1import unittest
2from test import test_support
3
4import UserDict, random, string
5import gc, weakref
6import sys
7
8
9class DictTest(unittest.TestCase):
10    def test_constructor(self):
11        # calling built-in types without argument must return empty
12        self.assertEqual(dict(), {})
13        self.assertIsNot(dict(), {})
14
15    def test_literal_constructor(self):
16        # check literal constructor for different sized dicts
17        # (to exercise the BUILD_MAP oparg).
18        for n in (0, 1, 6, 256, 400):
19            items = [(''.join(random.sample(string.letters, 8)), i)
20                     for i in range(n)]
21            random.shuffle(items)
22            formatted_items = ('{!r}: {:d}'.format(k, v) for k, v in items)
23            dictliteral = '{' + ', '.join(formatted_items) + '}'
24            self.assertEqual(eval(dictliteral), dict(items))
25
26    def test_bool(self):
27        self.assertIs(not {}, True)
28        self.assertTrue({1: 2})
29        self.assertIs(bool({}), False)
30        self.assertIs(bool({1: 2}), True)
31
32    def test_keys(self):
33        d = {}
34        self.assertEqual(d.keys(), [])
35        d = {'a': 1, 'b': 2}
36        k = d.keys()
37        self.assertEqual(set(k), {'a', 'b'})
38        self.assertIn('a', k)
39        self.assertIn('b', k)
40        self.assertTrue(d.has_key('a'))
41        self.assertTrue(d.has_key('b'))
42        self.assertRaises(TypeError, d.keys, None)
43
44    def test_values(self):
45        d = {}
46        self.assertEqual(d.values(), [])
47        d = {1:2}
48        self.assertEqual(d.values(), [2])
49
50        self.assertRaises(TypeError, d.values, None)
51
52    def test_items(self):
53        d = {}
54        self.assertEqual(d.items(), [])
55
56        d = {1:2}
57        self.assertEqual(d.items(), [(1, 2)])
58
59        self.assertRaises(TypeError, d.items, None)
60
61    def test_has_key(self):
62        d = {}
63        self.assertFalse(d.has_key('a'))
64        d = {'a': 1, 'b': 2}
65        k = d.keys()
66        k.sort()
67        self.assertEqual(k, ['a', 'b'])
68
69        self.assertRaises(TypeError, d.has_key)
70
71    def test_contains(self):
72        d = {}
73        self.assertNotIn('a', d)
74        self.assertFalse('a' in d)
75        self.assertTrue('a' not in d)
76        d = {'a': 1, 'b': 2}
77        self.assertIn('a', d)
78        self.assertIn('b', d)
79        self.assertNotIn('c', d)
80
81        self.assertRaises(TypeError, d.__contains__)
82
83    def test_len(self):
84        d = {}
85        self.assertEqual(len(d), 0)
86        d = {'a': 1, 'b': 2}
87        self.assertEqual(len(d), 2)
88
89    def test_getitem(self):
90        d = {'a': 1, 'b': 2}
91        self.assertEqual(d['a'], 1)
92        self.assertEqual(d['b'], 2)
93        d['c'] = 3
94        d['a'] = 4
95        self.assertEqual(d['c'], 3)
96        self.assertEqual(d['a'], 4)
97        del d['b']
98        self.assertEqual(d, {'a': 4, 'c': 3})
99
100        self.assertRaises(TypeError, d.__getitem__)
101
102        class BadEq(object):
103            def __eq__(self, other):
104                raise Exc()
105            def __hash__(self):
106                return 24
107
108        d = {}
109        d[BadEq()] = 42
110        self.assertRaises(KeyError, d.__getitem__, 23)
111
112        class Exc(Exception): pass
113
114        class BadHash(object):
115            fail = False
116            def __hash__(self):
117                if self.fail:
118                    raise Exc()
119                else:
120                    return 42
121
122        x = BadHash()
123        d[x] = 42
124        x.fail = True
125        self.assertRaises(Exc, d.__getitem__, x)
126
127    def test_clear(self):
128        d = {1:1, 2:2, 3:3}
129        d.clear()
130        self.assertEqual(d, {})
131
132        self.assertRaises(TypeError, d.clear, None)
133
134    def test_update(self):
135        d = {}
136        d.update({1:100})
137        d.update({2:20})
138        d.update({1:1, 2:2, 3:3})
139        self.assertEqual(d, {1:1, 2:2, 3:3})
140
141        d.update()
142        self.assertEqual(d, {1:1, 2:2, 3:3})
143
