Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_abc.py @ 78069:a8aa77458e12 3.2

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Add c_size_t and c_ssize_t to the ctypes summary table.
author Antoine Pitrou <solipsis@pitrou.net>
date Thu, 12 Jul 2012 20:31:50 +0200
parents 3c9232a684ae
children b39270c6b8d1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Copyright 2007 Google, Inc. All Rights Reserved.
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2 # Licensed to PSF under a Contributor Agreement.
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3
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4 """Unit tests for abc.py."""
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5
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6 import unittest
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7 from test import support
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8
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9 import abc
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10 from inspect import isabstract
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11
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12
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13 class TestABC(unittest.TestCase):
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14
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15 def test_abstractmethod_basics(self):
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16 @abc.abstractmethod
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17 def foo(self): pass
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18 self.assertTrue(foo.__isabstractmethod__)
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19 def bar(self): pass
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20 self.assertFalse(hasattr(bar, "__isabstractmethod__"))
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21
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22 def test_abstractproperty_basics(self):
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23 @abc.abstractproperty
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24 def foo(self): pass
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25 self.assertTrue(foo.__isabstractmethod__)
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26 def bar(self): pass
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27 self.assertFalse(hasattr(bar, "__isabstractmethod__"))
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28
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29 class C(metaclass=abc.ABCMeta):
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30 @abc.abstractproperty
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31 def foo(self): return 3
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32 class D(C):
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33 @property
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34 def foo(self): return super().foo
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35 self.assertEqual(D().foo, 3)
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36
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37 def test_abstractclassmethod_basics(self):
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38 @abc.abstractclassmethod
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39 def foo(cls): pass
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40 self.assertTrue(foo.__isabstractmethod__)
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41 @classmethod
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42 def bar(cls): pass
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43 self.assertFalse(hasattr(bar, "__isabstractmethod__"))
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44
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45 class C(metaclass=abc.ABCMeta):
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46 @abc.abstractclassmethod
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47 def foo(cls): return cls.__name__
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48 self.assertRaises(TypeError, C)
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49 class D(C):
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50 @classmethod
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51 def foo(cls): return super().foo()
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52 self.assertEqual(D.foo(), 'D')
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53 self.assertEqual(D().foo(), 'D')
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54
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55 def test_abstractstaticmethod_basics(self):
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56 @abc.abstractstaticmethod
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57 def foo(): pass
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58 self.assertTrue(foo.__isabstractmethod__)
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59 @staticmethod
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60 def bar(): pass
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61 self.assertFalse(hasattr(bar, "__isabstractmethod__"))
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62
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63 class C(metaclass=abc.ABCMeta):
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64 @abc.abstractstaticmethod
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65 def foo(): return 3
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66 self.assertRaises(TypeError, C)
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67 class D(C):
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68 @staticmethod
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69 def foo(): return 4
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70 self.assertEqual(D.foo(), 4)
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71 self.assertEqual(D().foo(), 4)
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72
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73 def test_abstractmethod_integration(self):
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74 for abstractthing in [abc.abstractmethod, abc.abstractproperty,
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75 abc.abstractclassmethod,
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76 abc.abstractstaticmethod]:
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77 class C(metaclass=abc.ABCMeta):
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78 @abstractthing
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79 def foo(self): pass # abstract
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80 def bar(self): pass # concrete
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81 self.assertEqual(C.__abstractmethods__, {"foo"})
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82 self.assertRaises(TypeError, C) # because foo is abstract
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83 self.assertTrue(isabstract(C))
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84 class D(C):
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85 def bar(self): pass # concrete override of concrete
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86 self.assertEqual(D.__abstractmethods__, {"foo"})
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87 self.assertRaises(TypeError, D) # because foo is still abstract
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88 self.assertTrue(isabstract(D))
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89 class E(D):
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90 def foo(self): pass
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91 self.assertEqual(E.__abstractmethods__, set())
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92 E() # now foo is concrete, too
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93 self.assertFalse(isabstract(E))
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94 class F(E):
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95 @abstractthing
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96 def bar(self): pass # abstract override of concrete
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97 self.assertEqual(F.__abstractmethods__, {"bar"})
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98 self.assertRaises(TypeError, F) # because bar is abstract now
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99 self.assertTrue(isabstract(F))
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100
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101 def test_metaclass_abc(self):
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102 # Metaclasses can be ABCs, too.
