mirror of https://github.com/python/cpython
781 lines
24 KiB
Python
781 lines
24 KiB
Python
import unittest
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from test import support
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import sys, collections, random, string
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import gc, weakref
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class DictTest(unittest.TestCase):
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def test_constructor(self):
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# calling built-in types without argument must return empty
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self.assertEqual(dict(), {})
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self.assertTrue(dict() is not {})
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def test_literal_constructor(self):
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# check literal constructor for different sized dicts (to exercise the BUILD_MAP oparg
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for n in (0, 1, 6, 256, 400):
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items = [(''.join([random.choice(string.ascii_letters)
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for j in range(8)]),
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i)
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for i in range(n)]
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random.shuffle(items)
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dictliteral = '{' + ', '.join('%r: %d' % item for item in items) + '}'
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self.assertEqual(eval(dictliteral), dict(items))
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def test_bool(self):
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self.assertTrue(not {})
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self.assertTrue({1: 2})
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self.assertTrue(bool({}) is False)
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self.assertTrue(bool({1: 2}) is True)
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def test_keys(self):
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d = {}
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self.assertEqual(set(d.keys()), set())
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d = {'a': 1, 'b': 2}
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k = d.keys()
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self.assertIn('a', d)
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self.assertIn('b', d)
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self.assertRaises(TypeError, d.keys, None)
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self.assertEqual(repr(dict(a=1).keys()), "dict_keys(['a'])")
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def test_values(self):
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d = {}
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self.assertEqual(set(d.values()), set())
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d = {1:2}
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self.assertEqual(set(d.values()), {2})
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self.assertRaises(TypeError, d.values, None)
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self.assertEqual(repr(dict(a=1).values()), "dict_values([1])")
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def test_items(self):
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d = {}
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self.assertEqual(set(d.items()), set())
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d = {1:2}
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self.assertEqual(set(d.items()), {(1, 2)})
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self.assertRaises(TypeError, d.items, None)
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self.assertEqual(repr(dict(a=1).items()), "dict_items([('a', 1)])")
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def test_contains(self):
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d = {}
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self.assertNotIn('a', d)
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self.assertTrue(not ('a' in d))
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self.assertTrue('a' not in d)
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d = {'a': 1, 'b': 2}
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self.assertIn('a', d)
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self.assertIn('b', d)
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self.assertNotIn('c', d)
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self.assertRaises(TypeError, d.__contains__)
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def test_len(self):
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d = {}
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self.assertEqual(len(d), 0)
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d = {'a': 1, 'b': 2}
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self.assertEqual(len(d), 2)
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def test_getitem(self):
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d = {'a': 1, 'b': 2}
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self.assertEqual(d['a'], 1)
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self.assertEqual(d['b'], 2)
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d['c'] = 3
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d['a'] = 4
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self.assertEqual(d['c'], 3)
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self.assertEqual(d['a'], 4)
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del d['b']
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self.assertEqual(d, {'a': 4, 'c': 3})
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self.assertRaises(TypeError, d.__getitem__)
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class BadEq(object):
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def __eq__(self, other):
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raise Exc()
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def __hash__(self):
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return 24
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d = {}
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d[BadEq()] = 42
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self.assertRaises(KeyError, d.__getitem__, 23)
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class Exc(Exception): pass
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class BadHash(object):
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fail = False
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def __hash__(self):
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if self.fail:
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raise Exc()
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else:
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return 42
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x = BadHash()
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d[x] = 42
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x.fail = True
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self.assertRaises(Exc, d.__getitem__, x)
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def test_clear(self):
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d = {1:1, 2:2, 3:3}
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d.clear()
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self.assertEqual(d, {})
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self.assertRaises(TypeError, d.clear, None)
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def test_update(self):
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d = {}
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d.update({1:100})
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d.update({2:20})
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d.update({1:1, 2:2, 3:3})
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self.assertEqual(d, {1:1, 2:2, 3:3})
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d.update()
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self.assertEqual(d, {1:1, 2:2, 3:3})
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self.assertRaises((TypeError, AttributeError), d.update, None)
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class SimpleUserDict:
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def __init__(self):
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self.d = {1:1, 2:2, 3:3}
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def keys(self):
