Source

pypy-postgresql / lib-python / 2.7 / test / test_dict.py

Full commit
  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
import unittest
from test import test_support

import UserDict, random, string
import gc, weakref


class DictTest(unittest.TestCase):
    def test_constructor(self):
        # calling built-in types without argument must return empty
        self.assertEqual(dict(), {})
        self.assertIsNot(dict(), {})

    def test_literal_constructor(self):
        # check literal constructor for different sized dicts
        # (to exercise the BUILD_MAP oparg).
        for n in (0, 1, 6, 256, 400):
            items = [(''.join(random.sample(string.letters, 8)), i)
                     for i in range(n)]
            random.shuffle(items)
            formatted_items = ('{!r}: {:d}'.format(k, v) for k, v in items)
            dictliteral = '{' + ', '.join(formatted_items) + '}'
            self.assertEqual(eval(dictliteral), dict(items))

    def test_bool(self):
        self.assertIs(not {}, True)
        self.assertTrue({1: 2})
        self.assertIs(bool({}), False)
        self.assertIs(bool({1: 2}), True)

    def test_keys(self):
        d = {}
        self.assertEqual(d.keys(), [])
        d = {'a': 1, 'b': 2}
        k = d.keys()
        self.assertTrue(d.has_key('a'))
        self.assertTrue(d.has_key('b'))

        self.assertRaises(TypeError, d.keys, None)

    def test_values(self):
        d = {}
        self.assertEqual(d.values(), [])
        d = {1:2}
        self.assertEqual(d.values(), [2])

        self.assertRaises(TypeError, d.values, None)

    def test_items(self):
        d = {}
        self.assertEqual(d.items(), [])

        d = {1:2}
        self.assertEqual(d.items(), [(1, 2)])

        self.assertRaises(TypeError, d.items, None)

    def test_has_key(self):
        d = {}
        self.assertFalse(d.has_key('a'))
        d = {'a': 1, 'b': 2}
        k = d.keys()
        k.sort()
        self.assertEqual(k, ['a', 'b'])

        self.assertRaises(TypeError, d.has_key)

    def test_contains(self):
        d = {}
        self.assertNotIn('a', d)
        self.assertFalse('a' in d)
        self.assertTrue('a' not in d)
        d = {'a': 1, 'b': 2}
        self.assertIn('a', d)
        self.assertIn('b', d)
        self.assertNotIn('c', d)

        self.assertRaises(TypeError, d.__contains__)

    def test_len(self):
        d = {}
        self.assertEqual(len(d), 0)
        d = {'a': 1, 'b': 2}
        self.assertEqual(len(d), 2)

    def test_getitem(self):
        d = {'a': 1, 'b': 2}
        self.assertEqual(d['a'], 1)
        self.assertEqual(d['b'], 2)
        d['c'] = 3
        d['a'] = 4
        self.assertEqual(d['c'], 3)
        self.assertEqual(d['a'], 4)
        del d['b']
        self.assertEqual(d, {'a': 4, 'c': 3})

        self.assertRaises(TypeError, d.__getitem__)

        class BadEq(object):
            def __eq__(self, other):
                raise Exc()
            def __hash__(self):
                return 24

        d = {}
        d[BadEq()] = 42
        self.assertRaises(KeyError, d.__getitem__, 23)

        class Exc(Exception): pass

        class BadHash(object):
            fail = False
            def __hash__(self):
                if self.fail:
                    raise Exc()
                else:
                    return 42

        x = BadHash()
        d[x] = 42
        x.fail = True
        self.assertRaises(Exc, d.__getitem__, x)

    def test_clear(self):
        d = {1:1, 2:2, 3:3}
        d.clear()
        self.assertEqual(d, {})

        self.assertRaises(TypeError, d.clear, None)

    def test_update(self):
        d = {}
        d.update({1:100})
        d.update({2:20})
        d.update({1:1, 2:2, 3:3})
        self.assertEqual(d, {1:1, 2:2, 3:3})

