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, Ellipsis, |
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86 | 42, 2L**100, 3.14, True, False, 1j, |
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87 | "hello", u"hello\u1234", f.func_code, |
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88 | NewStyle, xrange(10), Classic, max] |
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89 | for x in tests: |
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90 | self.assertTrue(copy.copy(x) is x, repr(x)) |
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91 | |
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92 | def test_copy_list(self): |
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93 | x = [1, 2, 3] |
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94 | y = copy.copy(x) |
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95 | self.assertEqual(y, x) |
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96 | self.assertIsNot(y, x) |
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97 | x = [] |
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98 | y = copy.copy(x) |
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99 | self.assertEqual(y, x) |
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100 | self.assertIsNot(y, x) |
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101 | |
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102 | def test_copy_tuple(self): |
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103 | x = (1, 2, 3) |
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104 | self.assertIs(copy.copy(x), x) |
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105 | x = () |
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106 | self.assertIs(copy.copy(x), x) |
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107 | x = (1, 2, 3, []) |
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108 | self.assertIs(copy.copy(x), x) |
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109 | |
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110 | def test_copy_dict(self): |
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111 | x = {"foo": 1, "bar": 2} |
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112 | y = copy.copy(x) |
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113 | self.assertEqual(y, x) |
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114 | self.assertIsNot(y, x) |
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115 | x = {} |
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116 | y = copy.copy(x) |
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117 | self.assertEqual(y, x) |
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118 | self.assertIsNot(y, x) |
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119 | |
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120 | def test_copy_set(self): |
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121 | x = {1, 2, 3} |
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122 | y = copy.copy(x) |
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123 | self.assertEqual(y, x) |
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124 | self.assertIsNot(y, x) |
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125 | x = set() |
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126 | y = copy.copy(x) |
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127 | self.assertEqual(y, x) |
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128 | self.assertIsNot(y, x) |
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129 | |
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130 | def test_copy_frozenset(self): |
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131 | x = frozenset({1, 2, 3}) |
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132 | self.assertIs(copy.copy(x), x) |
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133 | x = frozenset() |
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134 | self.assertIs(copy.copy(x), x) |
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135 | |
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136 | def test_copy_bytearray(self): |
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137 | x = bytearray(b'abc') |
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138 | y = copy.copy(x) |
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139 | self.assertEqual(y, x) |
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140 | self.assertIsNot(y, x) |
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141 | x = bytearray() |
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142 | y = copy.copy(x) |
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143 | self.assertEqual(y, x) |
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144 | self.assertIsNot(y, x) |
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145 | |
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146 | def test_copy_inst_vanilla(self): |
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147 | class C: |
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148 | def __init__(self, foo): |
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149 | self.foo = foo |
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150 | def __cmp__(self, other): |
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151 | return cmp(self.foo, other.foo) |
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152 | x = C(42) |
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153 | self.assertEqual(copy.copy(x), x) |
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154 | |
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155 | def test_copy_inst_copy(self): |
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156 | class C: |
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157 | def __init__(self, foo): |
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158 | self.foo = foo |
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159 | def __copy__(self): |
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160 | return C(self.foo) |
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161 | def __cmp__(self, other): |
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162 | return cmp(self.foo, other.foo) |
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163 | x = C(42) |
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164 | self.assertEqual(copy.copy(x), x) |
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165 | |
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166 | def test_copy_inst_getinitargs(self): |
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167 | class C: |
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168 | def __init__(self, foo): |
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169 | self.foo = foo |
