summaryrefslogtreecommitdiff
path: root/src/engine/SCons/Node/NodeTests.py
blob: 7082a74e0edd058b8d841b1ac9d9e18b2205cc78 (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
#
# Copyright (c) 2001 - 2015 The SCons Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

__revision__ = "src/engine/SCons/Node/NodeTests.py rel_2.4.1:3453:73fefd3ea0b0 2015/11/09 03:25:05 bdbaddog"

import SCons.compat

import collections
import os
import re
import sys
import unittest

import TestUnit

import SCons.Errors
import SCons.Node
import SCons.Util



built_it = None
built_target =  None
built_source =  None
cycle_detected = None
built_order = 0

def _actionAppend(a1, a2):
    all = []
    for curr_a in [a1, a2]:
        if isinstance(curr_a, MyAction):
            all.append(curr_a)
        elif isinstance(curr_a, MyListAction):
            all.extend(curr_a.list)
        elif isinstance(curr_a, list):
            all.extend(curr_a)
        else:
            raise Exception('Cannot Combine Actions')
    return MyListAction(all)

class MyActionBase(object):
    def __add__(self, other):
        return _actionAppend(self, other)

    def __radd__(self, other):
        return _actionAppend(other, self)

class MyAction(MyActionBase):
    def __init__(self):
        self.order = 0

    def __call__(self, target, source, env, executor=None):
        global built_it, built_target, built_source, built_args, built_order
        if executor:
            target = executor.get_all_targets()
            source = executor.get_all_sources()
        built_it = 1
        built_target = target
        built_source = source
        built_args = env
        built_order = built_order + 1
        self.order = built_order
        return 0

    def get_implicit_deps(self, target, source, env):
        return []

class MyExecutor(object):
    def __init__(self, env=None, targets=[], sources=[]):
        self.env = env
        self.targets = targets
        self.sources = sources
    def get_build_env(self):
        return self.env
    def get_build_scanner_path(self, scanner):
        return 'executor would call %s' % scanner
    def cleanup(self):
        self.cleaned_up = 1
    def scan_targets(self, scanner):
        if not scanner:
            return
        d = scanner(self.targets)
        for t in self.targets:
            t.implicit.extend(d)
    def scan_sources(self, scanner):
        if not scanner:
            return
        d = scanner(self.sources)
        for t in self.targets:
            t.implicit.extend(d)

class MyListAction(MyActionBase):
    def __init__(self, list):
        self.list = list
    def __call__(self, target, source, env):
        for A in self.list:
            A(target, source, env)

class Environment(object):
    def __init__(self, **kw):
        self._dict = {}
        self._dict.update(kw)
    def __getitem__(self, key):
        return self._dict[key]
    def Dictionary(self, *args):
        return {}
    def Override(self, overrides):
        d = self._dict.copy()
        d.update(overrides)
        return Environment(**d)
    def _update(self, dict):
        self._dict.update(dict)
    def get_factory(self, factory):
        return factory or MyNode
    def get_scanner(self, scanner_key):
        return self._dict['SCANNERS'][0]

class Builder(object):
    def __init__(self, env=None, is_explicit=1):
        if env is None: env = Environment()
        self.env = env
        self.overrides = {}
        self.action = MyAction()
        self.source_factory = MyNode
        self.is_explicit = is_explicit
        self.target_scanner = None
        self.source_scanner = None
    def targets(self, t):
        return [t]
    def get_actions(self):
        return [self.action]
    def get_contents(self, target, source, env):
        return 7

class NoneBuilder(Builder):
    def execute(self, target, source, env):
        Builder.execute(self, target, source, env)
        return None

class ListBuilder(Builder):
    def __init__(self, *nodes):
        Builder.__init__(self)
        self.nodes = nodes
    def execute(self, target, source, env):
        if hasattr(self, 'status'):
            return self.status
        for n in self.nodes:
            n.prepare()
        target = self.nodes[0]
        self.status = Builder.execute(self, target, source, env)

class FailBuilder(object):
    def execute(self, target, source, env):
        return 1

class ExceptBuilder(object):
    def execute(self, target, source, env):
        raise SCons.Errors.BuildError

class ExceptBuilder2(object):
    def execute(self, target, source, env):
        raise Exception("foo")

class Scanner(object):
    called = None
    def __call__(self, node):
        self.called = 1
        return node.GetTag('found_includes')
    def path(self, env, dir, target=None, source=None):
        return ()
    def select(self, node):
        return self
    def recurse_nodes(self, nodes):
        return nodes

class MyNode(SCons.Node.Node):
    """The base Node class contains a number of do-nothing methods that
    we expect to be overridden by real, functional Node subclasses.  So
    simulate a real, functional Node subclass.
    """
    def __init__(self, name):
        SCons.Node.Node.__init__(self)
        self.name = name
        self.Tag('found_includes', [])
    def __str__(self):
        return self.name
    def get_found_includes(self, env, scanner, target):
        return scanner(self)

class Calculator(object):
    def __init__(self, val):
        self.max_drift = 0
        class M(object):
            def __init__(self, val):
                self.val = val
            def signature(self, args):
                return self.val
            def collect(self, args):
                result = self.val
                for a in args:
                    result += a
                return result
        self.module = M(val)



class NodeInfoBaseTestCase(unittest.TestCase):
    # The abstract class NodeInfoBase has not enough default slots to perform
    # the merge and format test (arbitrary attributes do not work). Do it with a
    # derived class that does provide the slots.