144        self.assertRaises((TypeError, AttributeError), d.update, None)
145
146        class SimpleUserDict:
147            def __init__(self):
148                self.d = {1:1, 2:2, 3:3}
149            def keys(self):
150                return self.d.keys()
151            def __getitem__(self, i):
152                return self.d[i]
153        d.clear()
154        d.update(SimpleUserDict())
155        self.assertEqual(d, {1:1, 2:2, 3:3})
156
157        class Exc(Exception): pass
158
159        d.clear()
160        class FailingUserDict:
161            def keys(self):
162                raise Exc
163        self.assertRaises(Exc, d.update, FailingUserDict())
164
165        class FailingUserDict:
166            def keys(self):
167                class BogonIter:
168                    def __init__(self):
169                        self.i = 1
170                    def __iter__(self):
171                        return self
172                    def next(self):
173                        if self.i:
174                            self.i = 0
175                            return 'a'
176                        raise Exc
177                return BogonIter()
178            def __getitem__(self, key):
179                return key
180        self.assertRaises(Exc, d.update, FailingUserDict())
181
182        class FailingUserDict:
183            def keys(self):
184                class BogonIter:
185                    def __init__(self):
186                        self.i = ord('a')
187                    def __iter__(self):
188                        return self
189                    def next(self):
190                        if self.i <= ord('z'):
191                            rtn = chr(self.i)
192                            self.i += 1
193                            return rtn
194                        raise StopIteration
195                return BogonIter()
196            def __getitem__(self, key):
197                raise Exc
198        self.assertRaises(Exc, d.update, FailingUserDict())
199
200        class badseq(object):
201            def __iter__(self):
202                return self
203            def next(self):
204                raise Exc()
205
206        self.assertRaises(Exc, {}.update, badseq())
207
208        self.assertRaises(ValueError, {}.update, [(1, 2, 3)])
209
210    def test_fromkeys(self):
211        self.assertEqual(dict.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
212        d = {}
213        self.assertIsNot(d.fromkeys('abc'), d)
214        self.assertEqual(d.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
215        self.assertEqual(d.fromkeys((4,5),0), {4:0, 5:0})
216        self.assertEqual(d.fromkeys([]), {})
217        def g():
218            yield 1
219        self.assertEqual(d.fromkeys(g()), {1:None})
220        self.assertRaises(TypeError, {}.fromkeys, 3)
221        class dictlike(dict): pass
222        self.assertEqual(dictlike.fromkeys('a'), {'a':None})
223        self.assertEqual(dictlike().fromkeys('a'), {'a':None})
224        self.assertIsInstance(dictlike.fromkeys('a'), dictlike)
225        self.assertIsInstance(dictlike().fromkeys('a'), dictlike)
226        class mydict(dict):
227            def __new__(cls):
228                return UserDict.UserDict()
229        ud = mydict.fromkeys('ab')
230        self.assertEqual(ud, {'a':None, 'b':None})
231        self.assertIsInstance(ud, UserDict.UserDict)
232        self.assertRaises(TypeError, dict.fromkeys)
233
234        class Exc(Exception): pass
235
236        class baddict1(dict):
237            def __init__(self):
238                raise Exc()
239
240        self.assertRaises(Exc, baddict1.fromkeys, [1])
241
242        class BadSeq(object):
243            def __iter__(self):
244                return self
245            def next(self):
246                raise Exc()
247
248        self.assertRaises(Exc, dict.fromkeys, BadSeq())
249
250        class baddict2(dict):
251            def __setitem__(self, key, value):
252                raise Exc()
253
254        self.assertRaises(Exc, baddict2.fromkeys, [1])
255
256        # test fast path for dictionary inputs
257        d = dict(zip(range(6), range(6)))