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return self.d.keys()
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def __getitem__(self, i):
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return self.d[i]
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d.clear()
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d.update(SimpleUserDict())
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self.assertEqual(d, {1:1, 2:2, 3:3})
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class Exc(Exception): pass
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d.clear()
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class FailingUserDict:
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def keys(self):
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raise Exc
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self.assertRaises(Exc, d.update, FailingUserDict())
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class FailingUserDict:
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def keys(self):
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class BogonIter:
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def __init__(self):
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self.i = 1
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def __iter__(self):
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return self
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def __next__(self):
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if self.i:
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self.i = 0
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return 'a'
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raise Exc
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return BogonIter()
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def __getitem__(self, key):
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return key
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self.assertRaises(Exc, d.update, FailingUserDict())
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class FailingUserDict:
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def keys(self):
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class BogonIter:
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def __init__(self):
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self.i = ord('a')
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def __iter__(self):
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return self
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def __next__(self):
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if self.i <= ord('z'):
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rtn = chr(self.i)
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self.i += 1
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return rtn
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raise StopIteration
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return BogonIter()
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def __getitem__(self, key):
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raise Exc
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self.assertRaises(Exc, d.update, FailingUserDict())
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class badseq(object):
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def __iter__(self):
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return self
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def __next__(self):
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raise Exc()
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self.assertRaises(Exc, {}.update, badseq())
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self.assertRaises(ValueError, {}.update, [(1, 2, 3)])
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def test_fromkeys(self):
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self.assertEqual(dict.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
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d = {}
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self.assertTrue(not(d.fromkeys('abc') is d))
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self.assertEqual(d.fromkeys('abc'), {'a':None, 'b':None, 'c':None})
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self.assertEqual(d.fromkeys((4,5),0), {4:0, 5:0})
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self.assertEqual(d.fromkeys([]), {})
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def g():
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yield 1
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self.assertEqual(d.fromkeys(g()), {1:None})
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self.assertRaises(TypeError, {}.fromkeys, 3)
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class dictlike(dict): pass
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self.assertEqual(dictlike.fromkeys('a'), {'a':None})
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self.assertEqual(dictlike().fromkeys('a'), {'a':None})
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self.assertTrue(type(dictlike.fromkeys('a')) is dictlike)
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self.assertTrue(type(dictlike().fromkeys('a')) is dictlike)
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class mydict(dict):
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def __new__(cls):
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return collections.UserDict()
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ud = mydict.fromkeys('ab')
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self.assertEqual(ud, {'a':None, 'b':None})
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self.assertTrue(isinstance(ud, collections.UserDict))
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self.assertRaises(TypeError, dict.fromkeys)
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class Exc(Exception): pass
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class baddict1(dict):
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def __init__(self):
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raise Exc()
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self.assertRaises(Exc, baddict1.fromkeys, [1])
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class BadSeq(object):
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def __iter__(self):
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return self
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def __next__(self):
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raise Exc()
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self.assertRaises(Exc, dict.fromkeys, BadSeq())
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class baddict2(dict):
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def __setitem__(self, key, value):
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raise Exc()
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self.assertRaises(Exc, baddict2.fromkeys, [1])
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# test fast path for dictionary inputs
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d = dict(zip(range(6), range(6)))
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self.assertEqual(dict.fromkeys(d, 0), dict(zip(range(6), [0]*6)))
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def test_copy(self):
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d = {1:1, 2:2, 3:3}
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self.assertEqual(d.copy(), {1:1, 2:2, 3:3})
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self.assertEqual({}.copy(), {})
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self.assertRaises(TypeError, d.copy, None)
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def test_get(self):
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d = {}
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self.assertTrue(d.get('c') is None)
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self.assertEqual(d.get('c', 3), 3)
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d = {'a' : 1, 'b' : 2}
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self.assertTrue(d.get('c') is None)
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self.assertEqual(d.get('c', 3), 3)
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self.assertEqual(d.get('a'), 1)
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self.assertEqual(d.get('a', 3), 1)
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self.assertRaises(TypeError, d.get)
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self.assertRaises(TypeError, d.get, None, None, None)
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def test_setdefault(self):
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# dict.setdefault()