        d.update()
        self.assertEqual(d, {1:1, 2:2, 3:3})

        self.assertRaises((TypeError, AttributeError), d.update, None)

        class SimpleUserDict:
            def __init__(self):
                self.d = {1:1, 2:2, 3:3}
            def keys(self):
                return self.d.keys()
            def __getitem__(self, i):
                return self.d[i]
        d.clear()
        d.update(SimpleUserDict())
        self.assertEqual(d, {1:1, 2:2, 3:3})

        class Exc(Exception): pass

        d.clear()
        class FailingUserDict:
            def keys(self):
                raise Exc
        self.assertRaises(Exc, d.update, FailingUserDict())

        class FailingUserDict:
            def keys(self):
                class BogonIter:
                    def __init__(self):
                        self.i = 1
                    def __iter__(self):
                        return self
                    def next(self):
                        if self.i:
                            self.i = 0
                            return 'a'
                        raise Exc
                return BogonIter()
            def __getitem__(self, key):
                return key
        self.assertRaises(Exc, d.update, FailingUserDict())

        class FailingUserDict:
            def keys(self):
                class BogonIter:
                    def __init__(self):
                        self.i = ord('a')
                    def __iter__(self):
                        return self
                    def next(self):
                        if self.i <= ord('z'):
                            rtn = chr(self.i)
                            self.i += 1
                            return rtn
                        raise StopIteration
                return BogonIter()
            def __getitem__(self, key):
                raise Exc
        self.assertRaises(Exc, d.update, FailingUserDict())

        class badseq(object):
            def __iter__(self):
                return self
            def next(self):
                raise Exc()

        self.assertRaises(Exc, {}.update, badseq())

        self.assertRaises(ValueError, {}.update, [(1, 2, 3)])

    def test_fromkeys(self):
        self.assertEqual(dict.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
        d = {}
        self.assertIsNot(d.fromkeys('abc'), d)
        self.assertEqual(d.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
        self.assertEqual(d.fromkeys((4,5),0), {4:0, 5:0})
        self.assertEqual(d.fromkeys([]), {})
        def g():
            yield 1
        self.assertEqual(d.fromkeys(g()), {1:None})
        self.assertRaises(TypeError, {}.fromkeys, 3)
        class dictlike(dict): pass
        self.assertEqual(dictlike.fromkeys('a'), {'a':None})
        self.assertEqual(dictlike().fromkeys('a'), {'a':None})
        self.assertIsInstance(dictlike.fromkeys('a'), dictlike)
        self.assertIsInstance(dictlike().fromkeys('a'), dictlike)
        class mydict(dict):
            def __new__(cls):
                return UserDict.UserDict()
        ud = mydict.fromkeys('ab')
        self.assertEqual(ud, {'a':None, 'b':None})
        self.assertIsInstance(ud, UserDict.UserDict)
        self.assertRaises(TypeError, dict.fromkeys)

        class Exc(Exception): pass

        class baddict1(dict):
            def __init__(self):
                raise Exc()

        self.assertRaises(Exc, baddict1.fromkeys, [1])

        class BadSeq(object):
            def __iter__(self):
                return self
            def next(self):
                raise Exc()

        self.assertRaises(Exc, dict.fromkeys, BadSeq())

        class baddict2(dict):
            def __setitem__(self, key, value):
                raise Exc()

        self.assertRaises(Exc, baddict2.fromkeys, [1])

        # test fast path for dictionary inputs
        d = dict(zip(range(6), range(6)))
        self.assertEqual(dict.fromkeys(d, 0), dict(zip(range(6), [0]*6)))

    def test_copy(self):
        d = {1:1, 2:2, 3:3}
        self.assertEqual(d.copy(), {1:1, 2:2, 3:3})
        self.assertEqual({}.copy(), {})
        self.assertRaises(TypeError, d.copy, None)