    def test_merge(self):
        """Test merging NodeInfoBase attributes"""

        class TestNodeInfo(SCons.Node.NodeInfoBase):
            __slots__ = ('a1', 'a2', 'a3')

        ni1 = TestNodeInfo()
        ni2 = TestNodeInfo()

        ni1.a1 = 1
        ni1.a2 = 2

        ni2.a2 = 222
        ni2.a3 = 333

        ni1.merge(ni2)
        assert ni1.a1 == 1, ni1.a1
        assert ni1.a2 == 222, ni1.a2
        assert ni1.a3 == 333, ni1.a3

    def test_update(self):
        """Test the update() method"""
        ni = SCons.Node.NodeInfoBase()
        ni.update(SCons.Node.Node())

    def test_format(self):
        """Test the NodeInfoBase.format() method"""

        class TestNodeInfo(SCons.Node.NodeInfoBase):
            __slots__ = ('xxx', 'yyy', 'zzz')

        ni1 = TestNodeInfo()
        ni1.xxx = 'x'
        ni1.yyy = 'y'
        ni1.zzz = 'z'

        f = ni1.format()
        assert f == ['x', 'y', 'z'], f
 
        field_list = ['xxx', 'zzz', 'aaa']

        f = ni1.format(field_list)
        assert f == ['x', 'z', 'None'], f



class BuildInfoBaseTestCase(unittest.TestCase):

    def test___init__(self):
        """Test BuildInfoBase initialization"""
        n = SCons.Node.Node()
        bi = SCons.Node.BuildInfoBase()
        assert bi

    def test_merge(self):
        """Test merging BuildInfoBase attributes"""
        n1 = SCons.Node.Node()
        bi1 = SCons.Node.BuildInfoBase()
        n2 = SCons.Node.Node()
        bi2 = SCons.Node.BuildInfoBase()

        bi1.bsources = 1
        bi1.bdepends = 2

        bi2.bdepends = 222
        bi2.bact = 333

        bi1.merge(bi2)
        assert bi1.bsources == 1, bi1.bsources
        assert bi1.bdepends == 222, bi1.bdepends
        assert bi1.bact == 333, bi1.bact


class NodeTestCase(unittest.TestCase):

    def test_build(self):
        """Test building a node
        """
        global built_it, built_order

        # Make sure it doesn't blow up if no builder is set.
        node = MyNode("www")
        node.build()
        assert built_it is None
        node.build(extra_kw_argument = 1)
        assert built_it is None

        node = MyNode("xxx")
        node.builder_set(Builder())
        node.env_set(Environment())
        node.path = "xxx"
        node.sources = ["yyy", "zzz"]
        node.build()
        assert built_it
        assert built_target == [node], built_target
        assert built_source == ["yyy", "zzz"], built_source

        built_it = None
        node = MyNode("qqq")
        node.builder_set(NoneBuilder())
        node.env_set(Environment())
        node.path = "qqq"
        node.sources = ["rrr", "sss"]
        node.builder.overrides = { "foo" : 1, "bar" : 2 }
        node.build()
        assert built_it
        assert built_target == [node], built_target
        assert built_source == ["rrr", "sss"], built_source
        assert built_args["foo"] == 1, built_args
        assert built_args["bar"] == 2, built_args

        fff = MyNode("fff")
        ggg = MyNode("ggg")
        lb = ListBuilder(fff, ggg)
        e = Environment()
        fff.builder_set(lb)
        fff.env_set(e)
        fff.path = "fff"
        ggg.builder_set(lb)
        ggg.env_set(e)
        ggg.path = "ggg"
        fff.sources = ["hhh", "iii"]
        ggg.sources = ["hhh", "iii"]
        # [Charles C. 1/7/2002] Uhhh, why are there no asserts here?
        # [SK, 15 May 2003] I dunno, let's add some...
        built_it = None
        fff.build()
        assert built_it
        assert built_target == [fff], built_target
        assert built_source == ["hhh", "iii"], built_source
        built_it = None
        ggg.build()
        assert built_it
        assert built_target == [ggg], built_target
        assert built_source == ["hhh", "iii"], built_source

        built_it = None
        jjj = MyNode("jjj")
        b = Builder()
        jjj.builder_set(b)
        # NOTE:  No env_set()!  We should pull the environment from the builder.
        b.env = Environment()
        b.overrides = { "on" : 3, "off" : 4 }
        e.builder = b
        jjj.build()
        assert built_it
        assert built_target[0] == jjj, built_target[0]
        assert built_source == [], built_source
        assert built_args["on"] == 3, built_args
        assert built_args["off"] == 4, built_args

