Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_funcattrs.py @ 54294:dba767bc3155 legacy-trunk

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remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents 74c0a78114ae
children d75ab16413da
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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diff changeset
1 from test import test_support
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Guido van Rossum <guido@python.org>
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2 import types
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3 import unittest
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4
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5 class FuncAttrsTest(unittest.TestCase):
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6 def setUp(self):
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7 class F:
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8 def a(self):
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9 pass
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10 def b():
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11 return 3
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12 self.f = F
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13 self.fi = F()
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14 self.b = b
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15
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16 def cannot_set_attr(self,obj, name, value, exceptions):
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17 # This method is not called as a test (name doesn't start with 'test'),
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18 # but may be used by other tests.
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19 try: setattr(obj, name, value)
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20 except exceptions: pass
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21 else: self.fail("shouldn't be able to set %s to %r" % (name, value))
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22 try: delattr(obj, name)
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23 except exceptions: pass
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24 else: self.fail("shouldn't be able to del %s" % name)
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25
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26
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27 class FunctionPropertiesTest(FuncAttrsTest):
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28 # Include the external setUp method that is common to all tests
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29 def test_module(self):
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30 self.assertEqual(self.b.__module__, __name__)
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31
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32 def test_dir_includes_correct_attrs(self):
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33 self.b.known_attr = 7
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34 self.assert_('known_attr' in dir(self.b),
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35 "set attributes not in dir listing of method")
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36 # Test on underlying function object of method
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37 self.f.a.im_func.known_attr = 7
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38 self.assert_('known_attr' in dir(self.f.a),
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39 "set attribute on unbound method implementation in class not in "
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40 "dir")
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41 self.assert_('known_attr' in dir(self.fi.a),
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42 "set attribute on unbound method implementations, should show up"
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43 " in next dir")
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44
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45 def test_duplicate_function_equality(self):
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46 # Body of `duplicate' is the exact same as self.b
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47 def duplicate():
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48 'my docstring'
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49 return 3
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50 self.assertNotEqual(self.b, duplicate)
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52 def test_copying_func_code(self):
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53 def test(): pass
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54 self.assertEqual(test(), None)
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55 test.func_code = self.b.func_code
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56 self.assertEqual(test(), 3) # self.b always returns 3, arbitrarily
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58 def test_func_globals(self):
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59 self.assertEqual(self.b.func_globals, globals())
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60 self.cannot_set_attr(self.b, 'func_globals', 2, TypeError)
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61
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62 def test_func_name(self):
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63 self.assertEqual(self.b.__name__, 'b')
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64 self.assertEqual(self.b.func_name, 'b')
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65 self.b.__name__ = 'c'
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66 self.assertEqual(self.b.__name__, 'c')
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67 self.assertEqual(self.b.func_name, 'c')
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68 self.b.func_name = 'd'
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69 self.assertEqual(self.b.__name__, 'd')
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70 self.assertEqual(self.b.func_name, 'd')
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71 # __name__ and func_name must be a string
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72 self.cannot_set_attr(self.b, '__name__', 7, TypeError)
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73 self.cannot_set_attr(self.b, 'func_name', 7, TypeError)
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74 # __name__ must be available when in restricted mode. Exec will raise
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75 # AttributeError if __name__ is not available on f.