    def test_get(self):
        d = {}
        self.assertIs(d.get('c'), None)
        self.assertEqual(d.get('c', 3), 3)
        d = {'a': 1, 'b': 2}
        self.assertIs(d.get('c'), None)
        self.assertEqual(d.get('c', 3), 3)
        self.assertEqual(d.get('a'), 1)
        self.assertEqual(d.get('a', 3), 1)
        self.assertRaises(TypeError, d.get)
        self.assertRaises(TypeError, d.get, None, None, None)

    def test_setdefault(self):
        # dict.setdefault()
        d = {}
        self.assertIs(d.setdefault('key0'), None)
        d.setdefault('key0', [])
        self.assertIs(d.setdefault('key0'), None)
        d.setdefault('key', []).append(3)
        self.assertEqual(d['key'][0], 3)
        d.setdefault('key', []).append(4)
        self.assertEqual(len(d['key']), 2)
        self.assertRaises(TypeError, d.setdefault)

        class Exc(Exception): pass

        class BadHash(object):
            fail = False
            def __hash__(self):
                if self.fail:
                    raise Exc()
                else:
                    return 42

        x = BadHash()
        d[x] = 42
        x.fail = True
        self.assertRaises(Exc, d.setdefault, x, [])

    def test_popitem(self):
        # dict.popitem()
        for copymode in -1, +1:
            # -1: b has same structure as a
            # +1: b is a.copy()
            for log2size in range(12):
                size = 2**log2size
                a = {}
                b = {}
                for i in range(size):
                    a[repr(i)] = i
                    if copymode < 0:
                        b[repr(i)] = i
                if copymode > 0:
                    b = a.copy()
                for i in range(size):
                    ka, va = ta = a.popitem()
                    self.assertEqual(va, int(ka))
                    kb, vb = tb = b.popitem()
                    self.assertEqual(vb, int(kb))
                    if test_support.check_impl_detail():
                        self.assertFalse(copymode < 0 and ta != tb)
                self.assertFalse(a)
                self.assertFalse(b)

        d = {}
        self.assertRaises(KeyError, d.popitem)

    def test_pop(self):
        # Tests for pop with specified key
        d = {}
        k, v = 'abc', 'def'
        d[k] = v
        self.assertRaises(KeyError, d.pop, 'ghi')

        self.assertEqual(d.pop(k), v)
        self.assertEqual(len(d), 0)

        self.assertRaises(KeyError, d.pop, k)

        # verify longs/ints get same value when key > 32 bits
        # (for 64-bit archs).  See SF bug #689659.
        x = 4503599627370496L
        y = 4503599627370496
        h = {x: 'anything', y: 'something else'}
        self.assertEqual(h[x], h[y])

        self.assertEqual(d.pop(k, v), v)
        d[k] = v
        self.assertEqual(d.pop(k, 1), v)

        self.assertRaises(TypeError, d.pop)

        class Exc(Exception): pass

        class BadHash(object):
            fail = False
            def __hash__(self):
                if self.fail:
                    raise Exc()
                else:
                    return 42

        x = BadHash()
        d[x] = 42
        x.fail = True
        self.assertRaises(Exc, d.pop, x)

    def test_mutatingiteration(self):
        # changing dict size during iteration
        d = {}
        d[1] = 1
        with self.assertRaises(RuntimeError):
            for i in d:
                d[i+1] = 1

    def test_repr(self):
        d = {}
        self.assertEqual(repr(d), '{}')
        d[1] = 2
        self.assertEqual(repr(d), '{1: 2}')
        d = {}
        d[1] = d
        self.assertEqual(repr(d), '{1: {...}}')

        class Exc(Exception): pass

        class BadRepr(object):
            def __repr__(self):
                raise Exc()

        d = {1: BadRepr()}
        self.assertRaises(Exc, repr, d)

    def test_le(self):
        self.assertFalse({} < {})
        self.assertFalse({1: 2} < {1L: 2L})

        class Exc(Exception): pass

        class BadCmp(object):
            def __eq__(self, other):
                raise Exc()
            def __hash__(self):
                return 42