    def test_get_build_scanner_path(self):
        """Test the get_build_scanner_path() method"""
        n = SCons.Node.Node()
        x = MyExecutor()
        n.set_executor(x)
        p = n.get_build_scanner_path('fake_scanner')
        assert p == "executor would call fake_scanner", p

    def test_get_executor(self):
        """Test the get_executor() method"""
        n = SCons.Node.Node()

        try:
            n.get_executor(0)
        except AttributeError:
            pass
        else:
            self.fail("did not catch expected AttributeError")

        class Builder(object):
            action = 'act'
            env = 'env1'
            overrides = {}

        n = SCons.Node.Node()
        n.builder_set(Builder())
        x = n.get_executor()
        assert x.env == 'env1', x.env

        n = SCons.Node.Node()
        n.builder_set(Builder())
        n.env_set('env2')
        x = n.get_executor()
        assert x.env == 'env2', x.env

    def test_set_executor(self):
        """Test the set_executor() method"""
        n = SCons.Node.Node()
        n.set_executor(1)
        assert n.executor == 1, n.executor

    def test_executor_cleanup(self):
        """Test letting the executor cleanup its cache"""
        n = SCons.Node.Node()
        x = MyExecutor()
        n.set_executor(x)
        n.executor_cleanup()
        assert x.cleaned_up

    def test_reset_executor(self):
        """Test the reset_executor() method"""
        n = SCons.Node.Node()
        n.set_executor(1)
        assert n.executor == 1, n.executor
        n.reset_executor()
        assert not hasattr(n, 'executor'), "unexpected executor attribute"

    def test_built(self):
        """Test the built() method"""
        class SubNodeInfo(SCons.Node.NodeInfoBase):
            __slots__ = ('updated',)
            def update(self, node):
                self.updated = 1
        class SubNode(SCons.Node.Node):
            def clear(self):
                self.cleared = 1

        n = SubNode()
        n.ninfo = SubNodeInfo()
        n.built()
        assert n.cleared, n.cleared
        assert n.ninfo.updated, n.ninfo.cleared

    def test_push_to_cache(self):
        """Test the base push_to_cache() method"""
        n = SCons.Node.Node()
        r = n.push_to_cache()
        assert r is None, r

    def test_retrieve_from_cache(self):
        """Test the base retrieve_from_cache() method"""
        n = SCons.Node.Node()
        r = n.retrieve_from_cache()
        assert r == 0, r

    def test_visited(self):
        """Test the base visited() method

        Just make sure it's there and we can call it.
        """
        n = SCons.Node.Node()
        n.visited()

    def test_builder_set(self):
        """Test setting a Node's Builder
        """
        node = SCons.Node.Node()
        b = Builder()
        node.builder_set(b)
        assert node.builder == b

    def test_has_builder(self):
        """Test the has_builder() method
        """
        n1 = SCons.Node.Node()
        assert n1.has_builder() == 0
        n1.builder_set(Builder())
        assert n1.has_builder() == 1

    def test_has_explicit_builder(self):
        """Test the has_explicit_builder() method
        """
        n1 = SCons.Node.Node()
        assert not n1.has_explicit_builder()
        n1.set_explicit(1)
        assert n1.has_explicit_builder()
        n1.set_explicit(None)
        assert not n1.has_explicit_builder()

    def test_get_builder(self):
        """Test the get_builder() method"""
        n1 = SCons.Node.Node()
        b = n1.get_builder()
        assert b is None, b
        b = n1.get_builder(777)
        assert b == 777, b
        n1.builder_set(888)
        b = n1.get_builder()
        assert b == 888, b
        b = n1.get_builder(999)
        assert b == 888, b

    def test_multiple_side_effect_has_builder(self):
        """Test the multiple_side_effect_has_builder() method
        """
        n1 = SCons.Node.Node()
        assert n1.multiple_side_effect_has_builder() == 0
        n1.builder_set(Builder())
        assert n1.multiple_side_effect_has_builder() == 1

    def test_is_derived(self):
        """Test the is_derived() method
        """
        n1 = SCons.Node.Node()
        n2 = SCons.Node.Node()
        n3 = SCons.Node.Node()

        n2.builder_set(Builder())
        n3.side_effect = 1

        assert n1.is_derived() == 0
        assert n2.is_derived() == 1
        assert n3.is_derived() == 1

    def test_alter_targets(self):
        """Test the alter_targets() method
        """
        n = SCons.Node.Node()
        t, m = n.alter_targets()
        assert t == [], t
        assert m is None, m

    def test_is_up_to_date(self):
        """Test the default is_up_to_date() method
        """
        node = SCons.Node.Node()
        assert node.is_up_to_date() is None

    def test_children_are_up_to_date(self):
        """Test the children_are_up_to_date() method used by subclasses
        """
        n1 = SCons.Node.Node()
        n2 = SCons.Node.Node()