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170 | def __getinitargs__(self): |
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171 | return (self.foo,) |
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172 | def __cmp__(self, other): |
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173 | return cmp(self.foo, other.foo) |
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174 | x = C(42) |
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175 | self.assertEqual(copy.copy(x), x) |
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176 | |
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177 | def test_copy_inst_getstate(self): |
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178 | class C: |
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179 | def __init__(self, foo): |
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180 | self.foo = foo |
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181 | def __getstate__(self): |
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182 | return {"foo": self.foo} |
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183 | def __cmp__(self, other): |
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184 | return cmp(self.foo, other.foo) |
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185 | x = C(42) |
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186 | self.assertEqual(copy.copy(x), x) |
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187 | |
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188 | def test_copy_inst_setstate(self): |
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189 | class C: |
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190 | def __init__(self, foo): |
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191 | self.foo = foo |
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192 | def __setstate__(self, state): |
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193 | self.foo = state["foo"] |
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194 | def __cmp__(self, other): |
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195 | return cmp(self.foo, other.foo) |
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196 | x = C(42) |
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197 | self.assertEqual(copy.copy(x), x) |
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198 | |
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199 | def test_copy_inst_getstate_setstate(self): |
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200 | class C: |
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201 | def __init__(self, foo): |
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202 | self.foo = foo |
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203 | def __getstate__(self): |
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204 | return self.foo |
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205 | def __setstate__(self, state): |
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206 | self.foo = state |
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207 | def __cmp__(self, other): |
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208 | return cmp(self.foo, other.foo) |
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209 | x = C(42) |
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210 | self.assertEqual(copy.copy(x), x) |
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211 | # State with boolean value is false (issue #25718) |
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212 | x = C(0.0) |
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213 | self.assertEqual(copy.copy(x), x) |
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214 | |
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215 | # The deepcopy() method |
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216 | |
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217 | def test_deepcopy_basic(self): |
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218 | x = 42 |
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219 | y = copy.deepcopy(x) |
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220 | self.assertEqual(y, x) |
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221 | |
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222 | def test_deepcopy_memo(self): |
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223 | # Tests of reflexive objects are under type-specific sections below. |
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224 | # This tests only repetitions of objects. |
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225 | x = [] |
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226 | x = [x, x] |
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227 | y = copy.deepcopy(x) |
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228 | self.assertEqual(y, x) |
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229 | self.assertTrue(y is not x) |
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230 | self.assertTrue(y[0] is not x[0]) |
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231 | self.assertTrue(y[0] is y[1]) |
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232 | |
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233 | def test_deepcopy_issubclass(self): |
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234 | # XXX Note: there's no way to test the TypeError coming out of |
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235 | # issubclass() -- this can only happen when an extension |
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236 | # module defines a "type" that doesn't formally inherit from |
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237 | # type. |
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238 | class Meta(type): |
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239 | pass |
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240 | class C: |
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241 | __metaclass__ = Meta |
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242 | self.assertEqual(copy.deepcopy(C), C) |
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243 | |
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244 | def test_deepcopy_deepcopy(self): |
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245 | class C(object): |
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246 | def __init__(self, foo): |
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247 | self.foo = foo |
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248 | def __deepcopy__(self, memo=None): |
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249 | return C(self.foo) |
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250 | x = C(42) |
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251 | y = copy.deepcopy(x) |
