(-limitconstraints)]} {
	if {![info exists flag(-constraints)]} {
	    puts "You can only use the -limitconstraints flag with \
		    -constraints"
	    exit 1
	}
	set ::tcltest::limitConstraints $flag(-limitconstraints)
	foreach elt [array names ::tcltest::testConstraints] {
	    if {[lsearch -exact $flag(-constraints) $elt] == -1} {
		set ::tcltest::testConstraints($elt) 0
	    }
	}
    }

    # Set the ::tcltest::temporaryDirectory to the arg of -tmpdir, if
    # given.
    # 
    # If the path is relative, make it absolute.  If the file exists but
    # is not a dir, then return an error.
    #
    # If ::tcltest::temporaryDirectory does not already exist, create it.
    # If you cannot create it, then return an error.

    set tmpDirError ""
    if {[info exists flag(-tmpdir)]} {
	set ::tcltest::temporaryDirectory $flag(-tmpdir)
	
	MakeAbsolutePath ::tcltest::temporaryDirectory
	set tmpDirError "bad argument \"$flag(-tmpdir)\" to -tmpdir: "
    }
    if {[file exists $::tcltest::temporaryDirectory]} {
	::tcltest::CheckDirectory rw $::tcltest::temporaryDirectory $tmpDirError
    } else {
	file mkdir $::tcltest::temporaryDirectory
    }

    normalizePath ::tcltest::temporaryDirectory

    # Set the ::tcltest::testsDirectory to the arg of -testdir, if
    # given.
    # 
    # If the path is relative, make it absolute.  If the file exists but
    # is not a dir, then return an error.
    #
    # If ::tcltest::temporaryDirectory does not already exist return an error.
    
    set testDirError ""
    if {[info exists flag(-testdir)]} {
	set ::tcltest::testsDirectory $flag(-testdir)
	
	MakeAbsolutePath ::tcltest::testsDirectory
	set testDirError "bad argument \"$flag(-testdir)\" to -testdir: "
    }
    if {[file exists $::tcltest::testsDirectory]} {
	::tcltest::CheckDirectory r $::tcltest::testsDirectory $testDirError
    } else {
	::tcltest::PrintError "$testDirError \"$::tcltest::testsDirectory\" \
		does not exist"
	exit 1
    }
    
    normalizePath ::tcltest::testsDirectory
    
    # Save the names of files that already exist in
    # the output directory.
    foreach file [glob -nocomplain \
	    [file join $::tcltest::temporaryDirectory *]] {
	lappend ::tcltest::filesExisted [file tail $file]
    }

    # If an alternate error or output files are specified, change the
    # default channels.

    if {[info exists flag(-outfile)]} {
	set tmp $flag(-outfile)
	MakeAbsolutePath tmp $::tcltest::temporaryDirectory
	set ::tcltest::outputChannel [open $tmp w]
    } 

    if {[info exists flag(-errfile)]} {
	set tmp $flag(-errfile)
	MakeAbsolutePath tmp $::tcltest::temporaryDirectory
	set ::tcltest::errorChannel [open $tmp w]
    }

    # If a load script was specified, either directly or through
    # a file, remember it for later usage.
    
    if {[info exists flag(-load)] &&  \
	    ([lsearch -exact $flagArray -load] > \
	    [lsearch -exact $flagArray -loadfile])} {
	    set ::tcltest::loadScript $flag(-load)
    }
    
    if {[info exists flag(-loadfile)] && \
	    ([lsearch -exact $flagArray -loadfile] > \
	    [lsearch -exact $flagArray -load]) } {
	set tmp $flag(-loadfile)
	MakeAbsolutePath tmp $::tcltest::temporaryDirectory
	set tmp [open $tmp r]
	set ::tcltest::loadScript [read $tmp]
	close $tmp
    }

    # If the user specifies debug testing, print out extra information during
    # the run.
    if {[info exists flag(-debug)]} {
	set ::tcltest::debug $flag(-debug)
    }

    # Handle -preservecore
    if {[info exists flag(-preservecore)]} {
	set ::tcltest::preserveCore $flag(-preservecore)
    }