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76 s = """def f(): pass\nf.__name__"""
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77 exec s in {'__builtins__': {}}
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78 # Test on methods, too
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79 self.assertEqual(self.f.a.__name__, 'a')
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80 self.assertEqual(self.fi.a.__name__, 'a')
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81 self.cannot_set_attr(self.f.a, "__name__", 'a', AttributeError)
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82 self.cannot_set_attr(self.fi.a, "__name__", 'a', AttributeError)
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83
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84 def test_func_code(self):
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85 num_one, num_two = 7, 8
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86 def a(): pass
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87 def b(): return 12
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88 def c(): return num_one
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89 def d(): return num_two
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90 def e(): return num_one, num_two
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91 for func in [a, b, c, d, e]:
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92 self.assertEqual(type(func.func_code), types.CodeType)
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93 self.assertEqual(c(), 7)
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94 self.assertEqual(d(), 8)
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95 d.func_code = c.func_code
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96 self.assertEqual(c.func_code, d.func_code)
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97 self.assertEqual(c(), 7)
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98 # self.assertEqual(d(), 7)
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99 try: b.func_code = c.func_code
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100 except ValueError: pass
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101 else: self.fail(
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102 "func_code with different numbers of free vars should not be "
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103 "possible")
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104 try: e.func_code = d.func_code
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105 except ValueError: pass
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106 else: self.fail(
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107 "func_code with different numbers of free vars should not be "
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108 "possible")
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109
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110 def test_blank_func_defaults(self):
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111 self.assertEqual(self.b.func_defaults, None)
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112 del self.b.func_defaults
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113 self.assertEqual(self.b.func_defaults, None)
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114
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115 def test_func_default_args(self):
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116 def first_func(a, b):
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117 return a+b
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118 def second_func(a=1, b=2):
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119 return a+b
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120 self.assertEqual(first_func.func_defaults, None)
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121 self.assertEqual(second_func.func_defaults, (1, 2))
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122 first_func.func_defaults = (1, 2)
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123 self.assertEqual(first_func.func_defaults, (1, 2))
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124 self.assertEqual(first_func(), 3)
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parents: 44034
diff changeset
125 self.assertEqual(first_func(3), 5)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
126 self.assertEqual(first_func(3, 5), 8)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
127 del second_func.func_defaults
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
128 self.assertEqual(second_func.func_defaults, None)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
129 try: second_func()
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
130 except TypeError: pass
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
131 else: self.fail(
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
132 "func_defaults does not update; deleting it does not remove "
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
133 "requirement")
16043
8bac0659393e Add some regression tests of coredump bugs in funcobject.c 2.31. Also
Barry Warsaw <barry@python.org>
parents: 15897
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134
45105
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
135 class ImplicitReferencesTest(FuncAttrsTest):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
136 def test_im_class(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
137 self.assertEqual(self.f.a.im_class, self.f)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
138 self.assertEqual(self.fi.a.im_class, self.f)
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parents: 45105
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139 self.cannot_set_attr(self.f.a, "im_class", self.f, TypeError)
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Georg Brandl <georg@python.org>
parents: 45105
diff changeset
140 self.cannot_set_attr(self.fi.a, "im_class", self.f, TypeError)
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abd383f1905c The one thing I love more then writing code is deleting code.
Moshe Zadka <moshez@math.huji.ac.il>
parents: 16043
diff changeset
141
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
142 def test_im_func(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
143 self.f.b = self.b
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
144 self.assertEqual(self.f.b.im_func, self.b)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
145 self.assertEqual(self.fi.b.im_func, self.b)
45175
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Georg Brandl <georg@python.org>
parents: 45105
diff changeset
146 self.cannot_set_attr(self.f.b, "im_func", self.b, TypeError)
1c2a26686e54 Fix unittest conversion breakage.
Georg Brandl <georg@python.org>
parents: 45105
diff changeset
147 self.cannot_set_attr(self.fi.b, "im_func", self.b, TypeError)
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Moshe Zadka <moshez@math.huji.ac.il>
parents: 16043
diff changeset
148
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
149 def test_im_self(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
150 self.assertEqual(self.f.a.im_self, None)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
151 self.assertEqual(self.fi.a.im_self, self.fi)
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Georg Brandl <georg@python.org>
parents: 45105
diff changeset
152 self.cannot_set_attr(self.f.a, "im_self", None, TypeError)
1c2a26686e54 Fix unittest conversion breakage.
Georg Brandl <georg@python.org>
parents: 45105
diff changeset
153 self.cannot_set_attr(self.fi.a, "im_self", self.fi, TypeError)
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Guido van Rossum <guido@python.org>
parents: 19245
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154
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
155 def test_im_func_non_method(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
156 # Behavior should be the same when a method is added via an attr
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
157 # assignment
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
158 self.f.id = types.MethodType(id, None, self.f)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
159 self.assertEqual(self.fi.id(), id(self.fi))
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
160 self.assertNotEqual(self.fi.id(), id(self.f))
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
161 # Test usage
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
162 try: self.f.id.unknown_attr
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
163 except AttributeError: pass
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
164 else: self.fail("using unknown attributes should raise AttributeError")
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
165 # Test assignment and deletion
45175
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Georg Brandl <georg@python.org>
parents: 45105
diff changeset
166 self.cannot_set_attr(self.f.id, 'unknown_attr', 2, AttributeError)
1c2a26686e54 Fix unittest conversion breakage.
Georg Brandl <georg@python.org>
parents: 45105
diff changeset
167 self.cannot_set_attr(self.fi.id, 'unknown_attr', 2, AttributeError)
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Guido van Rossum <guido@python.org>
parents: 19948
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168
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
169 def test_implicit_method_properties(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
170 self.f.a.im_func.known_attr = 7
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
171 self.assertEqual(self.f.a.known_attr, 7)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
172 self.assertEqual(self.fi.a.known_attr, 7)
44011
4cf9bb9cef91 Issue #1445: Fix a SystemError when accessing the ``cell_contents``
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 34598
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173
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
174 class ArbitraryFunctionAttrTest(FuncAttrsTest):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
175 def test_set_attr(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
176 self.b.known_attr = 7
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
177 self.assertEqual(self.b.known_attr, 7)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
178 for func in [self.f.a, self.fi.a]:
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
179 try: func.known_attr = 7
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
180 except AttributeError: pass
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
181 else: self.fail("setting attributes on methods should raise error")
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Guido van Rossum <guido@python.org>
parents: 19245
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182
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
183 def test_delete_unknown_attr(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
184 try: del self.b.unknown_attr
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
185 except AttributeError: pass
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
186 else: self.fail("deleting unknown attribute should raise TypeError")
19948
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Guido van Rossum <guido@python.org>
parents: 19245
diff changeset
187
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
188 def test_setting_attrs_duplicates(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
189 try: self.f.a.klass = self.f
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
190 except AttributeError: pass
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
191 else: self.fail("setting arbitrary attribute in unbound function "
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
192 " should raise AttributeError")
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
193 self.f.a.im_func.klass = self.f
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
194 for method in [self.f.a, self.fi.a, self.fi.a.im_func]:
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
195 self.assertEqual(method.klass, self.f)
33116
3a4e73a5e434 Whitespace normalization.
Tim Peters <tim.peters@gmail.com>
parents: 33102
diff changeset
196
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
197 def test_unset_attr(self):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
198 for func in [self.b, self.f.a, self.fi.a]:
55049
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Jesus Cea <jcea@jcea.es>
parents: 45175
diff changeset
199 try: func.non_existent_attr
45105
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
200 except AttributeError: pass
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
201 else: self.fail("using unknown attributes should raise "
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
202 "AttributeError")
19948
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Guido van Rossum <guido@python.org>
parents: 19245
diff changeset
203
45105
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
204 class FunctionDictsTest(FuncAttrsTest):
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
205 def test_setting_dict_to_invalid(self):
45175
1c2a26686e54 Fix unittest conversion breakage.
Georg Brandl <georg@python.org>
parents: 45105
diff changeset
206 self.cannot_set_attr(self.b, '__dict__', None, TypeError)
1c2a26686e54 Fix unittest conversion breakage.
Georg Brandl <georg@python.org>
parents: 45105
diff changeset
207 self.cannot_set_attr(self.b, 'func_dict', None, TypeError)
45105
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
208 from UserDict import UserDict
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
209 d = UserDict({'known_attr': 7})
45175
1c2a26686e54 Fix unittest conversion breakage.
Georg Brandl <georg@python.org>
parents: 45105
diff changeset
210 self.cannot_set_attr(self.f.a.im_func, '__dict__', d, TypeError)
1c2a26686e54 Fix unittest conversion breakage.
Georg Brandl <georg@python.org>
parents: 45105
diff changeset
211 self.cannot_set_attr(self.fi.a.im_func, '__dict__', d, TypeError)
19948
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Guido van Rossum <guido@python.org>
parents: 19245
diff changeset
212
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
213 def test_setting_dict_to_valid(self):
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
214 d = {'known_attr': 7}
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
215 self.b.__dict__ = d
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
216 # Setting dict is only possible on the underlying function objects
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
217 self.f.a.im_func.__dict__ = d
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
218 # Test assignment
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
219 self.assertEqual(d, self.b.__dict__)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
220 self.assertEqual(d, self.b.func_dict)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
221 # ... and on all the different ways of referencing the method's func
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
222 self.assertEqual(d, self.f.a.im_func.__dict__)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
223 self.assertEqual(d, self.f.a.__dict__)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
224 self.assertEqual(d, self.fi.a.im_func.__dict__)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
225 self.assertEqual(d, self.fi.a.__dict__)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
226 # Test value
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
227 self.assertEqual(self.b.known_attr, 7)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
228 self.assertEqual(self.b.__dict__['known_attr'], 7)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
229 self.assertEqual(self.b.func_dict['known_attr'], 7)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
230 # ... and again, on all the different method's names
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
231 self.assertEqual(self.f.a.im_func.known_attr, 7)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
232 self.assertEqual(self.f.a.known_attr, 7)
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
233 self.assertEqual(self.fi.a.im_func.known_attr, 7)
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
234 self.assertEqual(self.fi.a.known_attr, 7)
19948
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Guido van Rossum <guido@python.org>
parents: 19245
diff changeset
235
45105
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Georg Brandl <georg@python.org>
parents: 44034
diff changeset
236 def test_delete_func_dict(self):
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
237 try: del self.b.__dict__
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
238 except TypeError: pass
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
239 else: self.fail("deleting function dictionary should raise TypeError")
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
240 try: del self.b.func_dict
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
241 except TypeError: pass
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
242 else: self.fail("deleting function dictionary should raise TypeError")
19955
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Guido van Rossum <guido@python.org>
parents: 19948
diff changeset
243
45105
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
244 def test_unassigned_dict(self):
d54d133c6a8d Rewrite test_funcattrs as unittest, written for GHOP by Jeff Wheeler.
Georg Brandl <georg@python.org>
parents: 44034
diff changeset
245 self.assertEqual(self.b.__dict__, {})
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246
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247 def test_func_as_dict_key(self):
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248 value = "Some string"
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249 d = {}
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250 d[self.b] = value
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251 self.assertEqual(d[self.b], value)
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252
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253 class FunctionDocstringTest(FuncAttrsTest):
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254 def test_set_docstring_attr(self):
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255 self.assertEqual(self.b.__doc__, None)
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256 self.assertEqual(self.b.func_doc, None)
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257 docstr = "A test method that does nothing"
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258 self.b.__doc__ = self.f.a.im_func.__doc__ = docstr
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259 self.assertEqual(self.b.__doc__, docstr)
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260 self.assertEqual(self.b.func_doc, docstr)
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261 self.assertEqual(self.f.a.__doc__, docstr)
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262 self.assertEqual(self.fi.a.__doc__, docstr)
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263 self.cannot_set_attr(self.f.a, "__doc__", docstr, AttributeError)
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264 self.cannot_set_attr(self.fi.a, "__doc__", docstr, AttributeError)
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265
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266 def test_delete_docstring(self):
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267 self.b.__doc__ = "The docstring"
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268 del self.b.__doc__
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269 self.assertEqual(self.b.__doc__, None)
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270 self.assertEqual(self.b.func_doc, None)
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271 self.b.func_doc = "The docstring"
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272 del self.b.func_doc
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273 self.assertEqual(self.b.__doc__, None)
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274 self.assertEqual(self.b.func_doc, None)
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275
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276 def test_main():
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277 test_support.run_unittest(FunctionPropertiesTest, ImplicitReferencesTest,
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278 ArbitraryFunctionAttrTest, FunctionDictsTest,
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279 FunctionDocstringTest)
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280
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281 if __name__ == "__main__":
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282 test_main()