Mercurial > cpython-lru_cache-weakref

annotate Lib/importlib/test/test_util.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 9863bc8630a3
children 54a77c556d9a
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1 from importlib import util
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2 from . import util as test_util
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3 import imp
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4 import sys
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5 import types
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6 import unittest
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7
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8
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9 class ModuleForLoaderTests(unittest.TestCase):
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10
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11 """Tests for importlib.util.module_for_loader."""
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12
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13 def return_module(self, name):
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14 fxn = util.module_for_loader(lambda self, module: module)
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15 return fxn(self, name)
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16
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17 def raise_exception(self, name):
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18 def to_wrap(self, module):
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19 raise ImportError
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20 fxn = util.module_for_loader(to_wrap)
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21 try:
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22 fxn(self, name)
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23 except ImportError:
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24 pass
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25
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26 def test_new_module(self):
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27 # Test that when no module exists in sys.modules a new module is
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28 # created.
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29 module_name = 'a.b.c'
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30 with test_util.uncache(module_name):
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31 module = self.return_module(module_name)
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32 self.assertTrue(module_name in sys.modules)
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33 self.assertTrue(isinstance(module, types.ModuleType))
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34 self.assertEqual(module.__name__, module_name)
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35
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36 def test_reload(self):
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37 # Test that a module is reused if already in sys.modules.
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38 name = 'a.b.c'
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39 module = imp.new_module('a.b.c')
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40 with test_util.uncache(name):
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41 sys.modules[name] = module
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42 returned_module = self.return_module(name)
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43 self.assertIs(returned_module, sys.modules[name])
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44
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45 def test_new_module_failure(self):
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46 # Test that a module is removed from sys.modules if added but an
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47 # exception is raised.
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48 name = 'a.b.c'
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49 with test_util.uncache(name):
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50 self.raise_exception(name)
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51 self.assertTrue(name not in sys.modules)
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52
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53 def test_reload_failure(self):
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54 # Test that a failure on reload leaves the module in-place.
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55 name = 'a.b.c'
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56 module = imp.new_module(name)
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57 with test_util.uncache(name):
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58 sys.modules[name] = module
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59 self.raise_exception(name)
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60 self.assertIs(module, sys.modules[name])
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61
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62
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63 class SetPackageTests(unittest.TestCase):
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64
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65
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66 """Tests for importlib.util.set_package."""
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67
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68 def verify(self, module, expect):
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69 """Verify the module has the expected value for __package__ after
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70 passing through set_package."""
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71 fxn = lambda: module
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72 wrapped = util.set_package(fxn)
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73 wrapped()
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74 self.assertTrue(hasattr(module, '__package__'))
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75 self.assertEqual(expect, module.__package__)
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76
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77 def test_top_level(self):
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78 # __package__ should be set to the empty string if a top-level module.
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79 # Implicitly tests when package is set to None.
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80 module = imp.new_module('module')
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81 module.__package__ = None
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82 self.verify(module, '')
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83
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84 def test_package(self):
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85 # Test setting __package__ for a package.
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86 module = imp.new_module('pkg')
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87 module.__path__ = ['<path>']
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88 module.__package__ = None
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89 self.verify(module, 'pkg')
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90
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91 def test_submodule(self):
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92 # Test __package__ for a module in a package.
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93 module = imp.new_module('pkg.mod')
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94 module.__package__ = None
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95 self.verify(module, 'pkg')
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96
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97 def test_setting_if_missing(self):
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98 # __package__ should be set if it is missing.
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99 module = imp.new_module('mod')
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100 if hasattr(module, '__package__'):
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101 delattr(module, '__package__')
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102 self.verify(module, '')
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103
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104 def test_leaving_alone(self):
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105 # If __package__ is set and not None then leave it alone.
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106 for value in (True, False):
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107 module = imp.new_module('mod')
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108 module.__package__ = value
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109 self.verify(module, value)
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110
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111
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112 def test_main():
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113 from test import support
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114 support.run_unittest(ModuleForLoaderTests, SetPackageTests)
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115
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116
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117 if __name__ == '__main__':
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118 test_main()