    # Call the hook
    ::tcltest::processCmdLineArgsHook [array get flag]

    # Spit out everything you know if we're at a debug level 2 or greater

    DebugPuts    2 "Flags passed into tcltest:"
    DebugPArray  2 flag
    DebugPuts    2 "::tcltest::debug              = $::tcltest::debug"
    DebugPuts    2 "::tcltest::testsDirectory     = $::tcltest::testsDirectory"
    DebugPuts    2 "::tcltest::workingDirectory   = $::tcltest::workingDirectory"
    DebugPuts    2 "::tcltest::temporaryDirectory = $::tcltest::temporaryDirectory"
    DebugPuts    2 "::tcltest::outputChannel      = $::tcltest::outputChannel"
    DebugPuts    2 "::tcltest::errorChannel       = $::tcltest::errorChannel"
    DebugPuts    2 "Original environment (::tcltest::originalEnv):"
    DebugPArray  2 ::tcltest::originalEnv
    DebugPuts    2 "Constraints:"
    DebugPArray  2 ::tcltest::testConstraints
}

# ::tcltest::loadTestedCommands --
#
#     Uses the specified script to load the commands to test. Allowed to
#     be empty, as the tested commands could have been compiled into the
#     interpreter.
#
# Arguments
#     none
#
# Results
#     none

proc ::tcltest::loadTestedCommands {} {
    if {$::tcltest::loadScript == {}} {
	return
    }
    
    uplevel #0 $::tcltest::loadScript
}

# ::tcltest::cleanupTests --
#
# Remove files and dirs created using the makeFile and makeDirectory
# commands since the last time this proc was invoked.
#
# Print the names of the files created without the makeFile command
# since the tests were invoked.
#
# Print the number tests (total, passed, failed, and skipped) since the
# tests were invoked.
# 
# Restore original environment (as reported by special variable env).

proc ::tcltest::cleanupTests {{calledFromAllFile 0}} {

    set testFileName [file tail [info script]]

    # Call the cleanup hook
    ::tcltest::cleanupTestsHook 

    # Remove files and directories created by the :tcltest::makeFile and
    # ::tcltest::makeDirectory procedures.
    # Record the names of files in ::tcltest::workingDirectory that were not
    # pre-existing, and associate them with the test file that created them.

    if {!$calledFromAllFile} {
	foreach file $::tcltest::filesMade {
	    if {[file exists $file]} {
		catch {file delete -force $file}
	    }
	}
	set currentFiles {}
	foreach file [glob -nocomplain \
		[file join $::tcltest::temporaryDirectory *]] {
	    lappend currentFiles [file tail $file]
	}
	set newFiles {}
	foreach file $currentFiles {
	    if {[lsearch -exact $::tcltest::filesExisted $file] == -1} {
		lappend newFiles $file
	    }
	}
	set ::tcltest::filesExisted $currentFiles
	if {[llength $newFiles] > 0} {
	    set ::tcltest::createdNewFiles($testFileName) $newFiles
	}
    }

    if {$calledFromAllFile || $::tcltest::testSingleFile} {

	# print stats

	puts -nonewline $::tcltest::outputChannel "$testFileName:"
	foreach index [list "Total" "Passed" "Skipped" "Failed"] {
	    puts -nonewline $::tcltest::outputChannel \
		    "\t$index\t$::tcltest::numTests($index)"
	}
	puts $::tcltest::outputChannel ""

	# print number test files sourced
	# print names of files that ran tests which failed

	if {$calledFromAllFile} {
	    puts $::tcltest::outputChannel \
		    "Sourced $::tcltest::numTestFiles Test Files."
	    set ::tcltest::numTestFiles 0
	    if {[llength $::tcltest::failFiles] > 0} {
		puts $::tcltest::outputChannel \
			"Files with failing tests: $::tcltest::failFiles"
		set ::tcltest::failFiles {}
	    }
	}

	# if any tests were skipped, print the constraints that kept them
	# from running.

	set constraintList [array names ::tcltest::skippedBecause]
	if {[llength $constraintList] > 0} {
	    puts $::tcltest::outputChannel \
		    "Number of tests skipped for each constraint:"
	    foreach constraint [lsort $constraintList] {
		puts $::tcltest::outputChannel \
			"\t$::tcltest::skippedBecause($constraint)\t$constraint"
		unset ::tcltest::skippedBecause($constraint)
	    }
	}

