Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_module.py @ 86127:a3d09c19bb93

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merge with 3.3
author Georg Brandl <georg@python.org>
date Sun, 06 Oct 2013 19:24:00 +0200
parents cdddd3ed2ae1
children 07229c6104b1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Test the module type
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2 import unittest
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3 import weakref
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4 from test.support import run_unittest, gc_collect
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5 from test.script_helper import assert_python_ok
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6
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7 import sys
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8 ModuleType = type(sys)
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9
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10 class FullLoader:
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11 @classmethod
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12 def module_repr(cls, m):
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13 return "<module '{}' (crafted)>".format(m.__name__)
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14
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15 class BareLoader:
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16 pass
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17
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18
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19 class ModuleTests(unittest.TestCase):
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20 def test_uninitialized(self):
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21 # An uninitialized module has no __dict__ or __name__,
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22 # and __doc__ is None
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23 foo = ModuleType.__new__(ModuleType)
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24 self.assertTrue(foo.__dict__ is None)
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25 self.assertRaises(SystemError, dir, foo)
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26 try:
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27 s = foo.__name__
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28 self.fail("__name__ = %s" % repr(s))
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29 except AttributeError:
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30 pass
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31 self.assertEqual(foo.__doc__, ModuleType.__doc__)
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32
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33 def test_no_docstring(self):
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34 # Regularly initialized module, no docstring
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35 foo = ModuleType("foo")
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36 self.assertEqual(foo.__name__, "foo")
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37 self.assertEqual(foo.__doc__, None)
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38 self.assertIs(foo.__loader__, None)
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39 self.assertIs(foo.__package__, None)
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40 self.assertEqual(foo.__dict__, {"__name__": "foo", "__doc__": None,
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41 "__loader__": None, "__package__": None})
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42
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43 def test_ascii_docstring(self):
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44 # ASCII docstring
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45 foo = ModuleType("foo", "foodoc")
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46 self.assertEqual(foo.__name__, "foo")
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47 self.assertEqual(foo.__doc__, "foodoc")
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48 self.assertEqual(foo.__dict__,
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49 {"__name__": "foo", "__doc__": "foodoc",
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50 "__loader__": None, "__package__": None})
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51
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52 def test_unicode_docstring(self):
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53 # Unicode docstring
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54 foo = ModuleType("foo", "foodoc\u1234")
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55 self.assertEqual(foo.__name__, "foo")
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56 self.assertEqual(foo.__doc__, "foodoc\u1234")
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57 self.assertEqual(foo.__dict__,
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58 {"__name__": "foo", "__doc__": "foodoc\u1234",
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59 "__loader__": None, "__package__": None})
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60
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61 def test_reinit(self):
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62 # Reinitialization should not replace the __dict__
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63 foo = ModuleType("foo", "foodoc\u1234")
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64 foo.bar = 42
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65 d = foo.__dict__
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66 foo.__init__("foo", "foodoc")
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67 self.assertEqual(foo.__name__, "foo")
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68 self.assertEqual(foo.__doc__, "foodoc")
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69 self.assertEqual(foo.bar, 42)
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70 self.assertEqual(foo.__dict__,
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71 {"__name__": "foo", "__doc__": "foodoc", "bar": 42,
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72 "__loader__": None, "__package__": None})
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73 self.assertTrue(foo.__dict__ is d)
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74
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75 def test_dont_clear_dict(self):
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76 # See issue 7140.