        n1.add_source([n2])
        assert n1.children_are_up_to_date(), "expected up to date"
        n2.set_state(SCons.Node.executed)
        assert not n1.children_are_up_to_date(), "expected not up to date"
        n2.set_state(SCons.Node.up_to_date)
        assert n1.children_are_up_to_date(), "expected up to date"
        n1.always_build = 1
        assert not n1.children_are_up_to_date(), "expected not up to date"

    def test_env_set(self):
        """Test setting a Node's Environment
        """
        node = SCons.Node.Node()
        e = Environment()
        node.env_set(e)
        assert node.env == e

    def test_get_actions(self):
        """Test fetching a Node's action list
        """
        node = SCons.Node.Node()
        node.builder_set(Builder())
        a = node.builder.get_actions()
        assert isinstance(a[0], MyAction), a[0]

    def test_get_csig(self):
        """Test generic content signature calculation
        """
        
        class TestNodeInfo(SCons.Node.NodeInfoBase):
            __slots__ = ('csig',)
        try:
            SCons.Node.Node.NodeInfo = TestNodeInfo
            def my_contents(obj):
                return 444
            SCons.Node._get_contents_map[4] = my_contents
            node = SCons.Node.Node()
            node._func_get_contents = 4
            result = node.get_csig()
            assert result == '550a141f12de6341fba65b0ad0433500', result
        finally:
            SCons.Node.Node.NodeInfo = SCons.Node.NodeInfoBase

    def test_get_cachedir_csig(self):
        """Test content signature calculation for CacheDir
        """
        class TestNodeInfo(SCons.Node.NodeInfoBase):
            __slots__ = ('csig',)
        try:
            SCons.Node.Node.NodeInfo = TestNodeInfo
            def my_contents(obj):
                return 555
            SCons.Node._get_contents_map[4] = my_contents
            node = SCons.Node.Node()
            node._func_get_contents = 4
            result = node.get_cachedir_csig()
            assert result == '15de21c670ae7c3f6f3f1f37029303c9', result
        finally:
            SCons.Node.Node.NodeInfo = SCons.Node.NodeInfoBase

    def test_get_binfo(self):
        """Test fetching/creating a build information structure
        """
        class TestNodeInfo(SCons.Node.NodeInfoBase):
            __slots__ = ('csig',)
        SCons.Node.Node.NodeInfo = TestNodeInfo
        node = SCons.Node.Node()
 
        binfo = node.get_binfo()
        assert isinstance(binfo, SCons.Node.BuildInfoBase), binfo

        node = SCons.Node.Node()
        d = SCons.Node.Node()
        ninfo = d.get_ninfo()
        assert isinstance(ninfo, SCons.Node.NodeInfoBase), ninfo
        i = SCons.Node.Node()
        ninfo = i.get_ninfo()
        assert isinstance(ninfo, SCons.Node.NodeInfoBase), ninfo
        node.depends = [d]
        node.implicit = [i]

        binfo = node.get_binfo()
        assert isinstance(binfo, SCons.Node.BuildInfoBase), binfo
        assert hasattr(binfo, 'bsources')
        assert hasattr(binfo, 'bsourcesigs')
        assert binfo.bdepends == [d]
        assert hasattr(binfo, 'bdependsigs')
        assert binfo.bimplicit == [i]
        assert hasattr(binfo, 'bimplicitsigs')

    def test_explain(self):
        """Test explaining why a Node must be rebuilt
        """
        class testNode(SCons.Node.Node):
            def __str__(self): return 'xyzzy'
        node = testNode()
        node.exists = lambda: None
        # Can't do this with new-style classes (python bug #1066490)
        #node.__str__ = lambda: 'xyzzy'
        result = node.explain()
        assert result == "building `xyzzy' because it doesn't exist\n", result

        class testNode2(SCons.Node.Node):
            def __str__(self): return 'null_binfo'
        class FS(object):
            pass
        node = testNode2()
        node.fs = FS()
        node.fs.Top = SCons.Node.Node()
        result = node.explain()
        assert result is None, result

        def get_null_info():
            class Null_SConsignEntry(object):
                class Null_BuildInfo(object):
                    def prepare_dependencies(self):
                        pass
                binfo = Null_BuildInfo()
            return Null_SConsignEntry()

        node.get_stored_info = get_null_info
        #see above: node.__str__ = lambda: 'null_binfo'
        result = node.explain()
        assert result == "Cannot explain why `null_binfo' is being rebuilt: No previous build information found\n", result