	# report the names of test files in ::tcltest::createdNewFiles, and
	# reset the array to be empty.

	set testFilesThatTurded [lsort [array names ::tcltest::createdNewFiles]]
	if {[llength $testFilesThatTurded] > 0} {
	    puts $::tcltest::outputChannel "Warning: files left behind:"
	    foreach testFile $testFilesThatTurded {
		puts $::tcltest::outputChannel \
			"\t$testFile:\t$::tcltest::createdNewFiles($testFile)"
		unset ::tcltest::createdNewFiles($testFile)
	    }
	}

	# reset filesMade, filesExisted, and numTests

	set ::tcltest::filesMade {}
	foreach index [list "Total" "Passed" "Skipped" "Failed"] {
	    set ::tcltest::numTests($index) 0
	}

	# exit only if running Tk in non-interactive mode

	global tk_version tcl_interactive
	if {[info exists tk_version] && ![info exists tcl_interactive]} {
	    exit
	}
    } else {

	# if we're deferring stat-reporting until all files are sourced,
	# then add current file to failFile list if any tests in this file
	# failed

	incr ::tcltest::numTestFiles
	if {($::tcltest::currentFailure) && \
		([lsearch -exact $::tcltest::failFiles $testFileName] == -1)} {
	    lappend ::tcltest::failFiles $testFileName
	}
	set ::tcltest::currentFailure false

	# restore the environment to the state it was in before this package
	# was loaded

	set newEnv {}
	set changedEnv {}
	set removedEnv {}
	foreach index [array names ::env] {
	    if {![info exists ::tcltest::originalEnv($index)]} {
		lappend newEnv $index
		unset ::env($index)
	    } else {
		if {$::env($index) != $::tcltest::originalEnv($index)} {
		    lappend changedEnv $index
		    set ::env($index) $::tcltest::originalEnv($index)
		}
	    }
	}
	foreach index [array names ::tcltest::originalEnv] {
	    if {![info exists ::env($index)]} {
		lappend removedEnv $index
		set ::env($index) $::tcltest::originalEnv($index)
	    }
	}
	if {[llength $newEnv] > 0} {
	    puts $::tcltest::outputChannel \
		    "env array elements created:\t$newEnv"
	}
	if {[llength $changedEnv] > 0} {
	    puts $::tcltest::outputChannel \
		    "env array elements changed:\t$changedEnv"
	}
	if {[llength $removedEnv] > 0} {
	    puts $::tcltest::outputChannel \
		    "env array elements removed:\t$removedEnv"
	}

	set changedTclPlatform {}
	foreach index [array names ::tcltest::originalTclPlatform] {
	    if {$::tcl_platform($index) != \
		    $::tcltest::originalTclPlatform($index)} { 
		lappend changedTclPlatform $index
		set ::tcl_platform($index) \
			$::tcltest::originalTclPlatform($index) 
	    }
	}
	if {[llength $changedTclPlatform] > 0} {
	    puts $::tcltest::outputChannel \
		    "tcl_platform array elements changed:\t$changedTclPlatform"
	} 

	if {[file exists [file join $::tcltest::workingDirectory core]]} {
	    if {$::tcltest::preserveCore > 1} {
		puts $::tcltest::outputChannel "produced core file! \
			Moving file to: \
			[file join $::tcltest::temporaryDirectory core-$name]"
		flush $::tcltest::outputChannel
		catch {file rename -force \
			[file join $::tcltest::workingDirectory core] \
			[file join $::tcltest::temporaryDirectory \
			core-$name]} msg
		if {[string length $msg] > 0} {
		    ::tcltest::PrintError "Problem renaming file: $msg"
		}
	    } else {
		# Print a message if there is a core file and (1) there
		# previously wasn't one or (2) the new one is different from
		# the old one. 

		if {[info exists ::tcltest::coreModificationTime]} {
		    if {$::tcltest::coreModificationTime != [file mtime \
			    [file join $::tcltest::workingDirectory core]]} {
			puts $::tcltest::outputChannel "A core file was created!"
		    }
		} else {
		    puts $::tcltest::outputChannel "A core file was created!"
		} 
	    }
	}
    }
}

# ::tcltest::cleanupTestsHook --
#
#	This hook allows a harness that builds upon tcltest to specify
#       additional things that should be done at cleanup.
#

if {[namespace inscope ::tcltest info procs cleanupTestsHook] == {}} {
    proc ::tcltest::cleanupTestsHook {} {}
}