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77 def f():
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78 foo = ModuleType("foo")
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79 foo.bar = 4
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80 return foo
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81 gc_collect()
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82 self.assertEqual(f().__dict__["bar"], 4)
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83
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84 def test_clear_dict_in_ref_cycle(self):
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85 destroyed = []
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86 m = ModuleType("foo")
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87 m.destroyed = destroyed
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88 s = """class A:
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89 def __init__(self, l):
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90 self.l = l
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91 def __del__(self):
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92 self.l.append(1)
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93 a = A(destroyed)"""
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94 exec(s, m.__dict__)
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95 del m
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96 gc_collect()
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97 self.assertEqual(destroyed, [1])
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98
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99 def test_weakref(self):
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100 m = ModuleType("foo")
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101 wr = weakref.ref(m)
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102 self.assertIs(wr(), m)
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103 del m
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104 gc_collect()
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105 self.assertIs(wr(), None)
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106
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107 def test_module_repr_minimal(self):
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108 # reprs when modules have no __file__, __name__, or __loader__
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109 m = ModuleType('foo')
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110 del m.__name__
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111 self.assertEqual(repr(m), "<module '?'>")
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112
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113 def test_module_repr_with_name(self):
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114 m = ModuleType('foo')
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115 self.assertEqual(repr(m), "<module 'foo'>")
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116
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117 def test_module_repr_with_name_and_filename(self):
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118 m = ModuleType('foo')
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119 m.__file__ = '/tmp/foo.py'
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120 self.assertEqual(repr(m), "<module 'foo' from '/tmp/foo.py'>")
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121
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122 def test_module_repr_with_filename_only(self):
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123 m = ModuleType('foo')
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124 del m.__name__
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125 m.__file__ = '/tmp/foo.py'
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126 self.assertEqual(repr(m), "<module '?' from '/tmp/foo.py'>")
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127
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128 def test_module_repr_with_loader_as_None(self):
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129 m = ModuleType('foo')
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130 assert m.__loader__ is None
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131 self.assertEqual(repr(m), "<module 'foo'>")
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132
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133 def test_module_repr_with_bare_loader_but_no_name(self):
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134 m = ModuleType('foo')
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135 del m.__name__
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136 # Yes, a class not an instance.
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137 m.__loader__ = BareLoader
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138 loader_repr = repr(BareLoader)
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139 self.assertEqual(
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140 repr(m), "<module '?' ({})>".format(loader_repr))
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141
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142 def test_module_repr_with_full_loader_but_no_name(self):
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143 # m.__loader__.module_repr() will fail because the module has no
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144 # m.__name__. This exception will get suppressed and instead the
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145 # loader's repr will be used.
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146 m = ModuleType('foo')
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147 del m.__name__
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148 # Yes, a class not an instance.
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149 m.__loader__ = FullLoader
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150 loader_repr = repr(FullLoader)
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151 self.assertEqual(
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152 repr(m), "<module '?' ({})>".format(loader_repr))
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153
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154 def test_module_repr_with_bare_loader(self):
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155 m = ModuleType('foo')
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156 # Yes, a class not an instance.
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157 m.__loader__ = BareLoader
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158 module_repr = repr(BareLoader)
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159 self.assertEqual(
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160 repr(m), "<module 'foo' ({})>".format(module_repr))
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161
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162 def test_module_repr_with_full_loader(self):
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163 m = ModuleType('foo')
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164 # Yes, a class not an instance.
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165 m.__loader__ = FullLoader
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166 self.assertEqual(
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167 repr(m), "<module 'foo' (crafted)>")
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168
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169 def test_module_repr_with_bare_loader_and_filename(self):
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170 # Because the loader has no module_repr(), use the file name.
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171 m = ModuleType('foo')
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172 # Yes, a class not an instance.
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173 m.__loader__ = BareLoader
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174 m.__file__ = '/tmp/foo.py'
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175 self.assertEqual(repr(m), "<module 'foo' from '/tmp/foo.py'>")
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176
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177 def test_module_repr_with_full_loader_and_filename(self):
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178 # Even though the module has an __file__, use __loader__.module_repr()
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179 m = ModuleType('foo')
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180 # Yes, a class not an instance.
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181 m.__loader__ = FullLoader
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182 m.__file__ = '/tmp/foo.py'
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183 self.assertEqual(repr(m), "<module 'foo' (crafted)>")
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184
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185 def test_module_repr_builtin(self):
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186 self.assertEqual(repr(sys), "<module 'sys' (built-in)>")
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187
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188 def test_module_repr_source(self):
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189 r = repr(unittest)
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190 self.assertEqual(r[:25], "<module 'unittest' from '")
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191 self.assertEqual(r[-13:], "__init__.py'>")
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192
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193 def test_module_finalization_at_shutdown(self):
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194 # Module globals and builtins should still be available during shutdown
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195 rc, out, err = assert_python_ok("-c", "from test import final_a")
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196 self.assertFalse(err)
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197 lines = out.splitlines()
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198 self.assertEqual(set(lines), {
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199 b"x = a",
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200 b"x = b",
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201 b"final_a.x = a",
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202 b"final_b.x = b",
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203 b"len = len",
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204 b"shutil.rmtree = rmtree"})
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205
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206 # frozen and namespace module reprs are tested in importlib.
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207
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208
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209 def test_main():
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210 run_unittest(ModuleTests)
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211
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212
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213 if __name__ == '__main__':
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214 test_main()