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103 class A(metaclass=abc.ABCMeta):
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104 @abc.abstractmethod
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105 def x(self):
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106 pass
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107 self.assertEqual(A.__abstractmethods__, {"x"})
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108 class meta(type, A):
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109 def x(self):
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110 return 1
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111 class C(metaclass=meta):
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112 pass
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113
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114 def test_registration_basics(self):
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115 class A(metaclass=abc.ABCMeta):
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116 pass
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117 class B(object):
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118 pass
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119 b = B()
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120 self.assertFalse(issubclass(B, A))
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121 self.assertFalse(issubclass(B, (A,)))
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122 self.assertNotIsInstance(b, A)
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123 self.assertNotIsInstance(b, (A,))
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124 A.register(B)
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125 self.assertTrue(issubclass(B, A))
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126 self.assertTrue(issubclass(B, (A,)))
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127 self.assertIsInstance(b, A)
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128 self.assertIsInstance(b, (A,))
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129 class C(B):
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130 pass
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131 c = C()
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132 self.assertTrue(issubclass(C, A))
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133 self.assertTrue(issubclass(C, (A,)))
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134 self.assertIsInstance(c, A)
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135 self.assertIsInstance(c, (A,))
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137 def test_isinstance_invalidation(self):
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138 class A(metaclass=abc.ABCMeta):
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139 pass
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140 class B:
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141 pass
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142 b = B()
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143 self.assertFalse(isinstance(b, A))
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144 self.assertFalse(isinstance(b, (A,)))
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145 A.register(B)
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146 self.assertTrue(isinstance(b, A))
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147 self.assertTrue(isinstance(b, (A,)))
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148
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149 def test_registration_builtins(self):
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150 class A(metaclass=abc.ABCMeta):
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151 pass
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152 A.register(int)
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153 self.assertIsInstance(42, A)
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154 self.assertIsInstance(42, (A,))
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155 self.assertTrue(issubclass(int, A))
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156 self.assertTrue(issubclass(int, (A,)))
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157 class B(A):
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158 pass
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159 B.register(str)
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160 class C(str): pass
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161 self.assertIsInstance("", A)
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162 self.assertIsInstance("", (A,))
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163 self.assertTrue(issubclass(str, A))
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164 self.assertTrue(issubclass(str, (A,)))
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165 self.assertTrue(issubclass(C, A))
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166 self.assertTrue(issubclass(C, (A,)))
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167
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168 def test_registration_edge_cases(self):
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169 class A(metaclass=abc.ABCMeta):
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170 pass
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171 A.register(A) # should pass silently
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172 class A1(A):
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173 pass
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174 self.assertRaises(RuntimeError, A1.register, A) # cycles not allowed
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175 class B(object):
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176 pass
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177 A1.register(B) # ok
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178 A1.register(B) # should pass silently
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179 class C(A):
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180 pass
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181 A.register(C) # should pass silently
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182 self.assertRaises(RuntimeError, C.register, A) # cycles not allowed
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183 C.register(B) # ok
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184
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185 def test_register_non_class(self):
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186 class A(metaclass=abc.ABCMeta):
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187 pass
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188 self.assertRaisesRegex(TypeError, "Can only register classes",
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189 A.register, 4)
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190
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191 def test_registration_transitiveness(self):
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192 class A(metaclass=abc.ABCMeta):
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193 pass
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194 self.assertTrue(issubclass(A, A))
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195 self.assertTrue(issubclass(A, (A,)))
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196 class B(metaclass=abc.ABCMeta):
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197 pass
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198 self.assertFalse(issubclass(A, B))
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199 self.assertFalse(issubclass(A, (B,)))
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200 self.assertFalse(issubclass(B, A))
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201 self.assertFalse(issubclass(B, (A,)))
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202 class C(metaclass=abc.ABCMeta):
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203 pass
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204 A.register(B)
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205 class B1(B):
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206 pass
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207 self.assertTrue(issubclass(B1, A))
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208 self.assertTrue(issubclass(B1, (A,)))
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209 class C1(C):
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210 pass
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211 B1.register(C1)
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212 self.assertFalse(issubclass(C, B))
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213 self.assertFalse(issubclass(C, (B,)))
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214 self.assertFalse(issubclass(C, B1))
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215 self.assertFalse(issubclass(C, (B1,)))
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216 self.assertTrue(issubclass(C1, A))
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217 self.assertTrue(issubclass(C1, (A,)))
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218 self.assertTrue(issubclass(C1, B))
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219 self.assertTrue(issubclass(C1, (B,)))
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220 self.assertTrue(issubclass(C1, B1))
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221 self.assertTrue(issubclass(C1, (B1,)))
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222 C1.register(int)
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223 class MyInt(int):
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224 pass
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225 self.assertTrue(issubclass(MyInt, A))
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226 self.assertTrue(issubclass(MyInt, (A,)))
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227 self.assertIsInstance(42, A)
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228 self.assertIsInstance(42, (A,))
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229
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230 def test_all_new_methods_are_called(self):
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231 class A(metaclass=abc.ABCMeta):
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232 pass
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233 class B(object):
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234 counter = 0
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235 def __new__(cls):
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236 B.counter += 1
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237 return super().__new__(cls)
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238 class C(A, B):
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239 pass
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240 self.assertEqual(B.counter, 0)
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241 C()
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242 self.assertEqual(B.counter, 1)
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243
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244
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245 def test_main():
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246 support.run_unittest(TestABC)
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247
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248
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249 if __name__ == "__main__":
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250 unittest.main()