        # XXX additional tests for the guts of the functionality some day

    #def test_del_binfo(self):
    #    """Test deleting the build information from a Node
    #    """
    #    node = SCons.Node.Node()
    #    node.binfo = None
    #    node.del_binfo()
    #    assert not hasattr(node, 'binfo'), node

    def test_store_info(self):
        """Test calling the method to store build information
        """
        node = SCons.Node.Node()
        SCons.Node.store_info_map[node.store_info](node)

    def test_get_stored_info(self):
        """Test calling the method to fetch stored build information
        """
        node = SCons.Node.Node()
        result = node.get_stored_info()
        assert result is None, result

    def test_set_always_build(self):
        """Test setting a Node's always_build value
        """
        node = SCons.Node.Node()
        node.set_always_build()
        assert node.always_build
        node.set_always_build(3)
        assert node.always_build == 3

    def test_set_noclean(self):
        """Test setting a Node's noclean value
        """
        node = SCons.Node.Node()
        node.set_noclean()
        assert node.noclean == 1, node.noclean
        node.set_noclean(7)
        assert node.noclean == 1, node.noclean
        node.set_noclean(0)
        assert node.noclean == 0, node.noclean
        node.set_noclean(None)
        assert node.noclean == 0, node.noclean

    def test_set_precious(self):
        """Test setting a Node's precious value
        """
        node = SCons.Node.Node()
        node.set_precious()
        assert node.precious
        node.set_precious(7)
        assert node.precious == 7

    def test_set_pseudo(self):
        """Test setting a Node's pseudo value
        """
        node = SCons.Node.Node()
        node.set_pseudo()
        assert node.pseudo
        node.set_pseudo(False)
        assert not node.pseudo

    def test_exists(self):
        """Test evaluating whether a Node exists.
        """
        node = SCons.Node.Node()
        e = node.exists()
        assert e == 1, e

    def test_exists(self):
        """Test evaluating whether a Node exists locally or in a repository.
        """
        node = SCons.Node.Node()
        e = node.rexists()
        assert e == 1, e

        class MyNode(SCons.Node.Node):
            def exists(self):
                return 'xyz'

        node = MyNode()
        e = node.rexists()
        assert e == 'xyz', e

    def test_prepare(self):
        """Test preparing a node to be built

        By extension, this also tests the missing() method.
        """
        node = SCons.Node.Node()

        n1 = SCons.Node.Node()
        n1.builder_set(Builder())
        node.implicit = []
        node.implicit_set = set()
        node._add_child(node.implicit, node.implicit_set, [n1])

        node.prepare()  # should not throw an exception

        n2 = SCons.Node.Node()
        n2.linked = 1
        node.implicit = []
        node.implicit_set = set()
        node._add_child(node.implicit, node.implicit_set, [n2])

        node.prepare()  # should not throw an exception

        n3 = SCons.Node.Node()
        node.implicit = []
        node.implicit_set = set()
        node._add_child(node.implicit, node.implicit_set, [n3])

        node.prepare()  # should not throw an exception

        class MyNode(SCons.Node.Node):
            def rexists(self):
                return None
        n4 = MyNode()
        node.implicit = []
        node.implicit_set = set()
        node._add_child(node.implicit, node.implicit_set, [n4])
        exc_caught = 0
        try:
            node.prepare()
        except SCons.Errors.StopError:
            exc_caught = 1
        assert exc_caught, "did not catch expected StopError"

    def test_add_dependency(self):
        """Test adding dependencies to a Node's list.
        """
        node = SCons.Node.Node()
        assert node.depends == []

        zero = SCons.Node.Node()

        one = SCons.Node.Node()
        two = SCons.Node.Node()
        three = SCons.Node.Node()
        four = SCons.Node.Node()
        five = SCons.Node.Node()
        six = SCons.Node.Node()

        node.add_dependency([zero])
        assert node.depends == [zero]
        node.add_dependency([one])
        assert node.depends == [zero, one]
        node.add_dependency([two, three])
        assert node.depends == [zero, one, two, three]
        node.add_dependency([three, four, one])
        assert node.depends == [zero, one, two, three, four]

        try:
            node.add_depends([[five, six]])
        except:
            pass
        else:
            raise Exception("did not catch expected exception")
        assert node.depends == [zero, one, two, three, four]


    def test_add_source(self):
        """Test adding sources to a Node's list.
        """
        node = SCons.Node.Node()
        assert node.sources == []

        zero = SCons.Node.Node()
        one = SCons.Node.Node()
        two = SCons.Node.Node()
        three = SCons.Node.Node()
        four = SCons.Node.Node()
        five = SCons.Node.Node()
        six = SCons.Node.Node()

        node.add_source([zero])
        assert node.sources == [zero]
        node.add_source([one])
        assert node.sources == [zero, one]
        node.add_source([two, three])
        assert node.sources == [zero, one, two, three]
        node.add_source([three, four, one])
        assert node.sources == [zero, one, two, three, four]

        try:
            node.add_source([[five, six]])
        except:
            pass
        else:
            raise Exception("did not catch expected exception")
        assert node.sources == [zero, one, two, three, four], node.sources

    def test_add_ignore(self):
        """Test adding files whose dependencies should be ignored.
        """
        node = SCons.Node.Node()
        assert node.ignore == []

        zero = SCons.Node.Node()
        one = SCons.Node.Node()
        two = SCons.Node.Node()
        three = SCons.Node.Node()
        four = SCons.Node.Node()
        five = SCons.Node.Node()
        six = SCons.Node.Node()

