Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_new.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 816c21c762c8
children 6768b2350c57
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1 import unittest
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2 from test import test_support
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3 import sys
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4 new = test_support.import_module('new', deprecated=True)
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5
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6 class NewTest(unittest.TestCase):
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7 def test_spam(self):
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8 class Eggs:
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9 def get_yolks(self):
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10 return self.yolks
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11
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12 m = new.module('Spam')
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13 m.Eggs = Eggs
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14 sys.modules['Spam'] = m
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15 import Spam
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16
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17 def get_more_yolks(self):
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18 return self.yolks + 3
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19
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20 # new.classobj()
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21 C = new.classobj('Spam', (Spam.Eggs,), {'get_more_yolks': get_more_yolks})
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22
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23 # new.instance()
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24 c = new.instance(C, {'yolks': 3})
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26 o = new.instance(C)
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27 self.assertEqual(o.__dict__, {}, "new __dict__ should be empty")
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28 del o
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29 o = new.instance(C, None)
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30 self.assertEqual(o.__dict__, {}, "new __dict__ should be empty")
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31 del o
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32
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33 def break_yolks(self):
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34 self.yolks = self.yolks - 2
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35
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36 # new.instancemethod()
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37 im = new.instancemethod(break_yolks, c, C)
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38
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39 self.assertEqual(c.get_yolks(), 3,
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40 'Broken call of hand-crafted class instance')
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41 self.assertEqual(c.get_more_yolks(), 6,
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42 'Broken call of hand-crafted class instance')
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43
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44 im()
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45 self.assertEqual(c.get_yolks(), 1,
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46 'Broken call of hand-crafted instance method')
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47 self.assertEqual(c.get_more_yolks(), 4,
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48 'Broken call of hand-crafted instance method')
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49
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50 im = new.instancemethod(break_yolks, c)
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51 im()
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52 self.assertEqual(c.get_yolks(), -1)
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53
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54 # Verify that dangerous instance method creation is forbidden
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55 self.assertRaises(TypeError, new.instancemethod, break_yolks, None)
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56
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57 # Verify that instancemethod() doesn't allow keyword args
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58 self.assertRaises(TypeError, new.instancemethod, break_yolks, c, kw=1)
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59
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60 def test_scope(self):
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61 # It's unclear what the semantics should be for a code object compiled
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62 # at module scope, but bound and run in a function. In CPython, `c' is
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63 # global (by accident?) while in Jython, `c' is local. The intent of
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64 # the test clearly is to make `c' global, so let's be explicit about it.
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65 codestr = '''
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66 global c
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67 a = 1
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68 b = 2
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69 c = a + b
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70 '''
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71
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72 codestr = "\n".join(l.strip() for l in codestr.splitlines())
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73
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74 ccode = compile(codestr, '<string>', 'exec')
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75 # Jython doesn't have a __builtins__, so use a portable alternative
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76 import __builtin__
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77 g = {'c': 0, '__builtins__': __builtin__}
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78
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79 # this test could be more robust
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80 func = new.function(ccode, g)
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81 func()
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82 self.assertEqual(g['c'], 3, 'Could not create a proper function object')
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83
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84 def test_function(self):
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85 # test the various extended flavors of function.new
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86 def f(x):
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87 def g(y):
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88 return x + y
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89 return g
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90 g = f(4)
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91 new.function(f.func_code, {}, "blah")
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92 g2 = new.function(g.func_code, {}, "blah", (2,), g.func_closure)
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93 self.assertEqual(g2(), 6)
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94 g3 = new.function(g.func_code, {}, "blah", None, g.func_closure)
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95 self.assertEqual(g3(5), 9)
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96 def test_closure(func, closure, exc):
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97 self.assertRaises(exc, new.function, func.func_code, {}, "", None, closure)
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98
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99 test_closure(g, None, TypeError) # invalid closure
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100 test_closure(g, (1,), TypeError) # non-cell in closure
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101 test_closure(g, (1, 1), ValueError) # closure is wrong size
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102 test_closure(f, g.func_closure, ValueError) # no closure needed
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103
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104 # Note: Jython will never have new.code()
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105 if hasattr(new, 'code'):
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106 def test_code(self):
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107 # bogus test of new.code()
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108 def f(a): pass
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109
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110 c = f.func_code
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111 argcount = c.co_argcount
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112 nlocals = c.co_nlocals
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113 stacksize = c.co_stacksize
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114 flags = c.co_flags
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115 codestring = c.co_code
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116 constants = c.co_consts
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117 names = c.co_names
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118 varnames = c.co_varnames
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119 filename = c.co_filename
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120 name = c.co_name
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121 firstlineno = c.co_firstlineno
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122 lnotab = c.co_lnotab
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123 freevars = c.co_freevars
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124 cellvars = c.co_cellvars
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125
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126 d = new.code(argcount, nlocals, stacksize, flags, codestring,
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127 constants, names, varnames, filename, name,
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128 firstlineno, lnotab, freevars, cellvars)
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129
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130 # test backwards-compatibility version with no freevars or cellvars
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131 d = new.code(argcount, nlocals, stacksize, flags, codestring,
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132 constants, names, varnames, filename, name,
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133 firstlineno, lnotab)
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134
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135 # negative co_argcount used to trigger a SystemError
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136 self.assertRaises(ValueError, new.code,
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137 -argcount, nlocals, stacksize, flags, codestring,
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138 constants, names, varnames, filename, name, firstlineno, lnotab)
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139
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140 # negative co_nlocals used to trigger a SystemError
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141 self.assertRaises(ValueError, new.code,
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142 argcount, -nlocals, stacksize, flags, codestring,
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143 constants, names, varnames, filename, name, firstlineno, lnotab)
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144
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145 # non-string co_name used to trigger a Py_FatalError
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146 self.assertRaises(TypeError, new.code,
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147 argcount, nlocals, stacksize, flags, codestring,
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148 constants, (5,), varnames, filename, name, firstlineno, lnotab)
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149
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150 # new.code used to be a way to mutate a tuple...
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151 class S(str):
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152 pass
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153 t = (S("ab"),)
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154 d = new.code(argcount, nlocals, stacksize, flags, codestring,
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155 constants, t, varnames, filename, name,
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156 firstlineno, lnotab)
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157 self.assert_(type(t[0]) is S, "eek, tuple changed under us!")
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158
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159 def test_main():
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160 test_support.run_unittest(NewTest)
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161
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162 if __name__ == "__main__":
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163 test_main()