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d = {}
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self.assertTrue(d.setdefault('key0') is None)
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d.setdefault('key0', [])
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self.assertTrue(d.setdefault('key0') is None)
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d.setdefault('key', []).append(3)
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self.assertEqual(d['key'][0], 3)
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d.setdefault('key', []).append(4)
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self.assertEqual(len(d['key']), 2)
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self.assertRaises(TypeError, d.setdefault)
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class Exc(Exception): pass
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class BadHash(object):
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fail = False
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def __hash__(self):
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if self.fail:
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raise Exc()
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else:
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return 42
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x = BadHash()
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d[x] = 42
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x.fail = True
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self.assertRaises(Exc, d.setdefault, x, [])
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def test_popitem(self):
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# dict.popitem()
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for copymode in -1, +1:
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# -1: b has same structure as a
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# +1: b is a.copy()
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for log2size in range(12):
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size = 2**log2size
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a = {}
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b = {}
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for i in range(size):
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a[repr(i)] = i
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if copymode < 0:
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b[repr(i)] = i
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if copymode > 0:
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b = a.copy()
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for i in range(size):
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ka, va = ta = a.popitem()
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self.assertEqual(va, int(ka))
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kb, vb = tb = b.popitem()
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self.assertEqual(vb, int(kb))
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self.assertTrue(not(copymode < 0 and ta != tb))
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self.assertTrue(not a)
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self.assertTrue(not b)
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d = {}
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self.assertRaises(KeyError, d.popitem)
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def test_pop(self):
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# Tests for pop with specified key
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d = {}
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k, v = 'abc', 'def'
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d[k] = v
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self.assertRaises(KeyError, d.pop, 'ghi')
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self.assertEqual(d.pop(k), v)
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self.assertEqual(len(d), 0)
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self.assertRaises(KeyError, d.pop, k)
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self.assertEqual(d.pop(k, v), v)
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d[k] = v
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self.assertEqual(d.pop(k, 1), v)
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self.assertRaises(TypeError, d.pop)
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class Exc(Exception): pass
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class BadHash(object):
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fail = False
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def __hash__(self):
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if self.fail:
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raise Exc()
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else:
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return 42
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x = BadHash()
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d[x] = 42
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x.fail = True
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self.assertRaises(Exc, d.pop, x)
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def test_mutatingiteration(self):
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d = {}
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d[1] = 1
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try:
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for i in d:
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d[i+1] = 1
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except RuntimeError:
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pass
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else:
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self.fail("changing dict size during iteration doesn't raise Error")
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def test_repr(self):
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d = {}
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self.assertEqual(repr(d), '{}')
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d[1] = 2
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self.assertEqual(repr(d), '{1: 2}')
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d = {}
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d[1] = d
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self.assertEqual(repr(d), '{1: {...}}')
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class Exc(Exception): pass
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class BadRepr(object):
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def __repr__(self):
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raise Exc()
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d = {1: BadRepr()}
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self.assertRaises(Exc, repr, d)
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def test_eq(self):
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self.assertEqual({}, {})
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self.assertEqual({1: 2}, {1: 2})
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class Exc(Exception): pass
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class BadCmp(object):
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def __eq__(self, other):
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raise Exc()
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def __hash__(self):
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return 1
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d1 = {BadCmp(): 1}
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d2 = {1: 1}
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try:
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d1 == d2
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except Exc:
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pass
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else:
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self.fail("< didn't raise Exc")
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def test_keys_contained(self):
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self.helper_keys_contained(lambda x: x.keys())
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self.helper_keys_contained(lambda x: x.items())
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def helper_keys_contained(self, fn):
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# Test rich comparisons against dict key views, which should behave the
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# same as sets.