# test --
#
# This procedure runs a test and prints an error message if the test fails.
# If ::tcltest::verbose has been set, it also prints a message even if the
# test succeeds.  The test will be skipped if it doesn't match the
# ::tcltest::match variable, if it matches an element in
# ::tcltest::skip, or if one of the elements of "constraints" turns
# out not to be true.
#
# Arguments:
# name -		Name of test, in the form foo-1.2.
# description -		Short textual description of the test, to
#			help humans understand what it does.
# constraints -		A list of one or more keywords, each of
#			which must be the name of an element in
#			the array "::tcltest::testConstraints".  If any of these
#			elements is zero, the test is skipped.
#			This argument may be omitted.
# script -		Script to run to carry out the test.  It must
#			return a result that can be checked for
#			correctness.
# expectedAnswer -	Expected result from script.

proc ::tcltest::test {name description script expectedAnswer args} {

    DebugPuts 3 "Running $name ($description)"

    incr ::tcltest::numTests(Total)

    # skip the test if it's name matches an element of skip

    foreach pattern $::tcltest::skip {
	if {[string match $pattern $name]} {
	    incr ::tcltest::numTests(Skipped)
	    DebugDo 1 {::tcltest::AddToSkippedBecause userSpecifiedSkip}
	    return
	}
    }

    # skip the test if it's name doesn't match any element of match

    if {[llength $::tcltest::match] > 0} {
	set ok 0
	foreach pattern $::tcltest::match {
	    if {[string match $pattern $name]} {
		set ok 1
		break
	    }
        }
	if {!$ok} {
	    incr ::tcltest::numTests(Skipped)
	    DebugDo 1 {::tcltest::AddToSkippedBecause userSpecifiedNonMatch}
	    return
	}
    }

    set i [llength $args]
    if {$i == 0} {
	set constraints {}
	# If we're limited to the listed constraints and there aren't any
	# listed, then we shouldn't run the test.
	if {$::tcltest::limitConstraints} {
	    ::tcltest::AddToSkippedBecause userSpecifiedLimitConstraint
	    incr ::tcltest::numTests(Skipped)
	    return
	}
    } elseif {$i == 1} {

	# "constraints" argument exists;  shuffle arguments down, then
	# make sure that the constraints are satisfied.

	set constraints $script
	set script $expectedAnswer
	set expectedAnswer [lindex $args 0]
	set doTest 0
	if {[string match {*[$\[]*} $constraints] != 0} {
	    # full expression, e.g. {$foo > [info tclversion]}
	    catch {set doTest [uplevel #0 expr $constraints]}
	} elseif {[regexp {[^.a-zA-Z0-9 ]+} $constraints] != 0} {
	    # something like {a || b} should be turned into 
	    # $::tcltest::testConstraints(a) || $::tcltest::testConstraints(b).
 	    regsub -all {[.\w]+} $constraints \
		    {$::tcltest::testConstraints(&)} c
	    catch {set doTest [eval expr $c]}
	} else {
	    # just simple constraints such as {unixOnly fonts}.
	    set doTest 1
	    foreach constraint $constraints {
		if {(![info exists ::tcltest::testConstraints($constraint)]) \
			|| (!$::tcltest::testConstraints($constraint))} {
		    set doTest 0

		    # store the constraint that kept the test from running
		    set constraints $constraint
		    break
		}
	    }
	}
	if {$doTest == 0} {
	    if {[string first s $::tcltest::verbose] != -1} {
		puts $::tcltest::outputChannel "++++ $name SKIPPED: $constraints"
	    }

	    incr ::tcltest::numTests(Skipped)
	    ::tcltest::AddToSkippedBecause $constraints
	    return	
	}
    } else {
	error "wrong # args: must be \"test name description ?constraints? script expectedAnswer\""
    }   

    # Save information about the core file.  You need to restore the original
    # tcl_platform environment because some of the tests mess with tcl_platform.

    if {$::tcltest::preserveCore} {
	set currentTclPlatform [array get tcl_platform]
	array set tcl_platform $::tcltest::originalTclPlatform
	if {[file exists [file join $::tcltest::workingDirectory core]]} {
	    set coreModTime [file mtime [file join \
		    $::tcltest::workingDirectory core]]
	}
	array set tcl_platform $currentTclPlatform
    }