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252 | self.assertEqual(y.__class__, x.__class__) |
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253 | self.assertEqual(y.foo, x.foo) |
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254 | |
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255 | def test_deepcopy_registry(self): |
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256 | class C(object): |
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257 | def __new__(cls, foo): |
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258 | obj = object.__new__(cls) |
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259 | obj.foo = foo |
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260 | return obj |
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261 | def pickle_C(obj): |
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262 | return (C, (obj.foo,)) |
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263 | x = C(42) |
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264 | self.assertRaises(TypeError, copy.deepcopy, x) |
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265 | copy_reg.pickle(C, pickle_C, C) |
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266 | y = copy.deepcopy(x) |
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267 | |
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268 | def test_deepcopy_reduce_ex(self): |
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269 | class C(object): |
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270 | def __reduce_ex__(self, proto): |
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271 | return "" |
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272 | def __reduce__(self): |
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273 | raise test_support.TestFailed, "shouldn't call this" |
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274 | x = C() |
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275 | y = copy.deepcopy(x) |
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276 | self.assertTrue(y is x) |
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277 | |
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278 | def test_deepcopy_reduce(self): |
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279 | class C(object): |
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280 | def __reduce__(self): |
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281 | return "" |
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282 | x = C() |
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283 | y = copy.deepcopy(x) |
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284 | self.assertTrue(y is x) |
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285 | |
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286 | def test_deepcopy_cant(self): |
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287 | class C(object): |
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288 | def __getattribute__(self, name): |
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289 | if name.startswith("__reduce"): |
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290 | raise AttributeError, name |
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291 | return object.__getattribute__(self, name) |
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292 | x = C() |
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293 | self.assertRaises(copy.Error, copy.deepcopy, x) |
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294 | |
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295 | # Type-specific _deepcopy_xxx() methods |
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296 | |
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297 | def test_deepcopy_atomic(self): |
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298 | class Classic: |
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299 | pass |
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300 | class NewStyle(object): |
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301 | pass |
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302 | def f(): |
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303 | pass |
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304 | tests = [None, 42, 2L**100, 3.14, True, False, 1j, |
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305 | "hello", u"hello\u1234", f.func_code, |
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306 | NewStyle, xrange(10), Classic, max] |
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307 | for x in tests: |
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308 | self.assertTrue(copy.deepcopy(x) is x, repr(x)) |
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309 | |
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310 | def test_deepcopy_list(self): |
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311 | x = [[1, 2], 3] |
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312 | y = copy.deepcopy(x) |
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313 | self.assertEqual(y, x) |
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314 | self.assertTrue(x is not y) |
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315 | self.assertTrue(x[0] is not y[0]) |
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316 | |
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317 | def test_deepcopy_reflexive_list(self): |
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318 | x = [] |
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319 | x.append(x) |
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320 | y = copy.deepcopy(x) |
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321 | self.assertRaises(RuntimeError, cmp, y, x) |
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322 | self.assertTrue(y is not x) |
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323 | self.assertTrue(y[0] is y) |
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324 | self.assertEqual(len(y), 1) |
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325 | |
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326 | def test_deepcopy_tuple(self): |
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327 | x = ([1, 2], 3) |
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328 | y = copy.deepcopy(x) |
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329 | self.assertEqual(y, x) |
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330 | self.assertTrue(x is not y) |
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331 | self.assertTrue(x[0] is not y[0]) |
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332 | |
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333 | def test_deepcopy_reflexive_tuple(self): |