        node.add_ignore([zero])
        assert node.ignore == [zero]
        node.add_ignore([one])
        assert node.ignore == [zero, one]
        node.add_ignore([two, three])
        assert node.ignore == [zero, one, two, three]
        node.add_ignore([three, four, one])
        assert node.ignore == [zero, one, two, three, four]

        try:
            node.add_ignore([[five, six]])
        except:
            pass
        else:
            raise Exception("did not catch expected exception")
        assert node.ignore == [zero, one, two, three, four]

    def test_get_found_includes(self):
        """Test the default get_found_includes() method
        """
        node = SCons.Node.Node()
        target = SCons.Node.Node()
        e = Environment()
        deps = node.get_found_includes(e, None, target)
        assert deps == [], deps

    def test_get_implicit_deps(self):
        """Test get_implicit_deps()
        """
        node = MyNode("nnn")
        target = MyNode("ttt")
        env = Environment()

        # No scanner at all returns []
        deps = node.get_implicit_deps(env, None, target)
        assert deps == [], deps

        s = Scanner()
        d1 = MyNode("d1")
        d2 = MyNode("d2")
        node.Tag('found_includes', [d1, d2])

        # Simple return of the found includes
        deps = node.get_implicit_deps(env, s, target)
        assert deps == [d1, d2], deps

        # By default, our fake scanner recurses
        e = MyNode("eee")
        f = MyNode("fff")
        g = MyNode("ggg")
        d1.Tag('found_includes', [e, f])
        d2.Tag('found_includes', [e, f])
        f.Tag('found_includes', [g])
        deps = node.get_implicit_deps(env, s, target)
        assert deps == [d1, d2, e, f, g], list(map(str, deps))

        # Recursive scanning eliminates duplicates
        e.Tag('found_includes', [f])
        deps = node.get_implicit_deps(env, s, target)
        assert deps == [d1, d2, e, f, g], list(map(str, deps))

        # Scanner method can select specific nodes to recurse
        def no_fff(nodes):
            return [n for n in nodes if str(n)[0] != 'f']
        s.recurse_nodes = no_fff
        deps = node.get_implicit_deps(env, s, target)
        assert deps == [d1, d2, e, f], list(map(str, deps))

        # Scanner method can short-circuit recursing entirely
        s.recurse_nodes = lambda nodes: []
        deps = node.get_implicit_deps(env, s, target)
        assert deps == [d1, d2], list(map(str, deps))

    def test_get_env_scanner(self):
        """Test fetching the environment scanner for a Node
        """
        node = SCons.Node.Node()
        scanner = Scanner()
        env = Environment(SCANNERS = [scanner])
        s = node.get_env_scanner(env)
        assert s == scanner, s
        s = node.get_env_scanner(env, {'X':1})
        assert s == scanner, s

    def test_get_target_scanner(self):
        """Test fetching the target scanner for a Node
        """
        s = Scanner()
        b = Builder()
        b.target_scanner = s
        n = SCons.Node.Node()
        n.builder = b
        x = n.get_target_scanner()
        assert x is s, x

    def test_get_source_scanner(self):
        """Test fetching the source scanner for a Node
        """
        target = SCons.Node.Node()
        source = SCons.Node.Node()
        s = target.get_source_scanner(source)
        assert isinstance(s, SCons.Util.Null), s

        ts1 = Scanner()
        ts2 = Scanner()
        ts3 = Scanner()

        class Builder1(Builder):
            def __call__(self, source):
                r = SCons.Node.Node()
                r.builder = self
                return [r]
        class Builder2(Builder1):
            def __init__(self, scanner):
                self.source_scanner = scanner

        builder = Builder2(ts1)

        targets = builder([source])
        s = targets[0].get_source_scanner(source)
        assert s is ts1, s

        target.builder_set(Builder2(ts1))
        target.builder.source_scanner = ts2
        s = target.get_source_scanner(source)
        assert s is ts2, s

        builder = Builder1(env=Environment(SCANNERS = [ts3]))

        targets = builder([source])

        s = targets[0].get_source_scanner(source)
        assert s is ts3, s


    def test_scan(self):
        """Test Scanner functionality
        """
        env = Environment()
        node = MyNode("nnn")
        node.builder = Builder()
        node.env_set(env)
        x = MyExecutor(env, [node])

        s = Scanner()
        d = MyNode("ddd")
        node.Tag('found_includes', [d])

        node.builder.target_scanner = s
        assert node.implicit is None

        node.scan()
        assert s.called
        assert node.implicit == [d], node.implicit