    # If there is no "memory" command (because memory debugging isn't
    # enabled), then don't attempt to use the command.
    
    if {[info commands memory] != {}} {
	memory tag $name
    }

    set code [catch {uplevel $script} actualAnswer]
    if {([string equal $actualAnswer $expectedAnswer]) && ($code == 0)} {
	incr ::tcltest::numTests(Passed)
	if {[string first p $::tcltest::verbose] != -1} {
	    puts $::tcltest::outputChannel "++++ $name PASSED"
	}
    } else {
	incr ::tcltest::numTests(Failed)
	set ::tcltest::currentFailure true
	if {[string first b $::tcltest::verbose] == -1} {
	    set script ""
	}
	puts $::tcltest::outputChannel "\n==== $name $description FAILED"
	if {$script != ""} {
	    puts $::tcltest::outputChannel "==== Contents of test case:"
	    puts $::tcltest::outputChannel $script
	}
	if {$code != 0} {
	    if {$code == 1} {
		puts $::tcltest::outputChannel "==== Test generated error:"
		puts $::tcltest::outputChannel $actualAnswer
	    } elseif {$code == 2} {
		puts $::tcltest::outputChannel "==== Test generated return exception;  result was:"
		puts $::tcltest::outputChannel $actualAnswer
	    } elseif {$code == 3} {
		puts $::tcltest::outputChannel "==== Test generated break exception"
	    } elseif {$code == 4} {
		puts $::tcltest::outputChannel "==== Test generated continue exception"
	    } else {
		puts $::tcltest::outputChannel "==== Test generated exception $code;  message was:"
		puts $::tcltest::outputChannel $actualAnswer
	    }
	} else {
	    puts $::tcltest::outputChannel "---- Result was:\n$actualAnswer"
	}
	puts $::tcltest::outputChannel "---- Result should have been:\n$expectedAnswer"
	puts $::tcltest::outputChannel "==== $name FAILED\n"
    }
    if {$::tcltest::preserveCore} {
	set currentTclPlatform [array get tcl_platform]
	if {[file exists [file join $::tcltest::workingDirectory core]]} {
	    if {$::tcltest::preserveCore > 1} {
		puts $::tcltest::outputChannel "==== $name produced core file! \
			Moving file to: \
			[file join $::tcltest::temporaryDirectory core-$name]"
		catch {file rename -force \
			[file join $::tcltest::workingDirectory core] \
			[file join $::tcltest::temporaryDirectory \
			core-$name]} msg
		if {[string length $msg] > 0} {
		    ::tcltest::PrintError "Problem renaming file: $msg"
		}
	    } else {
		# Print a message if there is a core file and (1) there
		# previously wasn't one or (2) the new one is different from
		# the old one. 

		if {[info exists coreModTime]} {
		    if {$coreModTime != [file mtime \
			    [file join $::tcltest::workingDirectory core]]} {
			puts $::tcltest::outputChannel "==== $name produced core file!"
		    }
		} else {
		    puts $::tcltest::outputChannel "==== $name produced core file!"
		} 
	    }
	}
	array set tcl_platform $currentTclPlatform
    }
}

# ::tcltest::getMatchingFiles
#
#       Looks at the patterns given to match and skip files
#       and uses them to put together a list of the tests that will be run.
#
# Arguments:
#       none
#
# Results:
#       The constructed list is returned to the user.  This will primarily
#       be used in 'all.tcl' files.

proc ::tcltest::getMatchingFiles {args} {
    set matchingFiles {}
    if {[llength $args] > 0} {
	set searchDirectory $args
    } else {
	set searchDirectory $::tcltest::testsDirectory
    }
    # Find the matching files in the list of directories and then remove the
    # ones that match the skip pattern
    foreach directory $searchDirectory {
	set matchFileList {}
	foreach match $::tcltest::matchFiles {
	    set matchFileList [concat $matchFileList \
		    [glob -nocomplain [file join $directory $match]]]
	}
	if {$::tcltest::skipFiles != {}} {
	    set skipFileList {}
	    foreach skip $::tcltest::skipFiles {
		set skipFileList [concat $skipFileList \
			[glob -nocomplain [file join $directory $skip]]]
	    }
	    foreach file $matchFileList {
		# Only include files that don't match the skip pattern and
		# aren't SCCS lock files.
		if {([lsearch -exact $skipFileList $file] == -1) && \
			(![string match l.*.test [file tail $file]])} {
		    lappend matchingFiles $file
		}
	    }   
	} else {
	    set matchingFiles [concat $matchingFiles $matchFileList]
	}
    }
    if {$matchingFiles == {}} {
	::tcltest::PrintError "No test files remain after applying \
		your match and skip patterns!"
    }
    return $matchingFiles
}