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empty = fn(dict())
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empty2 = fn(dict())
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smaller = fn({1:1, 2:2})
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larger = fn({1:1, 2:2, 3:3})
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larger2 = fn({1:1, 2:2, 3:3})
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larger3 = fn({4:1, 2:2, 3:3})
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self.assertTrue(smaller < larger)
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self.assertTrue(smaller <= larger)
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self.assertTrue(larger > smaller)
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self.assertTrue(larger >= smaller)
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self.assertFalse(smaller >= larger)
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self.assertFalse(smaller > larger)
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self.assertFalse(larger <= smaller)
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self.assertFalse(larger < smaller)
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self.assertFalse(smaller < larger3)
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self.assertFalse(smaller <= larger3)
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self.assertFalse(larger3 > smaller)
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self.assertFalse(larger3 >= smaller)
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# Inequality strictness
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self.assertTrue(larger2 >= larger)
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self.assertTrue(larger2 <= larger)
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self.assertFalse(larger2 > larger)
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self.assertFalse(larger2 < larger)
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self.assertTrue(larger == larger2)
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self.assertTrue(smaller != larger)
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# There is an optimization on the zero-element case.
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self.assertTrue(empty == empty2)
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self.assertFalse(empty != empty2)
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self.assertFalse(empty == smaller)
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self.assertTrue(empty != smaller)
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# With the same size, an elementwise compare happens
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self.assertTrue(larger != larger3)
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self.assertFalse(larger == larger3)
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def test_errors_in_view_containment_check(self):
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class C:
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def __eq__(self, other):
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raise RuntimeError
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d1 = {1: C()}
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d2 = {1: C()}
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self.assertRaises(RuntimeError, lambda: d1.items() == d2.items())
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self.assertRaises(RuntimeError, lambda: d1.items() != d2.items())
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self.assertRaises(RuntimeError, lambda: d1.items() <= d2.items())
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self.assertRaises(RuntimeError, lambda: d1.items() >= d2.items())
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d3 = {1: C(), 2: C()}
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self.assertRaises(RuntimeError, lambda: d2.items() < d3.items())
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self.assertRaises(RuntimeError, lambda: d3.items() > d2.items())
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def test_dictview_set_operations_on_keys(self):
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k1 = {1:1, 2:2}.keys()
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k2 = {1:1, 2:2, 3:3}.keys()
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k3 = {4:4}.keys()
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self.assertEquals(k1 - k2, set())
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self.assertEquals(k1 - k3, {1,2})
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self.assertEquals(k2 - k1, {3})
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self.assertEquals(k3 - k1, {4})
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self.assertEquals(k1 & k2, {1,2})
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self.assertEquals(k1 & k3, set())
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self.assertEquals(k1 | k2, {1,2,3})
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self.assertEquals(k1 ^ k2, {3})
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self.assertEquals(k1 ^ k3, {1,2,4})