258        self.assertEqual(dict.fromkeys(d, 0), dict(zip(range(6), [0]*6)))
259
260        class baddict3(dict):
261            def __new__(cls):
262                return d
263        d = {i : i for i in range(10)}
264        res = d.copy()
265        res.update(a=None, b=None, c=None)
266        self.assertEqual(baddict3.fromkeys({"a", "b", "c"}), res)
267
268    def test_copy(self):
269        d = {1:1, 2:2, 3:3}
270        self.assertEqual(d.copy(), {1:1, 2:2, 3:3})
271        self.assertEqual({}.copy(), {})
272        self.assertRaises(TypeError, d.copy, None)
273
274    def test_get(self):
275        d = {}
276        self.assertIs(d.get('c'), None)
277        self.assertEqual(d.get('c', 3), 3)
278        d = {'a': 1, 'b': 2}
279        self.assertIs(d.get('c'), None)
280        self.assertEqual(d.get('c', 3), 3)
281        self.assertEqual(d.get('a'), 1)
282        self.assertEqual(d.get('a', 3), 1)
283        self.assertRaises(TypeError, d.get)
284        self.assertRaises(TypeError, d.get, None, None, None)
285
286    def test_setdefault(self):
287        # dict.setdefault()
288        d = {}
289        self.assertIs(d.setdefault('key0'), None)
290        d.setdefault('key0', [])
291        self.assertIs(d.setdefault('key0'), None)
292        d.setdefault('key', []).append(3)
293        self.assertEqual(d['key'][0], 3)
294        d.setdefault('key', []).append(4)
295        self.assertEqual(len(d['key']), 2)
296        self.assertRaises(TypeError, d.setdefault)
297
298        class Exc(Exception): pass
299
300        class BadHash(object):
301            fail = False
302            def __hash__(self):
303                if self.fail:
304                    raise Exc()
305                else:
306                    return 42
307
308        x = BadHash()
309        d[x] = 42
310        x.fail = True
311        self.assertRaises(Exc, d.setdefault, x, [])
312
313    def test_setdefault_atomic(self):
314        # Issue #13521: setdefault() calls __hash__ and __eq__ only once.
315        class Hashed(object):
316            def __init__(self):
317                self.hash_count = 0
318                self.eq_count = 0
319            def __hash__(self):
320                self.hash_count += 1
321                return 42
322            def __eq__(self, other):
323                self.eq_count += 1
324                return id(self) == id(other)
325        hashed1 = Hashed()
326        y = {hashed1: 5}
327        hashed2 = Hashed()
328        y.setdefault(hashed2, [])
329        self.assertEqual(hashed1.hash_count, 1)
330        self.assertEqual(hashed2.hash_count, 1)
331        self.assertEqual(hashed1.eq_count + hashed2.eq_count, 1)
332
333    def test_popitem(self):
334        # dict.popitem()
335        for copymode in -1, +1:
336            # -1: b has same structure as a
337            # +1: b is a.copy()
338            for log2size in range(12):
339                size = 2**log2size
340                a = {}
341                b = {}
342                for i in range(size):
343                    a[repr(i)] = i
344                    if copymode < 0:
345                        b[repr(i)] = i
346                if copymode > 0:
347                    b = a.copy()
348                for i in range(size):
349                    ka, va = ta = a.popitem()
350                    self.assertEqual(va, int(ka))
351                    kb, vb = tb = b.popitem()
352                    self.assertEqual(vb, int(kb))
353                    self.assertFalse(copymode < 0 and ta != tb)
354                self.assertFalse(a)
355                self.assertFalse(b)
356
357        d = {}
358        self.assertRaises(KeyError, d.popitem)
359
360    def test_pop(self):
361        # Tests for pop with specified key
362        d = {}
363        k, v = 'abc', 'def'
364        d[k] = v
365        self.assertRaises(KeyError, d.pop, 'ghi')
366
367        self.assertEqual(d.pop(k), v)
368        self.assertEqual(len(d), 0)
369
370        self.assertRaises(KeyError, d.pop, k)
371
372        # verify longs/ints get same value when key > 32 bits
373        # (for 64-bit archs).  See SF bug #689659.