# The following two procs are used in the io tests.

proc ::tcltest::openfiles {} {
    if {[catch {testchannel open} result]} {
	return {}
    }
    return $result
}

proc ::tcltest::leakfiles {old} {
    if {[catch {testchannel open} new]} {
        return {}
    }
    set leak {}
    foreach p $new {
    	if {[lsearch $old $p] < 0} {
	    lappend leak $p
	}
    }
    return $leak
}

# ::tcltest::saveState --
#
#	Save information regarding what procs and variables exist.
#
# Arguments:
#	none
#
# Results:
#	Modifies the variable ::tcltest::saveState

proc ::tcltest::saveState {} {
    uplevel #0 {set ::tcltest::saveState [list [info procs] [info vars]]}
    DebugPuts  2 "::tcltest::saveState: $::tcltest::saveState"
}

# ::tcltest::restoreState --
#
#	Remove procs and variables that didn't exist before the call to
#       ::tcltest::saveState.
#
# Arguments:
#	none
#
# Results:
#	Removes procs and variables from your environment if they don't exist
#       in the ::tcltest::saveState variable.

proc ::tcltest::restoreState {} {
    foreach p [info procs] {
	if {([lsearch [lindex $::tcltest::saveState 0] $p] < 0) && \
		(![string equal ::tcltest::$p [namespace origin $p]])} {
	    
	    DebugPuts 3 "::tcltest::restoreState: Removing proc $p"
	    rename $p {}
	}
    }
    foreach p [uplevel #0 {info vars}] {
	if {[lsearch [lindex $::tcltest::saveState 1] $p] < 0} {
	    DebugPuts 3 "::tcltest::restoreState: Removing variable $p"
	    uplevel #0 "catch {unset $p}"
	}
    }
}

# ::tcltest::normalizeMsg --
#
#	Removes "extra" newlines from a string.
#
# Arguments:
#	msg        String to be modified
#

proc ::tcltest::normalizeMsg {msg} {
    regsub "\n$" [string tolower $msg] "" msg
    regsub -all "\n\n" $msg "\n" msg
    regsub -all "\n\}" $msg "\}" msg
    return $msg
}

# makeFile --
#
# Create a new file with the name <name>, and write <contents> to it.
#
# If this file hasn't been created via makeFile since the last time
# cleanupTests was called, add it to the $filesMade list, so it will
# be removed by the next call to cleanupTests.
#
proc ::tcltest::makeFile {contents name} {
    global tcl_platform
    
    DebugPuts 3 "::tcltest::makeFile: putting $contents into $name"

    set fullName [file join $::tcltest::temporaryDirectory $name]
    set fd [open $fullName w]

    fconfigure $fd -translation lf

    if {[string equal [string index $contents end] "\n"]} {
	puts -nonewline $fd $contents
    } else {
	puts $fd $contents
    }
    close $fd

    if {[lsearch -exact $::tcltest::filesMade $fullName] == -1} {
	lappend ::tcltest::filesMade $fullName
    }
    return $fullName
}

# ::tcltest::removeFile --
#
#	Removes the named file from the filesystem
#
# Arguments:
#	name     file to be removed
#

proc ::tcltest::removeFile {name} {
    DebugPuts 3 "::tcltest::removeFile: removing $name"
    file delete [file join $::tcltest::temporaryDirectory $name]
}

# makeDirectory --
#
# Create a new dir with the name <name>.
#
# If this dir hasn't been created via makeDirectory since the last time
# cleanupTests was called, add it to the $directoriesMade list, so it will
# be removed by the next call to cleanupTests.
#
proc ::tcltest::makeDirectory {name} {
    file mkdir $name

    set fullName [file join [pwd] $name]
    if {[lsearch -exact $::tcltest::filesMade $fullName] == -1} {
	lappend ::tcltest::filesMade $fullName
    }
}