        # Check that scanning a node with some stored implicit
        # dependencies resets internal attributes appropriately
        # if the stored dependencies need recalculation.
        class StoredNode(MyNode):
            def get_stored_implicit(self):
                return [MyNode('implicit1'), MyNode('implicit2')]

        save_implicit_cache = SCons.Node.implicit_cache
        save_implicit_deps_changed = SCons.Node.implicit_deps_changed
        save_implicit_deps_unchanged = SCons.Node.implicit_deps_unchanged
        SCons.Node.implicit_cache = 1
        SCons.Node.implicit_deps_changed = None
        SCons.Node.implicit_deps_unchanged = None
        try:
            sn = StoredNode("eee")
            sn.builder_set(Builder())
            sn.builder.target_scanner = s

            sn.scan()

            assert sn.implicit == [], sn.implicit
            assert sn.children() == [], sn.children()

        finally:
            SCons.Node.implicit_cache = save_implicit_cache
            SCons.Node.implicit_deps_changed = save_implicit_deps_changed
            SCons.Node.implicit_deps_unchanged = save_implicit_deps_unchanged

    def test_scanner_key(self):
        """Test that a scanner_key() method exists"""
        assert SCons.Node.Node().scanner_key() is None

    def test_children(self):
        """Test fetching the non-ignored "children" of a Node.
        """
        node = SCons.Node.Node()
        n1 = SCons.Node.Node()
        n2 = SCons.Node.Node()
        n3 = SCons.Node.Node()
        n4 = SCons.Node.Node()
        n5 = SCons.Node.Node()
        n6 = SCons.Node.Node()
        n7 = SCons.Node.Node()
        n8 = SCons.Node.Node()
        n9 = SCons.Node.Node()
        n10 = SCons.Node.Node()
        n11 = SCons.Node.Node()
        n12 = SCons.Node.Node()

        node.add_source([n1, n2, n3])
        node.add_dependency([n4, n5, n6])
        node.implicit = []
        node.implicit_set = set()
        node._add_child(node.implicit, node.implicit_set, [n7, n8, n9])
        node._add_child(node.implicit, node.implicit_set, [n10, n11, n12])
        node.add_ignore([n2, n5, n8, n11])

        kids = node.children()
        for kid in [n1, n3, n4, n6, n7, n9, n10, n12]:
            assert kid in kids, kid
        for kid in [n2, n5, n8, n11]:
            assert not kid in kids, kid

    def test_all_children(self):
        """Test fetching all the "children" of a Node.
        """
        node = SCons.Node.Node()
        n1 = SCons.Node.Node()
        n2 = SCons.Node.Node()
        n3 = SCons.Node.Node()
        n4 = SCons.Node.Node()
        n5 = SCons.Node.Node()
        n6 = SCons.Node.Node()
        n7 = SCons.Node.Node()
        n8 = SCons.Node.Node()
        n9 = SCons.Node.Node()
        n10 = SCons.Node.Node()
        n11 = SCons.Node.Node()
        n12 = SCons.Node.Node()

        node.add_source([n1, n2, n3])
        node.add_dependency([n4, n5, n6])
        node.implicit = []
        node.implicit_set = set()
        node._add_child(node.implicit, node.implicit_set, [n7, n8, n9])
        node._add_child(node.implicit, node.implicit_set, [n10, n11, n12])
        node.add_ignore([n2, n5, n8, n11])

        kids = node.all_children()
        for kid in [n1, n2, n3, n4, n5, n6, n7, n8, n9, n10, n11, n12]:
            assert kid in kids, kid

    def test_state(self):
        """Test setting and getting the state of a node
        """
        node = SCons.Node.Node()
        assert node.get_state() == SCons.Node.no_state
        node.set_state(SCons.Node.executing)
        assert node.get_state() == SCons.Node.executing
        assert SCons.Node.pending < SCons.Node.executing
        assert SCons.Node.executing < SCons.Node.up_to_date
        assert SCons.Node.up_to_date < SCons.Node.executed
        assert SCons.Node.executed < SCons.Node.failed

    def test_walker(self):
        """Test walking a Node tree.
        """

        n1 = MyNode("n1")

        nw = SCons.Node.Walker(n1)
        assert not nw.is_done()
        assert nw.get_next().name ==  "n1"
        assert nw.is_done()
        assert nw.get_next() is None

        n2 = MyNode("n2")
        n3 = MyNode("n3")
        n1.add_source([n2, n3])

        nw = SCons.Node.Walker(n1)
        n = nw.get_next()
        assert n.name ==  "n2", n.name
        n = nw.get_next()
        assert n.name ==  "n3", n.name
        n = nw.get_next()
        assert n.name ==  "n1", n.name
        n = nw.get_next()
        assert n is None, n

        n4 = MyNode("n4")
        n5 = MyNode("n5")
        n6 = MyNode("n6")
        n7 = MyNode("n7")
        n2.add_source([n4, n5])
        n3.add_dependency([n6, n7])

        nw = SCons.Node.Walker(n1)
        assert nw.get_next().name ==  "n4"
        assert nw.get_next().name ==  "n5"
        assert n2 in nw.history
        assert nw.get_next().name ==  "n2"
        assert nw.get_next().name ==  "n6"
        assert nw.get_next().name ==  "n7"
        assert n3 in nw.history
        assert nw.get_next().name ==  "n3"
        assert n1 in nw.history
        assert nw.get_next().name ==  "n1"
        assert nw.get_next() is None