374        x = 4503599627370496L
375        y = 4503599627370496
376        h = {x: 'anything', y: 'something else'}
377        self.assertEqual(h[x], h[y])
378
379        self.assertEqual(d.pop(k, v), v)
380        d[k] = v
381        self.assertEqual(d.pop(k, 1), v)
382
383        self.assertRaises(TypeError, d.pop)
384
385        class Exc(Exception): pass
386
387        class BadHash(object):
388            fail = False
389            def __hash__(self):
390                if self.fail:
391                    raise Exc()
392                else:
393                    return 42
394
395        x = BadHash()
396        d[x] = 42
397        x.fail = True
398        self.assertRaises(Exc, d.pop, x)
399
400    def test_mutatingiteration(self):
401        # changing dict size during iteration
402        d = {}
403        d[1] = 1
404        with self.assertRaises(RuntimeError):
405            for i in d:
406                d[i+1] = 1
407
408    def test_repr(self):
409        d = {}
410        self.assertEqual(repr(d), '{}')
411        d[1] = 2
412        self.assertEqual(repr(d), '{1: 2}')
413        d = {}
414        d[1] = d
415        self.assertEqual(repr(d), '{1: {...}}')
416
417        class Exc(Exception): pass
418
419        class BadRepr(object):
420            def __repr__(self):
421                raise Exc()
422
423        d = {1: BadRepr()}
424        self.assertRaises(Exc, repr, d)
425
426    def test_repr_deep(self):
427        d = {}
428        for i in range(sys.getrecursionlimit() + 100):
429            d = {1: d}
430        self.assertRaises(RuntimeError, repr, d)
431
432    def test_le(self):
433        self.assertFalse({} < {})
434        self.assertFalse({1: 2} < {1L: 2L})
435
436        class Exc(Exception): pass
437
438        class BadCmp(object):
439            def __eq__(self, other):
440                raise Exc()
441            def __hash__(self):
442                return 42
443
444        d1 = {BadCmp(): 1}
445        d2 = {1: 1}
446
447        with self.assertRaises(Exc):
448            d1 < d2
449
450    def test_missing(self):
451        # Make sure dict doesn't have a __missing__ method
452        self.assertFalse(hasattr(dict, "__missing__"))
453        self.assertFalse(hasattr({}, "__missing__"))
454        # Test several cases:
455        # (D) subclass defines __missing__ method returning a value
456        # (E) subclass defines __missing__ method raising RuntimeError
457        # (F) subclass sets __missing__ instance variable (no effect)
458        # (G) subclass doesn't define __missing__ at all
459        class D(dict):
460            def __missing__(self, key):
461                return 42
462        d = D({1: 2, 3: 4})
463        self.assertEqual(d[1], 2)
464        self.assertEqual(d[3], 4)
465        self.assertNotIn(2, d)
466        self.assertNotIn(2, d.keys())
467        self.assertEqual(d[2], 42)
468
469        class E(dict):
470            def __missing__(self, key):
471                raise RuntimeError(key)
472        e = E()
473        with self.assertRaises(RuntimeError) as c:
474            e[42]
475        self.assertEqual(c.exception.args, (42,))
476
477        class F(dict):
478            def __init__(self):
479                # An instance variable __missing__ should have no effect
480                self.__missing__ = lambda key: None
481        f = F()
482        with self.assertRaises(KeyError) as c:
483            f[42]
484        self.assertEqual(c.exception.args, (42,))
485
486        class G(dict):
487            pass
488        g = G()
489        with self.assertRaises(KeyError) as c:
490            g[42]
491        self.assertEqual(c.exception.args, (42,))
492
493    def test_tuple_keyerror(self):
494        # SF #1576657
495        d = {}
496        with self.assertRaises(KeyError) as c:
497            d[(1,)]
498        self.assertEqual(c.exception.args, ((1,),))
499
500    def test_bad_key(self):
501        # Dictionary lookups should fail if __cmp__() raises an exception.
502        class CustomException(Exception):
503            pass
504
505        class BadDictKey:
506            def __hash__(self):
507                return hash(self.__class__)
508
509            def __cmp__(self, other):
510                if isinstance(other, self.__class__):
511                    raise CustomException
512                return other
513
514        d = {}
515        x1 = BadDictKey()
516        x2 = BadDictKey()
517        d[x1] = 1
518        for stmt in ['d[x2] = 2',
519                     'z = d[x2]',
520                     'x2 in d',
521                     'd.has_key(x2)',
522                     'd.get(x2)',
523                     'd.setdefault(x2, 42)',
524                     'd.pop(x2)',
525                     'd.update({x2: 2})']:
526            with self.assertRaises(CustomException):
527                exec stmt in locals()
528
529    def test_resize1(self):
530        # Dict resizing bug, found by Jack Jansen in 2.2 CVS development.
531        # This version got an assert failure in debug build, infinite loop in
532        # release build.  Unfortunately, provoking this kind of stuff requires
533        # a mix of inserts and deletes hitting exactly the right hash codes in
534        # exactly the right order, and I can't think of a randomized approach
535        # that would be *likely* to hit a failing case in reasonable time.