# ::tcltest::removeDirectory --
#
#	Removes a named directory from the file system.
#
# Arguments:
#	name    Name of the directory to remove
#

proc ::tcltest::removeDirectory {name} {
    file delete -force $name
}

proc ::tcltest::viewFile {name} {
    global tcl_platform
    if {([string equal $tcl_platform(platform) "macintosh"]) || \
	    ($::tcltest::testConstraints(unixExecs) == 0)} {
	set f [open [file join $::tcltest::temporaryDirectory $name]]
	set data [read -nonewline $f]
	close $f
	return $data
    } else {
	exec cat [file join $::tcltest::temporaryDirectory $name]
    }
}

# grep --
#
# Evaluate a given expression against each element of a list and return all
# elements for which the expression evaluates to true.  For the purposes of
# this proc, use of the keyword "CURRENT_ELEMENT" will flag the proc to use the
# value of the current element within the expression.  This is equivalent to
# the perl grep command where CURRENT_ELEMENT would be the name for the special
# variable $_.
#
# Examples of usage would be:
#   set subList [grep {CURRENT_ELEMENT == 1} $listOfNumbers]
#   set subList [grep {regexp {abc} CURRENT_ELEMENT} $listOfStrings]
#
# Use of the CURRENT_ELEMENT keyword is optional.  If it is left out, it is
# assumed to be the final argument to the expression provided.
# 
# Example:
#   grep {regexp a} $someList   
#
proc ::tcltest::grep { expression searchList } {
    foreach element $searchList {
	if {[regsub -all CURRENT_ELEMENT $expression $element \
		newExpression] == 0} { 
	    set newExpression "$expression {$element}"
	}
	if {[eval $newExpression] == 1} {
	    lappend returnList $element
	}
    }
    if {[info exists returnList]} {
	return $returnList
    }
    return
}

#
# Construct a string that consists of the requested sequence of bytes,
# as opposed to a string of properly formed UTF-8 characters.  
# This allows the tester to 
# 1. Create denormalized or improperly formed strings to pass to C procedures 
#    that are supposed to accept strings with embedded NULL bytes.
# 2. Confirm that a string result has a certain pattern of bytes, for instance
#    to confirm that "\xe0\0" in a Tcl script is stored internally in 
#    UTF-8 as the sequence of bytes "\xc3\xa0\xc0\x80".
#
# Generally, it's a bad idea to examine the bytes in a Tcl string or to
# construct improperly formed strings in this manner, because it involves
# exposing that Tcl uses UTF-8 internally.

proc ::tcltest::bytestring {string} {
    encoding convertfrom identity $string
}

#
# Internationalization / ISO support procs     -- dl
#
proc ::tcltest::set_iso8859_1_locale {} {
    if {[info commands testlocale] != ""} {
	set ::tcltest::previousLocale [testlocale ctype]
	testlocale ctype $::tcltest::isoLocale
    }
    return
}

proc ::tcltest::restore_locale {} {
    if {[info commands testlocale] != ""} {
	testlocale ctype $::tcltest::previousLocale
    }
    return
}

# threadReap --
#
#	Kill all threads except for the main thread.
#	Do nothing if testthread is not defined.
#
# Arguments:
#	none.
#
# Results:
#	Returns the number of existing threads.
proc ::tcltest::threadReap {} {
    if {[info commands testthread] != {}} {
	testthread errorproc ThreadNullError
	while {[llength [testthread names]] > 1} {
	    foreach tid [testthread names] {
		if {$tid != $::tcltest::mainThread} {
		    catch {testthread send -async $tid {testthread exit}}
		}
	    }
	    ## Enter a bit a sleep to give the threads enough breathing
	    ## room to kill themselves off, otherwise the end up with a
	    ## massive queue of repeated events
	    after 1
	}
	testthread errorproc ThreadError
	return [llength [testthread names]]
    } else {
	return 1
    }
}

# Initialize the constraints and set up command line arguments 
namespace eval tcltest {
    # Ensure that we have a minimal auto_path so we don't pick up extra junk.
    set ::auto_path [list [info library]]

    ::tcltest::initConstraints
    if {[namespace children ::tcltest] == {}} {
	::tcltest::processCmdLineArgs
    }
}