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def test_dictview_set_operations_on_items(self):
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k1 = {1:1, 2:2}.items()
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k2 = {1:1, 2:2, 3:3}.items()
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k3 = {4:4}.items()
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self.assertEquals(k1 - k2, set())
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self.assertEquals(k1 - k3, {(1,1), (2,2)})
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self.assertEquals(k2 - k1, {(3,3)})
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self.assertEquals(k3 - k1, {(4,4)})
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self.assertEquals(k1 & k2, {(1,1), (2,2)})
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self.assertEquals(k1 & k3, set())
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self.assertEquals(k1 | k2, {(1,1), (2,2), (3,3)})
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self.assertEquals(k1 ^ k2, {(3,3)})
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self.assertEquals(k1 ^ k3, {(1,1), (2,2), (4,4)})
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def test_dictview_mixed_set_operations(self):
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# Just a few for .keys()
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self.assertTrue({1:1}.keys() == {1})
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self.assertTrue({1} == {1:1}.keys())
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self.assertEquals({1:1}.keys() | {2}, {1, 2})
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self.assertEquals({2} | {1:1}.keys(), {1, 2})
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# And a few for .items()
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self.assertTrue({1:1}.items() == {(1,1)})
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self.assertTrue({(1,1)} == {1:1}.items())
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self.assertEquals({1:1}.items() | {2}, {(1,1), 2})
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self.assertEquals({2} | {1:1}.items(), {(1,1), 2})
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def test_missing(self):
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# Make sure dict doesn't have a __missing__ method
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self.assertEqual(hasattr(dict, "__missing__"), False)
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self.assertEqual(hasattr({}, "__missing__"), False)
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# Test several cases:
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# (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()
|
|
try:
|
|
e[42]
|
|
except RuntimeError as err:
|
|
self.assertEqual(err.args, (42,))
|
|
else:
|
|
self.fail("e[42] didn't raise RuntimeError")
|
|
class F(dict):
|
|
def __init__(self):
|
|
# An instance variable __missing__ should have no effect
|
|
self.__missing__ = lambda key: None
|
|
f = F()
|
|
try:
|
|
f[42]
|
|
except KeyError as err:
|
|
self.assertEqual(err.args, (42,))
|
|
else:
|
|
self.fail("f[42] didn't raise KeyError")
|
|
class G(dict):
|
|
pass
|
|
g = G()
|
|
try:
|
|
g[42]
|
|
except KeyError as err:
|
|
self.assertEqual(err.args, (42,))
|
|
else:
|
|
self.fail("g[42] didn't raise KeyError")
|
|
|
|
def test_tuple_keyerror(self):
|
|
# SF #1576657
|
|
d = {}
|
|
try:
|
|
d[(1,)]
|
|
except KeyError as e:
|
|
self.assertEqual(e.args, ((1,),))
|
|
else:
|
|
self.fail("missing KeyError")
|
|
|
|
def test_bad_key(self):
|
|
# Dictionary lookups should fail if __eq__() raises an exception.
|
|
class CustomException(Exception):
|
|
pass
|
|
|
|
class BadDictKey:
|
|
def __hash__(self):
|
|
return hash(self.__class__)
|
|
|
|
def __eq__(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.get(x2)',
|
|
'd.setdefault(x2, 42)',
|
|
'd.pop(x2)',
|
|
'd.update({x2: 2})']:
|
|
try:
|
|
exec(stmt, locals())
|
|
except CustomException:
|
|
pass
|
|
else:
|
|
self.fail("Statement %r didn't raise exception" % stmt)
|
|
|
|
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
|
|
try:
|
|
d = {'a': 1/0, 'b': None, 'c': None, 'd': None, 'e': None,
|
|
'f': None, 'g': None, 'h': None}
|
|
except ZeroDivisionError:
|
|
pass
|
|
d = {}
|
|
|
|
def test_container_iterator(self):
|
|
# Bug #3680: tp_traverse was not implemented for dictiter and
|
|
# dictview objects.
|
|
class C(object):
|
|
pass
|
|
views = (dict.items, dict.values, dict.keys)
|
|
for v in views:
|
|
obj = C()
|
|
ref = weakref.ref(obj)
|
|
container = {obj: 1}
|
|
obj.v = v(container)
|
|
obj.x = iter(obj.v)
|
|
del obj, container
|
|
gc.collect()
|
|
self.assertTrue(ref() is 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)
|
|
|
|
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()})
|
|
|
|
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)
|
|
|
|
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():
|
|
support.run_unittest(
|
|
DictTest,
|
|
GeneralMappingTests,
|
|
SubclassMappingTests,
|
|
)
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|