536
537        d = {}
538        for i in range(5):
539            d[i] = i
540        for i in range(5):
541            del d[i]
542        for i in range(5, 9):  # i==8 was the problem
543            d[i] = i
544
545    def test_resize2(self):
546        # Another dict resizing bug (SF bug #1456209).
547        # This caused Segmentation faults or Illegal instructions.
548
549        class X(object):
550            def __hash__(self):
551                return 5
552            def __eq__(self, other):
553                if resizing:
554                    d.clear()
555                return False
556        d = {}
557        resizing = False
558        d[X()] = 1
559        d[X()] = 2
560        d[X()] = 3
561        d[X()] = 4
562        d[X()] = 5
563        # now trigger a resize
564        resizing = True
565        d[9] = 6
566
567    def test_empty_presized_dict_in_freelist(self):
568        # Bug #3537: if an empty but presized dict with a size larger
569        # than 7 was in the freelist, it triggered an assertion failure
570        with self.assertRaises(ZeroDivisionError):
571            d = {'a': 1 // 0, 'b': None, 'c': None, 'd': None, 'e': None,
572                 'f': None, 'g': None, 'h': None}
573        d = {}
574
575    def test_container_iterator(self):
576        # Bug #3680: tp_traverse was not implemented for dictiter objects
577        class C(object):
578            pass
579        iterators = (dict.iteritems, dict.itervalues, dict.iterkeys)
580        for i in iterators:
581            obj = C()
582            ref = weakref.ref(obj)
583            container = {obj: 1}
584            obj.x = i(container)
585            del obj, container
586            gc.collect()
587            self.assertIs(ref(), None, "Cycle was not collected")
588
589    def _not_tracked(self, t):
590        # Nested containers can take several collections to untrack
591        gc.collect()
592        gc.collect()
593        self.assertFalse(gc.is_tracked(t), t)
594
595    def _tracked(self, t):
596        self.assertTrue(gc.is_tracked(t), t)
597        gc.collect()
598        gc.collect()
599        self.assertTrue(gc.is_tracked(t), t)
600
601    @test_support.cpython_only
602    def test_track_literals(self):
603        # Test GC-optimization of dict literals
604        x, y, z, w = 1.5, "a", (1, None), []
605
606        self._not_tracked({})
607        self._not_tracked({x:(), y:x, z:1})
608        self._not_tracked({1: "a", "b": 2})
609        self._not_tracked({1: 2, (None, True, False, ()): int})
610        self._not_tracked({1: object()})
611
612        # Dicts with mutable elements are always tracked, even if those
613        # elements are not tracked right now.
614        self._tracked({1: []})
615        self._tracked({1: ([],)})
616        self._tracked({1: {}})
617        self._tracked({1: set()})
618
619    @test_support.cpython_only
620    def test_track_dynamic(self):
621        # Test GC-optimization of dynamically-created dicts
622        class MyObject(object):
623            pass
624        x, y, z, w, o = 1.5, "a", (1, object()), [], MyObject()
625
626        d = dict()
627        self._not_tracked(d)
628        d[1] = "a"
629        self._not_tracked(d)
630        d[y] = 2
631        self._not_tracked(d)
632        d[z] = 3
633        self._not_tracked(d)
634        self._not_tracked(d.copy())
635        d[4] = w
636        self._tracked(d)
637        self._tracked(d.copy())
638        d[4] = None
639        self._not_tracked(d)
640        self._not_tracked(d.copy())
641
642        # dd isn't tracked right now, but it may mutate and therefore d
643        # which contains it must be tracked.