        d1 = {BadCmp(): 1}
        d2 = {1: 1}

        with self.assertRaises(Exc):
            d1 < d2

    def test_missing(self):
        # Make sure dict doesn't have a __missing__ method
        self.assertFalse(hasattr(dict, "__missing__"))
        self.assertFalse(hasattr({}, "__missing__"))
        # Test several cases:
        # (D) subclass defines __missing__ method returning a value
        # (E) subclass defines __missing__ method raising RuntimeError
        # (F) subclass sets __missing__ instance variable (no effect)
        # (G) subclass doesn't define __missing__ at a all
        class D(dict):
            def __missing__(self, key):
                return 42
        d = D({1: 2, 3: 4})
        self.assertEqual(d[1], 2)
        self.assertEqual(d[3], 4)
        self.assertNotIn(2, d)
        self.assertNotIn(2, d.keys())
        self.assertEqual(d[2], 42)

        class E(dict):
            def __missing__(self, key):
                raise RuntimeError(key)
        e = E()
        with self.assertRaises(RuntimeError) as c:
            e[42]
        self.assertEqual(c.exception.args, (42,))

        class F(dict):
            def __init__(self):
                # An instance variable __missing__ should have no effect
                self.__missing__ = lambda key: None
        f = F()
        with self.assertRaises(KeyError) as c:
            f[42]
        self.assertEqual(c.exception.args, (42,))

        class G(dict):
            pass
        g = G()
        with self.assertRaises(KeyError) as c:
            g[42]
        self.assertEqual(c.exception.args, (42,))

    def test_tuple_keyerror(self):
        # SF #1576657
        d = {}
        with self.assertRaises(KeyError) as c:
            d[(1,)]
        self.assertEqual(c.exception.args, ((1,),))

    def test_bad_key(self):
        # Dictionary lookups should fail if __cmp__() raises an exception.
        class CustomException(Exception):
            pass

        class BadDictKey:
            def __hash__(self):
                return hash(self.__class__)

            def __cmp__(self, other):
                if isinstance(other, self.__class__):
                    raise CustomException
                return other

        d = {}
        x1 = BadDictKey()
        x2 = BadDictKey()
        d[x1] = 1
        for stmt in ['d[x2] = 2',
                     'z = d[x2]',
                     'x2 in d',
                     'd.has_key(x2)',
                     'd.get(x2)',
                     'd.setdefault(x2, 42)',
                     'd.pop(x2)',
                     'd.update({x2: 2})']:
            with self.assertRaises(CustomException):
                exec stmt in locals()

    def test_resize1(self):
        # Dict resizing bug, found by Jack Jansen in 2.2 CVS development.
        # This version got an assert failure in debug build, infinite loop in
        # release build.  Unfortunately, provoking this kind of stuff requires
        # a mix of inserts and deletes hitting exactly the right hash codes in
        # exactly the right order, and I can't think of a randomized approach
        # that would be *likely* to hit a failing case in reasonable time.

        d = {}
        for i in range(5):
            d[i] = i
        for i in range(5):
            del d[i]
        for i in range(5, 9):  # i==8 was the problem
            d[i] = i

    def test_resize2(self):
        # Another dict resizing bug (SF bug #1456209).
        # This caused Segmentation faults or Illegal instructions.

        class X(object):
            def __hash__(self):
                return 5
            def __eq__(self, other):
                if resizing:
                    d.clear()
                return False
        d = {}
        resizing = False
        d[X()] = 1
        d[X()] = 2
        d[X()] = 3
        d[X()] = 4
        d[X()] = 5
        # now trigger a resize
        resizing = True
        d[9] = 6

    def test_empty_presized_dict_in_freelist(self):
        # Bug #3537: if an empty but presized dict with a size larger
        # than 7 was in the freelist, it triggered an assertion failure
        with self.assertRaises(ZeroDivisionError):
            d = {'a': 1 // 0, 'b': None, 'c': None, 'd': None, 'e': None,
                 'f': None, 'g': None, 'h': None}
        d = {}

