Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_symtable.py @ 87690:66c1c9f32567 default tip

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents a78d7926c35d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 """
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2 Test the API of the symtable module.
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3 """
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4 import symtable
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5 import unittest
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6
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7 from test import support
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8
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10 TEST_CODE = """
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11 import sys
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12
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13 glob = 42
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15 class Mine:
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16 instance_var = 24
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17 def a_method(p1, p2):
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18 pass
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19
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20 def spam(a, b, *var, **kw):
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21 global bar
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22 bar = 47
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23 x = 23
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24 glob
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25 def internal():
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26 return x
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27 return internal
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29 def foo():
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30 pass
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31
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32 def namespace_test(): pass
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33 def namespace_test(): pass
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34 """
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35
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36
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37 def find_block(block, name):
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38 for ch in block.get_children():
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39 if ch.get_name() == name:
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40 return ch
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41
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42
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43 class SymtableTest(unittest.TestCase):
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45 top = symtable.symtable(TEST_CODE, "?", "exec")
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46 # These correspond to scopes in TEST_CODE
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47 Mine = find_block(top, "Mine")
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48 a_method = find_block(Mine, "a_method")
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49 spam = find_block(top, "spam")
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50 internal = find_block(spam, "internal")
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51 foo = find_block(top, "foo")
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52
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53 def test_type(self):
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54 self.assertEqual(self.top.get_type(), "module")
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55 self.assertEqual(self.Mine.get_type(), "class")
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56 self.assertEqual(self.a_method.get_type(), "function")
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57 self.assertEqual(self.spam.get_type(), "function")
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58 self.assertEqual(self.internal.get_type(), "function")
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59
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60 def test_optimized(self):
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61 self.assertFalse(self.top.is_optimized())
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62 self.assertFalse(self.top.has_exec())
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64 self.assertTrue(self.spam.is_optimized())
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66 def test_nested(self):
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67 self.assertFalse(self.top.is_nested())
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68 self.assertFalse(self.Mine.is_nested())
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69 self.assertFalse(self.spam.is_nested())
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70 self.assertTrue(self.internal.is_nested())
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72 def test_children(self):
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73 self.assertTrue(self.top.has_children())
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74 self.assertTrue(self.Mine.has_children())
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75 self.assertFalse(self.foo.has_children())
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76
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77 def test_lineno(self):
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78 self.assertEqual(self.top.get_lineno(), 0)
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79 self.assertEqual(self.spam.get_lineno(), 11)
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81 def test_function_info(self):
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82 func = self.spam
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83 self.assertEqual(sorted(func.get_parameters()), ["a", "b", "kw", "var"])
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84 expected = ["a", "b", "internal", "kw", "var", "x"]
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85 self.assertEqual(sorted(func.get_locals()), expected)
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86 self.assertEqual(sorted(func.get_globals()), ["bar", "glob"])
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87 self.assertEqual(self.internal.get_frees(), ("x",))
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88
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89 def test_globals(self):
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90 self.assertTrue(self.spam.lookup("glob").is_global())
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91 self.assertFalse(self.spam.lookup("glob").is_declared_global())
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92 self.assertTrue(self.spam.lookup("bar").is_global())
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93 self.assertTrue(self.spam.lookup("bar").is_declared_global())
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94 self.assertFalse(self.internal.lookup("x").is_global())
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95 self.assertFalse(self.Mine.lookup("instance_var").is_global())
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96
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97 def test_local(self):
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98 self.assertTrue(self.spam.lookup("x").is_local())
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99 self.assertFalse(self.internal.lookup("x").is_local())
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101 def test_referenced(self):
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102 self.assertTrue(self.internal.lookup("x").is_referenced())
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103 self.assertTrue(self.spam.lookup("internal").is_referenced())
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104 self.assertFalse(self.spam.lookup("x").is_referenced())
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105
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106 def test_parameters(self):
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107 for sym in ("a", "var", "kw"):
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108 self.assertTrue(self.spam.lookup(sym).is_parameter())
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109 self.assertFalse(self.spam.lookup("x").is_parameter())
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110
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111 def test_symbol_lookup(self):
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112 self.assertEqual(len(self.top.get_identifiers()),
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113 len(self.top.get_symbols()))
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114
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115 self.assertRaises(KeyError, self.top.lookup, "not_here")
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116
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117 def test_namespaces(self):
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118 self.assertTrue(self.top.lookup("Mine").is_namespace())
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119 self.assertTrue(self.Mine.lookup("a_method").is_namespace())
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120 self.assertTrue(self.top.lookup("spam").is_namespace())
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121 self.assertTrue(self.spam.lookup("internal").is_namespace())
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122 self.assertTrue(self.top.lookup("namespace_test").is_namespace())
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123 self.assertFalse(self.spam.lookup("x").is_namespace())
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124
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125 self.assertTrue(self.top.lookup("spam").get_namespace() is self.spam)
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126 ns_test = self.top.lookup("namespace_test")
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127 self.assertEqual(len(ns_test.get_namespaces()), 2)
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128 self.assertRaises(ValueError, ns_test.get_namespace)
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129
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130 def test_assigned(self):
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131 self.assertTrue(self.spam.lookup("x").is_assigned())
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132 self.assertTrue(self.spam.lookup("bar").is_assigned())
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133 self.assertTrue(self.top.lookup("spam").is_assigned())
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134 self.assertTrue(self.Mine.lookup("a_method").is_assigned())
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135 self.assertFalse(self.internal.lookup("x").is_assigned())
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136
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137 def test_imported(self):
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138 self.assertTrue(self.top.lookup("sys").is_imported())
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139
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140 def test_name(self):
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141 self.assertEqual(self.top.get_name(), "top")
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142 self.assertEqual(self.spam.get_name(), "spam")
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143 self.assertEqual(self.spam.lookup("x").get_name(), "x")
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144 self.assertEqual(self.Mine.get_name(), "Mine")
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145
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146 def test_class_info(self):
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147 self.assertEqual(self.Mine.get_methods(), ('a_method',))
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148
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149 def test_filename_correct(self):
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150 ### Bug tickler: SyntaxError file name correct whether error raised
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151 ### while parsing or building symbol table.
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152 def checkfilename(brokencode):
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153 try:
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154 symtable.symtable(brokencode, "spam", "exec")
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155 except SyntaxError as e:
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156 self.assertEqual(e.filename, "spam")
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157 else:
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158 self.fail("no SyntaxError for %r" % (brokencode,))
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159 checkfilename("def f(x): foo)(") # parse-time
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160 checkfilename("def f(x): global x") # symtable-build-time
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161
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162 def test_eval(self):
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163 symbols = symtable.symtable("42", "?", "eval")
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164
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165 def test_single(self):
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166 symbols = symtable.symtable("42", "?", "single")
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167
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168 def test_exec(self):
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169 symbols = symtable.symtable("def f(x): return x", "?", "exec")
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170
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171
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172 def test_main():
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173 support.run_unittest(SymtableTest)
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174
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175 if __name__ == '__main__':
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176 test_main()