644        d = dict()
645        dd = dict()
646        d[1] = dd
647        self._not_tracked(dd)
648        self._tracked(d)
649        dd[1] = d
650        self._tracked(dd)
651
652        d = dict.fromkeys([x, y, z])
653        self._not_tracked(d)
654        dd = dict()
655        dd.update(d)
656        self._not_tracked(dd)
657        d = dict.fromkeys([x, y, z, o])
658        self._tracked(d)
659        dd = dict()
660        dd.update(d)
661        self._tracked(dd)
662
663        d = dict(x=x, y=y, z=z)
664        self._not_tracked(d)
665        d = dict(x=x, y=y, z=z, w=w)
666        self._tracked(d)
667        d = dict()
668        d.update(x=x, y=y, z=z)
669        self._not_tracked(d)
670        d.update(w=w)
671        self._tracked(d)
672
673        d = dict([(x, y), (z, 1)])
674        self._not_tracked(d)
675        d = dict([(x, y), (z, w)])
676        self._tracked(d)
677        d = dict()
678        d.update([(x, y), (z, 1)])
679        self._not_tracked(d)
680        d.update([(x, y), (z, w)])
681        self._tracked(d)
682
683    @test_support.cpython_only
684    def test_track_subtypes(self):
685        # Dict subtypes are always tracked
686        class MyDict(dict):
687            pass
688        self._tracked(MyDict())
689
690
691    def test_free_after_iterating(self):
692        test_support.check_free_after_iterating(self, iter, dict)
693        test_support.check_free_after_iterating(self, lambda d: d.iterkeys(), dict)
694        test_support.check_free_after_iterating(self, lambda d: d.itervalues(), dict)
695        test_support.check_free_after_iterating(self, lambda d: d.iteritems(), dict)
696        test_support.check_free_after_iterating(self, lambda d: iter(d.viewkeys()), dict)
697        test_support.check_free_after_iterating(self, lambda d: iter(d.viewvalues()), dict)
698        test_support.check_free_after_iterating(self, lambda d: iter(d.viewitems()), dict)
699
700    def test_equal_operator_modifying_operand(self):
701        # test fix for seg fault reported in issue 27945 part 3.
702        class X(object):
703            def __del__(self):
704                dict_b.clear()
705
706            def __eq__(self, other):
707                dict_a.clear()
708                return True
709
710            def __hash__(self):
711                return 13
712
713        dict_a = {X(): 0}
714        dict_b = {X(): X()}
715        self.assertTrue(dict_a == dict_b)
716
717    def test_fromkeys_operator_modifying_dict_operand(self):
718        # test fix for seg fault reported in issue 27945 part 4a.
719        class X(int):
720            def __hash__(self):
721                return 13
722
723            def __eq__(self, other):
724                if len(d) > 1:
725                    d.clear()
726                return False
727
728        d = {}  # this is required to exist so that d can be constructed!
729        d = {X(1): 1, X(2): 2}
730        try:
731            dict.fromkeys(d)  # shouldn't crash
732        except RuntimeError:  # implementation defined
733            pass
734
735    def test_fromkeys_operator_modifying_set_operand(self):
736        # test fix for seg fault reported in issue 27945 part 4b.
737        class X(int):
738            def __hash__(self):
739                return 13
740
741            def __eq__(self, other):
742                if len(d) > 1:
743                    d.clear()
744                return False
745
746        d = {}  # this is required to exist so that d can be constructed!
747        d = {X(1), X(2)}
748        try:
749            dict.fromkeys(d)  # shouldn't crash
750        except RuntimeError:  # implementation defined
751            pass
752
753    def test_dictitems_contains_use_after_free(self):
754        class X(object):
755            def __eq__(self, other):
756                d.clear()
757                return NotImplemented
758
759            __hash__ = object.__hash__  # silence Py3k warning
760
761        d = {0: set()}
762        try:
763            (0, X()) in d.iteritems()  # shouldn't crash
764        except RuntimeError:  # implementation defined
765            pass
766
767    def test_init_use_after_free(self):
768        class X(object):
769            def __hash__(self):
770                pair[:] = []
771                return 13
772
773        pair = [X(), 123]
774        dict([pair])
775
776    def test_oob_indexing_dictiter_iternextitem(self):
777        class X(int):
778            def __del__(self):
779                d.clear()
780
781        d = {i: X(i) for i in range(8)}
782
783        def iter_and_mutate():
784            for result in d.iteritems():
785                if result[0] == 2:
786                    d[2] = None # free d[2] --> X(2).__del__ was called
787
788        self.assertRaises(RuntimeError, iter_and_mutate)
789
790
791from test import mapping_tests
792
793class GeneralMappingTests(mapping_tests.BasicTestMappingProtocol):
794    type2test = dict
795
796class Dict(dict):
797    pass
798
799class SubclassMappingTests(mapping_tests.BasicTestMappingProtocol):
800    type2test = Dict
801
802def test_main():
803    with test_support.check_py3k_warnings(
804        ('dict(.has_key..| inequality comparisons) not supported in 3.x',
805         DeprecationWarning)):
806        test_support.run_unittest(
807            DictTest,
808            GeneralMappingTests,
809            SubclassMappingTests,
810        )
811
812if __name__ == "__main__":
813    test_main()
814