    def test_container_iterator(self):
        # Bug #3680: tp_traverse was not implemented for dictiter objects
        class C(object):
            pass
        iterators = (dict.iteritems, dict.itervalues, dict.iterkeys)
        for i in iterators:
            obj = C()
            ref = weakref.ref(obj)
            container = {obj: 1}
            obj.x = i(container)
            del obj, container
            gc.collect()
            self.assertIs(ref(), None, "Cycle was not collected")

    def _not_tracked(self, t):
        # Nested containers can take several collections to untrack
        gc.collect()
        gc.collect()
        self.assertFalse(gc.is_tracked(t), t)

    def _tracked(self, t):
        self.assertTrue(gc.is_tracked(t), t)
        gc.collect()
        gc.collect()
        self.assertTrue(gc.is_tracked(t), t)

    @test_support.cpython_only
    def test_track_literals(self):
        # Test GC-optimization of dict literals
        x, y, z, w = 1.5, "a", (1, None), []

        self._not_tracked({})
        self._not_tracked({x:(), y:x, z:1})
        self._not_tracked({1: "a", "b": 2})
        self._not_tracked({1: 2, (None, True, False, ()): int})
        self._not_tracked({1: object()})

        # Dicts with mutable elements are always tracked, even if those
        # elements are not tracked right now.
        self._tracked({1: []})
        self._tracked({1: ([],)})
        self._tracked({1: {}})
        self._tracked({1: set()})

    @test_support.cpython_only
    def test_track_dynamic(self):
        # Test GC-optimization of dynamically-created dicts
        class MyObject(object):
            pass
        x, y, z, w, o = 1.5, "a", (1, object()), [], MyObject()

        d = dict()
        self._not_tracked(d)
        d[1] = "a"
        self._not_tracked(d)
        d[y] = 2
        self._not_tracked(d)
        d[z] = 3
        self._not_tracked(d)
        self._not_tracked(d.copy())
        d[4] = w
        self._tracked(d)
        self._tracked(d.copy())
        d[4] = None
        self._not_tracked(d)
        self._not_tracked(d.copy())

        # dd isn't tracked right now, but it may mutate and therefore d
        # which contains it must be tracked.
        d = dict()
        dd = dict()
        d[1] = dd
        self._not_tracked(dd)
        self._tracked(d)
        dd[1] = d
        self._tracked(dd)

        d = dict.fromkeys([x, y, z])
        self._not_tracked(d)
        dd = dict()
        dd.update(d)
        self._not_tracked(dd)
        d = dict.fromkeys([x, y, z, o])
        self._tracked(d)
        dd = dict()
        dd.update(d)
        self._tracked(dd)

        d = dict(x=x, y=y, z=z)
        self._not_tracked(d)
        d = dict(x=x, y=y, z=z, w=w)
        self._tracked(d)
        d = dict()
        d.update(x=x, y=y, z=z)
        self._not_tracked(d)
        d.update(w=w)
        self._tracked(d)

        d = dict([(x, y), (z, 1)])
        self._not_tracked(d)
        d = dict([(x, y), (z, w)])
        self._tracked(d)
        d = dict()
        d.update([(x, y), (z, 1)])
        self._not_tracked(d)
        d.update([(x, y), (z, w)])
        self._tracked(d)

    @test_support.cpython_only
    def test_track_subtypes(self):
        # Dict subtypes are always tracked
        class MyDict(dict):
            pass
        self._tracked(MyDict())


from test import mapping_tests

class GeneralMappingTests(mapping_tests.BasicTestMappingProtocol):
    type2test = dict

class Dict(dict):
    pass

class SubclassMappingTests(mapping_tests.BasicTestMappingProtocol):
    type2test = Dict

def test_main():
    with test_support.check_py3k_warnings(
        ('dict(.has_key..| inequality comparisons) not supported in 3.x',
         DeprecationWarning)):
        test_support.run_unittest(
            DictTest,
            GeneralMappingTests,
            SubclassMappingTests,
        )

if __name__ == "__main__":
    test_main()