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334 | x = ([],) |
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335 | x[0].append(x) |
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336 | y = copy.deepcopy(x) |
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337 | self.assertRaises(RuntimeError, cmp, y, x) |
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338 | self.assertTrue(y is not x) |
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339 | self.assertTrue(y[0] is not x[0]) |
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340 | self.assertTrue(y[0][0] is y) |
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341 | |
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342 | def test_deepcopy_dict(self): |
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343 | x = {"foo": [1, 2], "bar": 3} |
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344 | y = copy.deepcopy(x) |
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345 | self.assertEqual(y, x) |
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346 | self.assertTrue(x is not y) |
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347 | self.assertTrue(x["foo"] is not y["foo"]) |
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348 | |
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349 | def test_deepcopy_reflexive_dict(self): |
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350 | x = {} |
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351 | x['foo'] = x |
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352 | y = copy.deepcopy(x) |
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353 | self.assertRaises(RuntimeError, cmp, y, x) |
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354 | self.assertTrue(y is not x) |
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355 | self.assertTrue(y['foo'] is y) |
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356 | self.assertEqual(len(y), 1) |
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357 | |
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358 | def test_deepcopy_keepalive(self): |
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359 | memo = {} |
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360 | x = 42 |
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361 | y = copy.deepcopy(x, memo) |
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362 | self.assertTrue(memo[id(x)] is x) |
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363 | |
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364 | def test_deepcopy_inst_vanilla(self): |
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365 | class C: |
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366 | def __init__(self, foo): |
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367 | self.foo = foo |
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368 | def __cmp__(self, other): |
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369 | return cmp(self.foo, other.foo) |
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370 | x = C([42]) |
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371 | y = copy.deepcopy(x) |
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372 | self.assertEqual(y, x) |
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373 | self.assertTrue(y.foo is not x.foo) |
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374 | |
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375 | def test_deepcopy_inst_deepcopy(self): |
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376 | class C: |
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377 | def __init__(self, foo): |
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378 | self.foo = foo |
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379 | def __deepcopy__(self, memo): |
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380 | return C(copy.deepcopy(self.foo, memo)) |
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381 | def __cmp__(self, other): |
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382 | return cmp(self.foo, other.foo) |
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383 | x = C([42]) |
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384 | y = copy.deepcopy(x) |
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385 | self.assertEqual(y, x) |
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386 | self.assertTrue(y is not x) |
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387 | self.assertTrue(y.foo is not x.foo) |
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388 | |
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389 | def test_deepcopy_inst_getinitargs(self): |
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390 | class C: |
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391 | def __init__(self, foo): |
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392 | self.foo = foo |
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393 | def __getinitargs__(self): |
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394 | return (self.foo,) |
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395 | def __cmp__(self, other): |
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396 | return cmp(self.foo, other.foo) |
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397 | x = C([42]) |
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398 | y = copy.deepcopy(x) |
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399 | self.assertEqual(y, x) |
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400 | self.assertTrue(y is not x) |
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401 | self.assertTrue(y.foo is not x.foo) |
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402 | |
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403 | def test_deepcopy_inst_getstate(self): |
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404 | class C: |
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405 | def __init__(self, foo): |
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406 | self.foo = foo |
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407 | def __getstate__(self): |
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408 | return {"foo": self.foo} |
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409 | def __cmp__(self, other): |
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410 | return cmp(self.foo, other.foo) |
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411 | x = C([42]) |
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412 | y = copy.deepcopy(x) |
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413 | self.assertEqual(y, x) |
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414 | self.assertTrue(y is not x) |
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415 | self.assertTrue(y.foo is not x.foo) |