        n8 = MyNode("n8")
        n8.add_dependency([n3])
        n7.add_dependency([n8])

        def cycle(node, stack):
            global cycle_detected
            cycle_detected = 1

        global cycle_detected

        nw = SCons.Node.Walker(n3, cycle_func = cycle)
        n = nw.get_next()
        assert n.name == "n6", n.name
        n = nw.get_next()
        assert n.name == "n8", n.name
        assert cycle_detected
        cycle_detected = None
        n = nw.get_next()
        assert n.name == "n7", n.name
        n = nw.get_next()
        assert nw.get_next() is None

    def test_abspath(self):
        """Test the get_abspath() method."""
        n = MyNode("foo")
        assert n.get_abspath() == str(n), n.get_abspath()

    def test_for_signature(self):
        """Test the for_signature() method."""
        n = MyNode("foo")
        assert n.for_signature() == str(n), n.get_abspath()

    def test_get_string(self):
        """Test the get_string() method."""
        class TestNode(MyNode):
            def __init__(self, name, sig):
                MyNode.__init__(self, name)
                self.sig = sig

            def for_signature(self):
                return self.sig

        n = TestNode("foo", "bar")
        assert n.get_string(0) == "foo", n.get_string(0)
        assert n.get_string(1) == "bar", n.get_string(1)

    def test_literal(self):
        """Test the is_literal() function."""
        n=SCons.Node.Node()
        assert n.is_literal()

    def test_Annotate(self):
        """Test using an interface-specific Annotate function."""
        def my_annotate(node, self=self):
            node.Tag('annotation', self.node_string)

        save_Annotate = SCons.Node.Annotate
        SCons.Node.Annotate = my_annotate

        try:
            self.node_string = '#1'
            n = SCons.Node.Node()
            a = n.GetTag('annotation')
            assert a == '#1', a

            self.node_string = '#2'
            n = SCons.Node.Node()
            a = n.GetTag('annotation')
            assert a == '#2', a
        finally:
            SCons.Node.Annotate = save_Annotate

    def test_clear(self):
        """Test clearing all cached state information."""
        n = SCons.Node.Node()

        n.set_state(3)
        n.binfo = 'xyz'
        n.includes = 'testincludes'
        n.Tag('found_includes', {'testkey':'testvalue'})
        n.implicit = 'testimplicit'

        x = MyExecutor()
        n.set_executor(x)

        n.clear()

        assert n.includes is None, n.includes
        assert x.cleaned_up

    def test_get_subst_proxy(self):
        """Test the get_subst_proxy method."""
        n = MyNode("test")

        assert n.get_subst_proxy() == n, n.get_subst_proxy()

    def test_new_binfo(self):
        """Test the new_binfo() method"""
        n = SCons.Node.Node()
        result = n.new_binfo()
        assert isinstance(result, SCons.Node.BuildInfoBase), result

    def test_get_suffix(self):
        """Test the base Node get_suffix() method"""
        n = SCons.Node.Node()
        s = n.get_suffix()
        assert s == '', s

    def test_postprocess(self):
        """Test calling the base Node postprocess() method"""
        n = SCons.Node.Node()
        n.waiting_parents = set( ['foo','bar'] )

        n.postprocess()
        assert n.waiting_parents == set(), n.waiting_parents

    def test_add_to_waiting_parents(self):
        """Test the add_to_waiting_parents() method"""
        n1 = SCons.Node.Node()
        n2 = SCons.Node.Node()
        assert n1.waiting_parents == set(), n1.waiting_parents
        r = n1.add_to_waiting_parents(n2)
        assert r == 1, r
        assert n1.waiting_parents == set((n2,)), n1.waiting_parents
        r = n1.add_to_waiting_parents(n2)
        assert r == 0, r


class NodeListTestCase(unittest.TestCase):
    def test___str__(self):
        """Test"""
        n1 = MyNode("n1")
        n2 = MyNode("n2")
        n3 = MyNode("n3")
        nl = SCons.Node.NodeList([n3, n2, n1])

        l = [1]
        ul = collections.UserList([2])
        s = str(nl)
        assert s == "['n3', 'n2', 'n1']", s

        r = repr(nl)
        r = re.sub('at (0[xX])?[0-9a-fA-F]+', 'at 0x', r)
        # Don't care about ancestry: just leaf value of MyNode
        r = re.sub('<.*?\.MyNode', '<MyNode', r)
        # New-style classes report as "object"; classic classes report
        # as "instance"...
        r = re.sub("object", "instance", r)
        l = ", ".join(["<MyNode instance at 0x>"]*3)
        assert r == '[%s]' % l, r



if __name__ == "__main__":
    suite = unittest.TestSuite()
    tclasses = [ BuildInfoBaseTestCase,
                 NodeInfoBaseTestCase,
                 NodeTestCase,
                 NodeListTestCase ]
    for tclass in tclasses:
        names = unittest.getTestCaseNames(tclass, 'test_')
        suite.addTests(list(map(tclass, names)))
    TestUnit.run(suite)

# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4: