| 1 | """Unit tests for the copy module."""
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| 2 |
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| 3 | import copy
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| 4 | import copy_reg
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| 5 | import weakref
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| 6 |
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| 7 | import unittest
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| 8 | from test import test_support
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| 9 |
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| 10 | class TestCopy(unittest.TestCase):
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| 11 |
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| 12 | # Attempt full line coverage of copy.py from top to bottom
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| 13 |
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| 14 | def test_exceptions(self):
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| 15 | self.assertTrue(copy.Error is copy.error)
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| 16 | self.assertTrue(issubclass(copy.Error, Exception))
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| 17 |
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| 18 | # The copy() method
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| 19 |
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| 20 | def test_copy_basic(self):
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| 21 | x = 42
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| 22 | y = copy.copy(x)
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| 23 | self.assertEqual(x, y)
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| 24 |
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| 25 | def test_copy_copy(self):
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| 26 | class C(object):
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| 27 | def __init__(self, foo):
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| 28 | self.foo = foo
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| 29 | def __copy__(self):
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| 30 | return C(self.foo)
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| 31 | x = C(42)
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| 32 | y = copy.copy(x)
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| 33 | self.assertEqual(y.__class__, x.__class__)
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| 34 | self.assertEqual(y.foo, x.foo)
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| 35 |
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| 36 | def test_copy_registry(self):
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| 37 | class C(object):
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| 38 | def __new__(cls, foo):
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| 39 | obj = object.__new__(cls)
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| 40 | obj.foo = foo
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| 41 | return obj
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| 42 | def pickle_C(obj):
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| 43 | return (C, (obj.foo,))
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| 44 | x = C(42)
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| 45 | self.assertRaises(TypeError, copy.copy, x)
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| 46 | copy_reg.pickle(C, pickle_C, C)
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| 47 | y = copy.copy(x)
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| 48 |
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| 49 | def test_copy_reduce_ex(self):
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| 50 | class C(object):
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| 51 | def __reduce_ex__(self, proto):
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| 52 | return ""
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| 53 | def __reduce__(self):
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| 54 | raise test_support.TestFailed, "shouldn't call this"
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| 55 | x = C()
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| 56 | y = copy.copy(x)
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| 57 | self.assertTrue(y is x)
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| 58 |
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| 59 | def test_copy_reduce(self):
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| 60 | class C(object):
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| 61 | def __reduce__(self):
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| 62 | return ""
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| 63 | x = C()
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| 64 | y = copy.copy(x)
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| 65 | self.assertTrue(y is x)
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| 66 |
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| 67 | def test_copy_cant(self):
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| 68 | class C(object):
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| 69 | def __getattribute__(self, name):
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| 70 | if name.startswith("__reduce"):
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| 71 | raise AttributeError, name
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| 72 | return object.__getattribute__(self, name)
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| 73 | x = C()
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| 74 | self.assertRaises(copy.Error, copy.copy, x)
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| 75 |
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| 76 | # Type-specific _copy_xxx() methods
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| 77 |
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| 78 | def test_copy_atomic(self):
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| 79 | class Classic:
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| 80 | pass
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| 81 | class NewStyle(object):
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| 82 | pass
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| 83 | def f():
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| 84 | pass
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| 85 | tests = [None, 42, 2L**100, 3.14, True, False, 1j,
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| 86 | "hello", u"hello\u1234", f.func_code,
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| 87 | NewStyle, xrange(10), Classic, max]
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| 88 | for x in tests:
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| 89 | self.assertTrue(copy.copy(x) is x, repr(x))
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| 90 |
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| 91 | def test_copy_list(self):
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| 92 | x = [1, 2, 3]
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| 93 | self.assertEqual(copy.copy(x), x)
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| 94 |
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| 95 | def test_copy_tuple(self):
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| 96 | x = (1, 2, 3)
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| 97 | self.assertEqual(copy.copy(x), x)
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| 98 |
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| 99 | def test_copy_dict(self):
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| 100 | x = {"foo": 1, "bar": 2}
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| 101 | self.assertEqual(copy.copy(x), x)
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| 102 |
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| 103 | def test_copy_inst_vanilla(self):
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| 104 | class C:
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| 105 | def __init__(self, foo):
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| 106 | self.foo = foo
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| 107 | def __cmp__(self, other):
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| 108 | return cmp(self.foo, other.foo)
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| 109 | x = C(42)
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| 110 | self.assertEqual(copy.copy(x), x)
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| 111 |
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| 112 | def test_copy_inst_copy(self):
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| 113 | class C:
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| 114 | def __init__(self, foo):
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| 115 | self.foo = foo
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| 116 | def __copy__(self):
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| 117 | return C(self.foo)
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| 118 | def __cmp__(self, other):
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| 119 | return cmp(self.foo, other.foo)
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| 120 | x = C(42)
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| 121 | self.assertEqual(copy.copy(x), x)
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| 122 |
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| 123 | def test_copy_inst_getinitargs(self):
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| 124 | class C:
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| 125 | def __init__(self, foo):
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| 126 | self.foo = foo
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| 127 | def __getinitargs__(self):
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| 128 | return (self.foo,)
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| 129 | def __cmp__(self, other):
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| 130 | return cmp(self.foo, other.foo)
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| 131 | x = C(42)
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| 132 | self.assertEqual(copy.copy(x), x)
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| 133 |
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| 134 | def test_copy_inst_getstate(self):
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| 135 | class C:
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| 136 | def __init__(self, foo):
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| 137 | self.foo = foo
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| 138 | def __getstate__(self):
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| 139 | return {"foo": self.foo}
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| 140 | def __cmp__(self, other):
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| 141 | return cmp(self.foo, other.foo)
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| 142 | x = C(42)
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| 143 | self.assertEqual(copy.copy(x), x)
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| 144 |
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| 145 | def test_copy_inst_setstate(self):
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| 146 | class C:
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| 147 | def __init__(self, foo):
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| 148 | self.foo = foo
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| 149 | def __setstate__(self, state):
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| 150 | self.foo = state["foo"]
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| 151 | def __cmp__(self, other):
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| 152 | return cmp(self.foo, other.foo)
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| 153 | x = C(42)
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| 154 | self.assertEqual(copy.copy(x), x)
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| 155 |
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| 156 | def test_copy_inst_getstate_setstate(self):
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| 157 | class C:
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| 158 | def __init__(self, foo):
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| 159 | self.foo = foo
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| 160 | def __getstate__(self):
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| 161 | return self.foo
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| 162 | def __setstate__(self, state):
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| 163 | self.foo = state
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| 164 | def __cmp__(self, other):
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| 165 | return cmp(self.foo, other.foo)
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| 166 | x = C(42)
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| 167 | self.assertEqual(copy.copy(x), x)
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| 168 |
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| 169 | # The deepcopy() method
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| 170 |
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| 171 | def test_deepcopy_basic(self):
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| 172 | x = 42
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| 173 | y = copy.deepcopy(x)
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| 174 | self.assertEqual(y, x)
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| 175 |
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| 176 | def test_deepcopy_memo(self):
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| 177 | # Tests of reflexive objects are under type-specific sections below.
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| 178 | # This tests only repetitions of objects.
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| 179 | x = []
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| 180 | x = [x, x]
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| 181 | y = copy.deepcopy(x)
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| 182 | self.assertEqual(y, x)
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| 183 | self.assertTrue(y is not x)
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| 184 | self.assertTrue(y[0] is not x[0])
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| 185 | self.assertTrue(y[0] is y[1])
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| 186 |
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| 187 | def test_deepcopy_issubclass(self):
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| 188 | # XXX Note: there's no way to test the TypeError coming out of
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| 189 | # issubclass() -- this can only happen when an extension
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| 190 | # module defines a "type" that doesn't formally inherit from
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| 191 | # type.
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| 192 | class Meta(type):
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| 193 | pass
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| 194 | class C:
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| 195 | __metaclass__ = Meta
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| 196 | self.assertEqual(copy.deepcopy(C), C)
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| 197 |
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| 198 | def test_deepcopy_deepcopy(self):
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| 199 | class C(object):
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| 200 | def __init__(self, foo):
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| 201 | self.foo = foo
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| 202 | def __deepcopy__(self, memo=None):
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| 203 | return C(self.foo)
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| 204 | x = C(42)
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| 205 | y = copy.deepcopy(x)
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| 206 | self.assertEqual(y.__class__, x.__class__)
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| 207 | self.assertEqual(y.foo, x.foo)
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| 208 |
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| 209 | def test_deepcopy_registry(self):
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| 210 | class C(object):
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| 211 | def __new__(cls, foo):
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| 212 | obj = object.__new__(cls)
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| 213 | obj.foo = foo
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| 214 | return obj
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| 215 | def pickle_C(obj):
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| 216 | return (C, (obj.foo,))
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| 217 | x = C(42)
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| 218 | self.assertRaises(TypeError, copy.deepcopy, x)
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| 219 | copy_reg.pickle(C, pickle_C, C)
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| 220 | y = copy.deepcopy(x)
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| 221 |
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| 222 | def test_deepcopy_reduce_ex(self):
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| 223 | class C(object):
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| 224 | def __reduce_ex__(self, proto):
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| 225 | return ""
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| 226 | def __reduce__(self):
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| 227 | raise test_support.TestFailed, "shouldn't call this"
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| 228 | x = C()
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| 229 | y = copy.deepcopy(x)
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| 230 | self.assertTrue(y is x)
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| 231 |
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| 232 | def test_deepcopy_reduce(self):
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| 233 | class C(object):
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| 234 | def __reduce__(self):
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| 235 | return ""
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| 236 | x = C()
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| 237 | y = copy.deepcopy(x)
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| 238 | self.assertTrue(y is x)
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| 239 |
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| 240 | def test_deepcopy_cant(self):
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| 241 | class C(object):
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| 242 | def __getattribute__(self, name):
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| 243 | if name.startswith("__reduce"):
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| 244 | raise AttributeError, name
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| 245 | return object.__getattribute__(self, name)
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| 246 | x = C()
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| 247 | self.assertRaises(copy.Error, copy.deepcopy, x)
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| 248 |
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| 249 | # Type-specific _deepcopy_xxx() methods
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| 250 |
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| 251 | def test_deepcopy_atomic(self):
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| 252 | class Classic:
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| 253 | pass
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| 254 | class NewStyle(object):
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| 255 | pass
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| 256 | def f():
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| 257 | pass
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| 258 | tests = [None, 42, 2L**100, 3.14, True, False, 1j,
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| 259 | "hello", u"hello\u1234", f.func_code,
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| 260 | NewStyle, xrange(10), Classic, max]
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| 261 | for x in tests:
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| 262 | self.assertTrue(copy.deepcopy(x) is x, repr(x))
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| 263 |
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| 264 | def test_deepcopy_list(self):
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| 265 | x = [[1, 2], 3]
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| 266 | y = copy.deepcopy(x)
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| 267 | self.assertEqual(y, x)
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| 268 | self.assertTrue(x is not y)
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| 269 | self.assertTrue(x[0] is not y[0])
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| 270 |
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| 271 | def test_deepcopy_reflexive_list(self):
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| 272 | x = []
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| 273 | x.append(x)
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| 274 | y = copy.deepcopy(x)
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| 275 | self.assertRaises(RuntimeError, cmp, y, x)
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| 276 | self.assertTrue(y is not x)
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| 277 | self.assertTrue(y[0] is y)
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| 278 | self.assertEqual(len(y), 1)
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| 279 |
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| 280 | def test_deepcopy_tuple(self):
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| 281 | x = ([1, 2], 3)
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| 282 | y = copy.deepcopy(x)
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| 283 | self.assertEqual(y, x)
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| 284 | self.assertTrue(x is not y)
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| 285 | self.assertTrue(x[0] is not y[0])
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| 286 |
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| 287 | def test_deepcopy_reflexive_tuple(self):
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| 288 | x = ([],)
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| 289 | x[0].append(x)
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| 290 | y = copy.deepcopy(x)
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| 291 | self.assertRaises(RuntimeError, cmp, y, x)
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| 292 | self.assertTrue(y is not x)
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| 293 | self.assertTrue(y[0] is not x[0])
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| 294 | self.assertTrue(y[0][0] is y)
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| 295 |
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| 296 | def test_deepcopy_dict(self):
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| 297 | x = {"foo": [1, 2], "bar": 3}
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| 298 | y = copy.deepcopy(x)
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| 299 | self.assertEqual(y, x)
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| 300 | self.assertTrue(x is not y)
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| 301 | self.assertTrue(x["foo"] is not y["foo"])
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| 302 |
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| 303 | def test_deepcopy_reflexive_dict(self):
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| 304 | x = {}
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| 305 | x['foo'] = x
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| 306 | y = copy.deepcopy(x)
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| 307 | self.assertRaises(RuntimeError, cmp, y, x)
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| 308 | self.assertTrue(y is not x)
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| 309 | self.assertTrue(y['foo'] is y)
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| 310 | self.assertEqual(len(y), 1)
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| 311 |
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| 312 | def test_deepcopy_keepalive(self):
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| 313 | memo = {}
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| 314 | x = 42
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| 315 | y = copy.deepcopy(x, memo)
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| 316 | self.assertTrue(memo[id(x)] is x)
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| 317 |
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| 318 | def test_deepcopy_inst_vanilla(self):
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| 319 | class C:
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| 320 | def __init__(self, foo):
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| 321 | self.foo = foo
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| 322 | def __cmp__(self, other):
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| 323 | return cmp(self.foo, other.foo)
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| 324 | x = C([42])
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| 325 | y = copy.deepcopy(x)
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| 326 | self.assertEqual(y, x)
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| 327 | self.assertTrue(y.foo is not x.foo)
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| 328 |
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| 329 | def test_deepcopy_inst_deepcopy(self):
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| 330 | class C:
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| 331 | def __init__(self, foo):
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| 332 | self.foo = foo
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| 333 | def __deepcopy__(self, memo):
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| 334 | return C(copy.deepcopy(self.foo, memo))
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| 335 | def __cmp__(self, other):
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| 336 | return cmp(self.foo, other.foo)
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| 337 | x = C([42])
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| 338 | y = copy.deepcopy(x)
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| 339 | self.assertEqual(y, x)
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| 340 | self.assertTrue(y is not x)
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| 341 | self.assertTrue(y.foo is not x.foo)
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| 342 |
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| 343 | def test_deepcopy_inst_getinitargs(self):
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| 344 | class C:
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| 345 | def __init__(self, foo):
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| 346 | self.foo = foo
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| 347 | def __getinitargs__(self):
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| 348 | return (self.foo,)
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| 349 | def __cmp__(self, other):
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| 350 | return cmp(self.foo, other.foo)
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| 351 | x = C([42])
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| 352 | y = copy.deepcopy(x)
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| 353 | self.assertEqual(y, x)
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| 354 | self.assertTrue(y is not x)
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| 355 | self.assertTrue(y.foo is not x.foo)
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| 356 |
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| 357 | def test_deepcopy_inst_getstate(self):
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| 358 | class C:
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| 359 | def __init__(self, foo):
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| 360 | self.foo = foo
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| 361 | def __getstate__(self):
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| 362 | return {"foo": self.foo}
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| 363 | def __cmp__(self, other):
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| 364 | return cmp(self.foo, other.foo)
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| 365 | x = C([42])
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| 366 | y = copy.deepcopy(x)
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| 367 | self.assertEqual(y, x)
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| 368 | self.assertTrue(y is not x)
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| 369 | self.assertTrue(y.foo is not x.foo)
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| 370 |
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| 371 | def test_deepcopy_inst_setstate(self):
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| 372 | class C:
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| 373 | def __init__(self, foo):
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| 374 | self.foo = foo
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| 375 | def __setstate__(self, state):
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| 376 | self.foo = state["foo"]
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| 377 | def __cmp__(self, other):
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| 378 | return cmp(self.foo, other.foo)
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| 379 | x = C([42])
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| 380 | y = copy.deepcopy(x)
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| 381 | self.assertEqual(y, x)
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| 382 | self.assertTrue(y is not x)
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| 383 | self.assertTrue(y.foo is not x.foo)
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| 384 |
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| 385 | def test_deepcopy_inst_getstate_setstate(self):
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| 386 | class C:
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| 387 | def __init__(self, foo):
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| 388 | self.foo = foo
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| 389 | def __getstate__(self):
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| 390 | return self.foo
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| 391 | def __setstate__(self, state):
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| 392 | self.foo = state
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| 393 | def __cmp__(self, other):
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| 394 | return cmp(self.foo, other.foo)
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| 395 | x = C([42])
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| 396 | y = copy.deepcopy(x)
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| 397 | self.assertEqual(y, x)
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| 398 | self.assertTrue(y is not x)
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| 399 | self.assertTrue(y.foo is not x.foo)
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| 400 |
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| 401 | def test_deepcopy_reflexive_inst(self):
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| 402 | class C:
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| 403 | pass
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| 404 | x = C()
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| 405 | x.foo = x
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| 406 | y = copy.deepcopy(x)
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| 407 | self.assertTrue(y is not x)
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| 408 | self.assertTrue(y.foo is y)
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| 409 |
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| 410 | # _reconstruct()
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| 411 |
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| 412 | def test_reconstruct_string(self):
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| 413 | class C(object):
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| 414 | def __reduce__(self):
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| 415 | return ""
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| 416 | x = C()
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| 417 | y = copy.copy(x)
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| 418 | self.assertTrue(y is x)
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| 419 | y = copy.deepcopy(x)
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| 420 | self.assertTrue(y is x)
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| 421 |
|
|---|
| 422 | def test_reconstruct_nostate(self):
|
|---|
| 423 | class C(object):
|
|---|
| 424 | def __reduce__(self):
|
|---|
| 425 | return (C, ())
|
|---|
| 426 | x = C()
|
|---|
| 427 | x.foo = 42
|
|---|
| 428 | y = copy.copy(x)
|
|---|
| 429 | self.assertTrue(y.__class__ is x.__class__)
|
|---|
| 430 | y = copy.deepcopy(x)
|
|---|
| 431 | self.assertTrue(y.__class__ is x.__class__)
|
|---|
| 432 |
|
|---|
| 433 | def test_reconstruct_state(self):
|
|---|
| 434 | class C(object):
|
|---|
| 435 | def __reduce__(self):
|
|---|
| 436 | return (C, (), self.__dict__)
|
|---|
| 437 | def __cmp__(self, other):
|
|---|
| 438 | return cmp(self.__dict__, other.__dict__)
|
|---|
| 439 | __hash__ = None # Silence Py3k warning
|
|---|
| 440 | x = C()
|
|---|
| 441 | x.foo = [42]
|
|---|
| 442 | y = copy.copy(x)
|
|---|
| 443 | self.assertEqual(y, x)
|
|---|
| 444 | y = copy.deepcopy(x)
|
|---|
| 445 | self.assertEqual(y, x)
|
|---|
| 446 | self.assertTrue(y.foo is not x.foo)
|
|---|
| 447 |
|
|---|
| 448 | def test_reconstruct_state_setstate(self):
|
|---|
| 449 | class C(object):
|
|---|
| 450 | def __reduce__(self):
|
|---|
| 451 | return (C, (), self.__dict__)
|
|---|
| 452 | def __setstate__(self, state):
|
|---|
| 453 | self.__dict__.update(state)
|
|---|
| 454 | def __cmp__(self, other):
|
|---|
| 455 | return cmp(self.__dict__, other.__dict__)
|
|---|
| 456 | __hash__ = None # Silence Py3k warning
|
|---|
| 457 | x = C()
|
|---|
| 458 | x.foo = [42]
|
|---|
| 459 | y = copy.copy(x)
|
|---|
| 460 | self.assertEqual(y, x)
|
|---|
| 461 | y = copy.deepcopy(x)
|
|---|
| 462 | self.assertEqual(y, x)
|
|---|
| 463 | self.assertTrue(y.foo is not x.foo)
|
|---|
| 464 |
|
|---|
| 465 | def test_reconstruct_reflexive(self):
|
|---|
| 466 | class C(object):
|
|---|
| 467 | pass
|
|---|
| 468 | x = C()
|
|---|
| 469 | x.foo = x
|
|---|
| 470 | y = copy.deepcopy(x)
|
|---|
| 471 | self.assertTrue(y is not x)
|
|---|
| 472 | self.assertTrue(y.foo is y)
|
|---|
| 473 |
|
|---|
| 474 | # Additions for Python 2.3 and pickle protocol 2
|
|---|
| 475 |
|
|---|
| 476 | def test_reduce_4tuple(self):
|
|---|
| 477 | class C(list):
|
|---|
| 478 | def __reduce__(self):
|
|---|
| 479 | return (C, (), self.__dict__, iter(self))
|
|---|
| 480 | def __cmp__(self, other):
|
|---|
| 481 | return (cmp(list(self), list(other)) or
|
|---|
| 482 | cmp(self.__dict__, other.__dict__))
|
|---|
| 483 | __hash__ = None # Silence Py3k warning
|
|---|
| 484 | x = C([[1, 2], 3])
|
|---|
| 485 | y = copy.copy(x)
|
|---|
| 486 | self.assertEqual(x, y)
|
|---|
| 487 | self.assertTrue(x is not y)
|
|---|
| 488 | self.assertTrue(x[0] is y[0])
|
|---|
| 489 | y = copy.deepcopy(x)
|
|---|
| 490 | self.assertEqual(x, y)
|
|---|
| 491 | self.assertTrue(x is not y)
|
|---|
| 492 | self.assertTrue(x[0] is not y[0])
|
|---|
| 493 |
|
|---|
| 494 | def test_reduce_5tuple(self):
|
|---|
| 495 | class C(dict):
|
|---|
| 496 | def __reduce__(self):
|
|---|
| 497 | return (C, (), self.__dict__, None, self.iteritems())
|
|---|
| 498 | def __cmp__(self, other):
|
|---|
| 499 | return (cmp(dict(self), list(dict)) or
|
|---|
| 500 | cmp(self.__dict__, other.__dict__))
|
|---|
| 501 | __hash__ = None # Silence Py3k warning
|
|---|
| 502 | x = C([("foo", [1, 2]), ("bar", 3)])
|
|---|
| 503 | y = copy.copy(x)
|
|---|
| 504 | self.assertEqual(x, y)
|
|---|
| 505 | self.assertTrue(x is not y)
|
|---|
| 506 | self.assertTrue(x["foo"] is y["foo"])
|
|---|
| 507 | y = copy.deepcopy(x)
|
|---|
| 508 | self.assertEqual(x, y)
|
|---|
| 509 | self.assertTrue(x is not y)
|
|---|
| 510 | self.assertTrue(x["foo"] is not y["foo"])
|
|---|
| 511 |
|
|---|
| 512 | def test_copy_slots(self):
|
|---|
| 513 | class C(object):
|
|---|
| 514 | __slots__ = ["foo"]
|
|---|
| 515 | x = C()
|
|---|
| 516 | x.foo = [42]
|
|---|
| 517 | y = copy.copy(x)
|
|---|
| 518 | self.assertTrue(x.foo is y.foo)
|
|---|
| 519 |
|
|---|
| 520 | def test_deepcopy_slots(self):
|
|---|
| 521 | class C(object):
|
|---|
| 522 | __slots__ = ["foo"]
|
|---|
| 523 | x = C()
|
|---|
| 524 | x.foo = [42]
|
|---|
| 525 | y = copy.deepcopy(x)
|
|---|
| 526 | self.assertEqual(x.foo, y.foo)
|
|---|
| 527 | self.assertTrue(x.foo is not y.foo)
|
|---|
| 528 |
|
|---|
| 529 | def test_deepcopy_dict_subclass(self):
|
|---|
| 530 | class C(dict):
|
|---|
| 531 | def __init__(self, d=None):
|
|---|
| 532 | if not d:
|
|---|
| 533 | d = {}
|
|---|
| 534 | self._keys = list(d.keys())
|
|---|
| 535 | dict.__init__(self, d)
|
|---|
| 536 | def __setitem__(self, key, item):
|
|---|
| 537 | dict.__setitem__(self, key, item)
|
|---|
| 538 | if key not in self._keys:
|
|---|
| 539 | self._keys.append(key)
|
|---|
| 540 | x = C(d={'foo':0})
|
|---|
| 541 | y = copy.deepcopy(x)
|
|---|
| 542 | self.assertEqual(x, y)
|
|---|
| 543 | self.assertEqual(x._keys, y._keys)
|
|---|
| 544 | self.assertTrue(x is not y)
|
|---|
| 545 | x['bar'] = 1
|
|---|
| 546 | self.assertNotEqual(x, y)
|
|---|
| 547 | self.assertNotEqual(x._keys, y._keys)
|
|---|
| 548 |
|
|---|
| 549 | def test_copy_list_subclass(self):
|
|---|
| 550 | class C(list):
|
|---|
| 551 | pass
|
|---|
| 552 | x = C([[1, 2], 3])
|
|---|
| 553 | x.foo = [4, 5]
|
|---|
| 554 | y = copy.copy(x)
|
|---|
| 555 | self.assertEqual(list(x), list(y))
|
|---|
| 556 | self.assertEqual(x.foo, y.foo)
|
|---|
| 557 | self.assertTrue(x[0] is y[0])
|
|---|
| 558 | self.assertTrue(x.foo is y.foo)
|
|---|
| 559 |
|
|---|
| 560 | def test_deepcopy_list_subclass(self):
|
|---|
| 561 | class C(list):
|
|---|
| 562 | pass
|
|---|
| 563 | x = C([[1, 2], 3])
|
|---|
| 564 | x.foo = [4, 5]
|
|---|
| 565 | y = copy.deepcopy(x)
|
|---|
| 566 | self.assertEqual(list(x), list(y))
|
|---|
| 567 | self.assertEqual(x.foo, y.foo)
|
|---|
| 568 | self.assertTrue(x[0] is not y[0])
|
|---|
| 569 | self.assertTrue(x.foo is not y.foo)
|
|---|
| 570 |
|
|---|
| 571 | def test_copy_tuple_subclass(self):
|
|---|
| 572 | class C(tuple):
|
|---|
| 573 | pass
|
|---|
| 574 | x = C([1, 2, 3])
|
|---|
| 575 | self.assertEqual(tuple(x), (1, 2, 3))
|
|---|
| 576 | y = copy.copy(x)
|
|---|
| 577 | self.assertEqual(tuple(y), (1, 2, 3))
|
|---|
| 578 |
|
|---|
| 579 | def test_deepcopy_tuple_subclass(self):
|
|---|
| 580 | class C(tuple):
|
|---|
| 581 | pass
|
|---|
| 582 | x = C([[1, 2], 3])
|
|---|
| 583 | self.assertEqual(tuple(x), ([1, 2], 3))
|
|---|
| 584 | y = copy.deepcopy(x)
|
|---|
| 585 | self.assertEqual(tuple(y), ([1, 2], 3))
|
|---|
| 586 | self.assertTrue(x is not y)
|
|---|
| 587 | self.assertTrue(x[0] is not y[0])
|
|---|
| 588 |
|
|---|
| 589 | def test_getstate_exc(self):
|
|---|
| 590 | class EvilState(object):
|
|---|
| 591 | def __getstate__(self):
|
|---|
| 592 | raise ValueError, "ain't got no stickin' state"
|
|---|
| 593 | self.assertRaises(ValueError, copy.copy, EvilState())
|
|---|
| 594 |
|
|---|
| 595 | def test_copy_function(self):
|
|---|
| 596 | self.assertEqual(copy.copy(global_foo), global_foo)
|
|---|
| 597 | def foo(x, y): return x+y
|
|---|
| 598 | self.assertEqual(copy.copy(foo), foo)
|
|---|
| 599 | bar = lambda: None
|
|---|
| 600 | self.assertEqual(copy.copy(bar), bar)
|
|---|
| 601 |
|
|---|
| 602 | def test_deepcopy_function(self):
|
|---|
| 603 | self.assertEqual(copy.deepcopy(global_foo), global_foo)
|
|---|
| 604 | def foo(x, y): return x+y
|
|---|
| 605 | self.assertEqual(copy.deepcopy(foo), foo)
|
|---|
| 606 | bar = lambda: None
|
|---|
| 607 | self.assertEqual(copy.deepcopy(bar), bar)
|
|---|
| 608 |
|
|---|
| 609 | def _check_weakref(self, _copy):
|
|---|
| 610 | class C(object):
|
|---|
| 611 | pass
|
|---|
| 612 | obj = C()
|
|---|
| 613 | x = weakref.ref(obj)
|
|---|
| 614 | y = _copy(x)
|
|---|
| 615 | self.assertTrue(y is x)
|
|---|
| 616 | del obj
|
|---|
| 617 | y = _copy(x)
|
|---|
| 618 | self.assertTrue(y is x)
|
|---|
| 619 |
|
|---|
| 620 | def test_copy_weakref(self):
|
|---|
| 621 | self._check_weakref(copy.copy)
|
|---|
| 622 |
|
|---|
| 623 | def test_deepcopy_weakref(self):
|
|---|
| 624 | self._check_weakref(copy.deepcopy)
|
|---|
| 625 |
|
|---|
| 626 | def _check_copy_weakdict(self, _dicttype):
|
|---|
| 627 | class C(object):
|
|---|
| 628 | pass
|
|---|
| 629 | a, b, c, d = [C() for i in xrange(4)]
|
|---|
| 630 | u = _dicttype()
|
|---|
| 631 | u[a] = b
|
|---|
| 632 | u[c] = d
|
|---|
| 633 | v = copy.copy(u)
|
|---|
| 634 | self.assertFalse(v is u)
|
|---|
| 635 | self.assertEqual(v, u)
|
|---|
| 636 | self.assertEqual(v[a], b)
|
|---|
| 637 | self.assertEqual(v[c], d)
|
|---|
| 638 | self.assertEqual(len(v), 2)
|
|---|
| 639 | del c, d
|
|---|
| 640 | self.assertEqual(len(v), 1)
|
|---|
| 641 | x, y = C(), C()
|
|---|
| 642 | # The underlying containers are decoupled
|
|---|
| 643 | v[x] = y
|
|---|
| 644 | self.assertNotIn(x, u)
|
|---|
| 645 |
|
|---|
| 646 | def test_copy_weakkeydict(self):
|
|---|
| 647 | self._check_copy_weakdict(weakref.WeakKeyDictionary)
|
|---|
| 648 |
|
|---|
| 649 | def test_copy_weakvaluedict(self):
|
|---|
| 650 | self._check_copy_weakdict(weakref.WeakValueDictionary)
|
|---|
| 651 |
|
|---|
| 652 | def test_deepcopy_weakkeydict(self):
|
|---|
| 653 | class C(object):
|
|---|
| 654 | def __init__(self, i):
|
|---|
| 655 | self.i = i
|
|---|
| 656 | a, b, c, d = [C(i) for i in xrange(4)]
|
|---|
| 657 | u = weakref.WeakKeyDictionary()
|
|---|
| 658 | u[a] = b
|
|---|
| 659 | u[c] = d
|
|---|
| 660 | # Keys aren't copied, values are
|
|---|
| 661 | v = copy.deepcopy(u)
|
|---|
| 662 | self.assertNotEqual(v, u)
|
|---|
| 663 | self.assertEqual(len(v), 2)
|
|---|
| 664 | self.assertFalse(v[a] is b)
|
|---|
| 665 | self.assertFalse(v[c] is d)
|
|---|
| 666 | self.assertEqual(v[a].i, b.i)
|
|---|
| 667 | self.assertEqual(v[c].i, d.i)
|
|---|
| 668 | del c
|
|---|
| 669 | self.assertEqual(len(v), 1)
|
|---|
| 670 |
|
|---|
| 671 | def test_deepcopy_weakvaluedict(self):
|
|---|
| 672 | class C(object):
|
|---|
| 673 | def __init__(self, i):
|
|---|
| 674 | self.i = i
|
|---|
| 675 | a, b, c, d = [C(i) for i in xrange(4)]
|
|---|
| 676 | u = weakref.WeakValueDictionary()
|
|---|
| 677 | u[a] = b
|
|---|
| 678 | u[c] = d
|
|---|
| 679 | # Keys are copied, values aren't
|
|---|
| 680 | v = copy.deepcopy(u)
|
|---|
| 681 | self.assertNotEqual(v, u)
|
|---|
| 682 | self.assertEqual(len(v), 2)
|
|---|
| 683 | (x, y), (z, t) = sorted(v.items(), key=lambda pair: pair[0].i)
|
|---|
| 684 | self.assertFalse(x is a)
|
|---|
| 685 | self.assertEqual(x.i, a.i)
|
|---|
| 686 | self.assertTrue(y is b)
|
|---|
| 687 | self.assertFalse(z is c)
|
|---|
| 688 | self.assertEqual(z.i, c.i)
|
|---|
| 689 | self.assertTrue(t is d)
|
|---|
| 690 | del x, y, z, t
|
|---|
| 691 | del d
|
|---|
| 692 | self.assertEqual(len(v), 1)
|
|---|
| 693 |
|
|---|
| 694 | def test_deepcopy_bound_method(self):
|
|---|
| 695 | class Foo(object):
|
|---|
| 696 | def m(self):
|
|---|
| 697 | pass
|
|---|
| 698 | f = Foo()
|
|---|
| 699 | f.b = f.m
|
|---|
| 700 | g = copy.deepcopy(f)
|
|---|
| 701 | self.assertEqual(g.m, g.b)
|
|---|
| 702 | self.assertTrue(g.b.im_self is g)
|
|---|
| 703 | g.b()
|
|---|
| 704 |
|
|---|
| 705 |
|
|---|
| 706 | def global_foo(x, y): return x+y
|
|---|
| 707 |
|
|---|
| 708 | def test_main():
|
|---|
| 709 | test_support.run_unittest(TestCopy)
|
|---|
| 710 |
|
|---|
| 711 | if __name__ == "__main__":
|
|---|
| 712 | test_main()
|
|---|