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416 | |
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417 | def test_deepcopy_inst_setstate(self): |
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418 | class C: |
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419 | def __init__(self, foo): |
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420 | self.foo = foo |
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421 | def __setstate__(self, state): |
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422 | self.foo = state["foo"] |
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423 | def __cmp__(self, other): |
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424 | return cmp(self.foo, other.foo) |
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425 | x = C([42]) |
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426 | y = copy.deepcopy(x) |
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427 | self.assertEqual(y, x) |
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428 | self.assertTrue(y is not x) |
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429 | self.assertTrue(y.foo is not x.foo) |
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430 | |
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431 | def test_deepcopy_inst_getstate_setstate(self): |
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432 | class C: |
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433 | def __init__(self, foo): |
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434 | self.foo = foo |
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435 | def __getstate__(self): |
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436 | return self.foo |
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437 | def __setstate__(self, state): |
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438 | self.foo = state |
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439 | def __cmp__(self, other): |
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440 | return cmp(self.foo, other.foo) |
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441 | x = C([42]) |
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442 | y = copy.deepcopy(x) |
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443 | self.assertEqual(y, x) |
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444 | self.assertIsNot(y, x) |
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445 | self.assertIsNot(y.foo, x.foo) |
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446 | # State with boolean value is false (issue #25718) |
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447 | x = C([]) |
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448 | y = copy.deepcopy(x) |
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449 | self.assertEqual(y, x) |
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450 | self.assertTrue(y is not x) |
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451 | self.assertTrue(y.foo is not x.foo) |
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452 | |
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453 | def test_deepcopy_reflexive_inst(self): |
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454 | class C: |
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455 | pass |
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456 | x = C() |
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457 | x.foo = x |
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458 | y = copy.deepcopy(x) |
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459 | self.assertTrue(y is not x) |
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460 | self.assertTrue(y.foo is y) |
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461 | |
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462 | # _reconstruct() |
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463 | |
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464 | def test_reconstruct_string(self): |
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465 | class C(object): |
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466 | def __reduce__(self): |
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467 | return "" |
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468 | x = C() |
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469 | y = copy.copy(x) |
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470 | self.assertTrue(y is x) |
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471 | y = copy.deepcopy(x) |
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472 | self.assertTrue(y is x) |
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473 | |
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474 | def test_reconstruct_nostate(self): |
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475 | class C(object): |
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476 | def __reduce__(self): |
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477 | return (C, ()) |
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478 | x = C() |
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479 | x.foo = 42 |
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480 | y = copy.copy(x) |
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481 | self.assertTrue(y.__class__ is x.__class__) |
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482 | y = copy.deepcopy(x) |
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483 | self.assertTrue(y.__class__ is x.__class__) |
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484 | |
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485 | def test_reconstruct_state(self): |
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486 | class C(object): |
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487 | def __reduce__(self): |
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488 | return (C, (), self.__dict__) |
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489 | def __cmp__(self, other): |
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490 | return cmp(self.__dict__, other.__dict__) |
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491 | __hash__ = None # Silence Py3k warning |
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492 | x = C() |
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493 | x.foo = [42] |
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494 | y = copy.copy(x) |
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495 | self.assertEqual(y, x) |
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496 | y = copy.deepcopy(x) |
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497 | self.assertEqual(y, x) |
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498 | self.assertTrue(y.foo is not x.foo) |
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499 | |
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500 | def test_reconstruct_state_setstate(self): |
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501 | class C(object): |
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502 | def __reduce__(self): |
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503 | return (C, (), self.__dict__) |
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504 | def __setstate__(self, state): |
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505 | self.__dict__.update(state) |
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506 | def __cmp__(self, other): |
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507 | return cmp(self.__dict__, other.__dict__) |
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508 | __hash__ = None # Silence Py3k warning |
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509 | x = C() |
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510 | x.foo = [42] |
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511 | y = copy.copy(x) |
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512 | self.assertEqual(y, x) |
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513 | y = copy.deepcopy(x) |
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514 | self.assertEqual(y, x) |
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515 | self.assertTrue(y.foo is not x.foo) |
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516 | |
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517 | def test_reconstruct_reflexive(self): |
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518 | class C(object): |
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519 | pass |
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520 | x = C() |
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521 | x.foo = x |
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522 | y = copy.deepcopy(x) |
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523 | self.assertTrue(y is not x) |
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524 | self.assertTrue(y.foo is y) |
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525 | |
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526 | # Additions for Python 2.3 and pickle protocol 2 |
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527 | |
---|
528 | def test_reduce_4tuple(self): |
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529 | class C(list): |
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530 | def __reduce__(self): |
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531 | return (C, (), self.__dict__, iter(self)) |
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532 | def __cmp__(self, other): |
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533 | return (cmp(list(self), list(other)) or |
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534 | cmp(self.__dict__, other.__dict__)) |
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535 | __hash__ = None # Silence Py3k warning |
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536 | x = C([[1, 2], 3]) |
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537 | y = copy.copy(x) |
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538 | self.assertEqual(x, y) |
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539 | self.assertTrue(x is not y) |
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540 | self.assertTrue(x[0] is y[0]) |
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541 | y = copy.deepcopy(x) |
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542 | self.assertEqual(x, y) |
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543 | self.assertTrue(x is not y) |
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544 | self.assertTrue(x[0] is not y[0]) |
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545 | |
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546 | def test_reduce_5tuple(self): |
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547 | class C(dict): |
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548 | def __reduce__(self): |
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549 | return (C, (), self.__dict__, None, self.iteritems()) |
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550 | def __cmp__(self, other): |
---|
551 | return (cmp(dict(self), list(dict)) or |
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552 | cmp(self.__dict__, other.__dict__)) |
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553 | __hash__ = None # Silence Py3k warning |
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554 | x = C([("foo", [1, 2]), ("bar", 3)]) |
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555 | y = copy.copy(x) |
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556 | self.assertEqual(x, y) |
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557 | self.assertTrue(x is not y) |
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558 | self.assertTrue(x["foo"] is y["foo"]) |
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559 | y = copy.deepcopy(x) |
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560 | self.assertEqual(x, y) |
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561 | self.assertTrue(x is not y) |
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562 | self.assertTrue(x["foo"] is not y["foo"]) |
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563 | |
---|
564 | def test_copy_slots(self): |
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565 | class C(object): |
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566 | __slots__ = ["foo"] |
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567 | x = C() |
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568 | x.foo = [42] |
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569 | y = copy.copy(x) |
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570 | self.assertTrue(x.foo is y.foo) |
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571 | |
---|
572 | def test_deepcopy_slots(self): |
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573 | class C(object): |
---|
574 | __slots__ = ["foo"] |
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575 | x = C() |
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576 | x.foo = [42] |
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577 | y = copy.deepcopy(x) |
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578 | self.assertEqual(x.foo, y.foo) |
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579 | self.assertTrue(x.foo is not y.foo) |
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580 | |
---|
581 | def test_deepcopy_dict_subclass(self): |
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582 | class C(dict): |
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583 | def __init__(self, d=None): |
---|
584 | if not d: |
---|
585 | d = {} |
---|
586 | self._keys = list(d.keys()) |
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587 | dict.__init__(self, d) |
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588 | def __setitem__(self, key, item): |
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589 | dict.__setitem__(self, key, item) |
---|
590 | if key not in self._keys: |
---|
591 | self._keys.append(key) |
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592 | x = C(d={'foo':0}) |
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593 | y = copy.deepcopy(x) |
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594 | self.assertEqual(x, y) |
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595 | self.assertEqual(x._keys, y._keys) |
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596 | self.assertTrue(x is not y) |
---|
597 | x['bar'] = 1 |
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598 | self.assertNotEqual(x, y) |
---|
599 | self.assertNotEqual(x._keys, y._keys) |
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600 | |
---|
601 | def test_copy_list_subclass(self): |
---|
602 | class C(list): |
---|
603 | pass |
---|
604 | x = C([[1, 2], 3]) |
---|
605 | x.foo = [4, 5] |
---|
606 | y = copy.copy(x) |
---|
607 | self.assertEqual(list(x), list(y)) |
---|
608 | self.assertEqual(x.foo, y.foo) |
---|
609 | self.assertTrue(x[0] is y[0]) |
---|
610 | self.assertTrue(x.foo is y.foo) |
---|
611 | |
---|
612 | def test_deepcopy_list_subclass(self): |
---|
613 | class C(list): |
---|
614 | pass |
---|
615 | x = C([[1, 2], 3]) |
---|
616 | x.foo = [4, 5] |
---|
617 | y = copy.deepcopy(x) |
---|
618 | self.assertEqual(list(x), list(y)) |
---|
619 | self.assertEqual(x.foo, y.foo) |
---|
620 | self.assertTrue(x[0] is not y[0]) |
---|
621 | self.assertTrue(x.foo is not y.foo) |
---|
622 | |
---|
623 | def test_copy_tuple_subclass(self): |
---|
624 | class C(tuple): |
---|
625 | pass |
---|
626 | x = C([1, 2, 3]) |
---|
627 | self.assertEqual(tuple(x), (1, 2, 3)) |
---|
628 | y = copy.copy(x) |
---|
629 | self.assertEqual(tuple(y), (1, 2, 3)) |
---|
630 | |
---|
631 | def test_deepcopy_tuple_subclass(self): |
---|
632 | class C(tuple): |
---|
633 | pass |
---|
634 | x = C([[1, 2], 3]) |
---|
635 | self.assertEqual(tuple(x), ([1, 2], 3)) |
---|
636 | y = copy.deepcopy(x) |
---|
637 | self.assertEqual(tuple(y), ([1, 2], 3)) |
---|
638 | self.assertTrue(x is not y) |
---|
639 | self.assertTrue(x[0] is not y[0]) |
---|
640 | |
---|
641 | def test_getstate_exc(self): |
---|
642 | class EvilState(object): |
---|
643 | def __getstate__(self): |
---|
644 | raise ValueError, "ain't got no stickin' state" |
---|
645 | self.assertRaises(ValueError, copy.copy, EvilState()) |
---|
646 | |
---|
647 | def test_copy_function(self): |
---|
648 | self.assertEqual(copy.copy(global_foo), global_foo) |
---|
649 | def foo(x, y): return x+y |
---|
650 | self.assertEqual(copy.copy(foo), foo) |
---|
651 | bar = lambda: None |
---|
652 | self.assertEqual(copy.copy(bar), bar) |
---|
653 | |
---|
654 | def test_deepcopy_function(self): |
---|
655 | self.assertEqual(copy.deepcopy(global_foo), global_foo) |
---|
656 | def foo(x, y): return x+y |
---|
657 | self.assertEqual(copy.deepcopy(foo), foo) |
---|
658 | bar = lambda: None |
---|
659 | self.assertEqual(copy.deepcopy(bar), bar) |
---|
660 | |
---|
661 | def _check_weakref(self, _copy): |
---|
662 | class C(object): |
---|
663 | pass |
---|
664 | obj = C() |
---|
665 | x = weakref.ref(obj) |
---|
666 | y = _copy(x) |
---|
667 | self.assertTrue(y is x) |
---|
668 | del obj |
---|
669 | y = _copy(x) |
---|
670 | self.assertTrue(y is x) |
---|
671 | |
---|
672 | def test_copy_weakref(self): |
---|
673 | self._check_weakref(copy.copy) |
---|
674 | |
---|
675 | def test_deepcopy_weakref(self): |
---|
676 | self._check_weakref(copy.deepcopy) |
---|
677 | |
---|
678 | def _check_copy_weakdict(self, _dicttype): |
---|
679 | class C(object): |
---|
680 | pass |
---|
681 | a, b, c, d = [C() for i in xrange(4)] |
---|
682 | u = _dicttype() |
---|
683 | u[a] = b |
---|
684 | u[c] = d |
---|
685 | v = copy.copy(u) |
---|
686 | self.assertFalse(v is u) |
---|
687 | self.assertEqual(v, u) |
---|
688 | self.assertEqual(v[a], b) |
---|
689 | self.assertEqual(v[c], d) |
---|
690 | self.assertEqual(len(v), 2) |
---|
691 | del c, d |
---|
692 | self.assertEqual(len(v), 1) |
---|
693 | x, y = C(), C() |
---|
694 | # The underlying containers are decoupled |
---|
695 | v[x] = y |
---|
696 | self.assertNotIn(x, u) |
---|
697 | |
---|
698 | def test_copy_weakkeydict(self): |
---|
699 | self._check_copy_weakdict(weakref.WeakKeyDictionary) |
---|
700 | |
---|
701 | def test_copy_weakvaluedict(self): |
---|
702 | self._check_copy_weakdict(weakref.WeakValueDictionary) |
---|
703 | |
---|
704 | def test_deepcopy_weakkeydict(self): |
---|
705 | class C(object): |
---|
706 | def __init__(self, i): |
---|
707 | self.i = i |
---|
708 | a, b, c, d = [C(i) for i in xrange(4)] |
---|
709 | u = weakref.WeakKeyDictionary() |
---|
710 | u[a] = b |
---|
711 | u[c] = d |
---|
712 | # Keys aren't copied, values are |
---|
713 | v = copy.deepcopy(u) |
---|
714 | self.assertNotEqual(v, u) |
---|
715 | self.assertEqual(len(v), 2) |
---|
716 | self.assertFalse(v[a] is b) |
---|
717 | self.assertFalse(v[c] is d) |
---|
718 | self.assertEqual(v[a].i, b.i) |
---|
719 | self.assertEqual(v[c].i, d.i) |
---|
720 | del c |
---|
721 | self.assertEqual(len(v), 1) |
---|
722 | |
---|
723 | def test_deepcopy_weakvaluedict(self): |
---|
724 | class C(object): |
---|
725 | def __init__(self, i): |
---|
726 | self.i = i |
---|
727 | a, b, c, d = [C(i) for i in xrange(4)] |
---|
728 | u = weakref.WeakValueDictionary() |
---|
729 | u[a] = b |
---|
730 | u[c] = d |
---|
731 | # Keys are copied, values aren't |
---|
732 | v = copy.deepcopy(u) |
---|
733 | self.assertNotEqual(v, u) |
---|
734 | self.assertEqual(len(v), 2) |
---|
735 | (x, y), (z, t) = sorted(v.items(), key=lambda pair: pair[0].i) |
---|
736 | self.assertFalse(x is a) |
---|
737 | self.assertEqual(x.i, a.i) |
---|
738 | self.assertTrue(y is b) |
---|
739 | self.assertFalse(z is c) |
---|
740 | self.assertEqual(z.i, c.i) |
---|
741 | self.assertTrue(t is d) |
---|
742 | del x, y, z, t |
---|
743 | del d |
---|
744 | self.assertEqual(len(v), 1) |
---|
745 | |
---|
746 | def test_deepcopy_bound_method(self): |
---|
747 | class Foo(object): |
---|
748 | def m(self): |
---|
749 | pass |
---|
750 | f = Foo() |
---|
751 | f.b = f.m |
---|
752 | g = copy.deepcopy(f) |
---|
753 | self.assertEqual(g.m, g.b) |
---|
754 | self.assertTrue(g.b.im_self is g) |
---|
755 | g.b() |
---|
756 | |
---|
757 | |
---|
758 | def global_foo(x, y): return x+y |
---|
759 | |
---|
760 | def test_main(): |
---|
761 | test_support.run_unittest(TestCopy) |
---|
762 | |
---|
763 | if __name__ == "__main__": |
---|
764 | test_main() |
---|