Mercurial > cpython-lru_cache-weakref

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

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
remove mention of old ctypes version
author Benjamin Peterson <benjamin@python.org>
date Sat, 23 May 2009 20:59:09 +0000
parents bd74e866f9ca
children 6768b2350c57
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 import unittest
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2 import os
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3 import random
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bd2f8bb11bcc Backport of import tests for bug http://bugs.python.org/issue1293 and bug http://bugs.python.org/issue1342
Christian Heimes <christian@cheimes.de>
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4 import shutil
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5 import sys
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6 import py_compile
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7 import warnings
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8 import marshal
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f28b999a69f8 Issue #3781: Final cleanup of warnings.catch_warnings and its usage in the test suite. Closes issue w.r.t. 2.6 (R: Brett Cannon)
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9 from test.test_support import unlink, TESTFN, unload, run_unittest, check_warnings
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10
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11
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12 def remove_files(name):
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13 for f in (name + os.extsep + "py",
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14 name + os.extsep + "pyc",
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15 name + os.extsep + "pyo",
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16 name + os.extsep + "pyw",
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17 name + "$py.class"):
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18 if os.path.exists(f):
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19 os.remove(f)
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20
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21
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22 class ImportTest(unittest.TestCase):
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23
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24 def testCaseSensitivity(self):
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25 # Brief digression to test that import is case-sensitive: if we got this
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26 # far, we know for sure that "random" exists.
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27 try:
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28 import RAnDoM
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29 except ImportError:
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30 pass
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31 else:
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32 self.fail("import of RAnDoM should have failed (case mismatch)")
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33
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34 def testDoubleConst(self):
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35 # Another brief digression to test the accuracy of manifest float constants.
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36 from test import double_const # don't blink -- that *was* the test
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37
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38 def testImport(self):
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39 def test_with_extension(ext):
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40 # ext normally ".py"; perhaps ".pyw"
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41 source = TESTFN + ext
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42 pyo = TESTFN + os.extsep + "pyo"
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43 if sys.platform.startswith('java'):
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44 pyc = TESTFN + "$py.class"
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45 else:
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46 pyc = TESTFN + os.extsep + "pyc"
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47
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48 f = open(source, "w")
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49 print >> f, "# This tests Python's ability to import a", ext, "file."
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50 a = random.randrange(1000)
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51 b = random.randrange(1000)
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52 print >> f, "a =", a
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53 print >> f, "b =", b
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54 f.close()
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55
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56 try:
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57 try:
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58 mod = __import__(TESTFN)
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59 except ImportError, err:
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60 self.fail("import from %s failed: %s" % (ext, err))
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61
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62 self.assertEquals(mod.a, a,
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63 "module loaded (%s) but contents invalid" % mod)
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64 self.assertEquals(mod.b, b,
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65 "module loaded (%s) but contents invalid" % mod)
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66 finally:
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67 os.unlink(source)
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68
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69 try:
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70 try:
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71 reload(mod)
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72 except ImportError, err:
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73 self.fail("import from .pyc/.pyo failed: %s" % err)
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74 finally:
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75 try:
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76 os.unlink(pyc)
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77 except OSError:
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78 pass
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79 try:
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80 os.unlink(pyo)
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81 except OSError:
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82 pass
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83 del sys.modules[TESTFN]
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84
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85 sys.path.insert(0, os.curdir)
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86 try:
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87 test_with_extension(os.extsep + "py")
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88 if sys.platform.startswith("win"):
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89 for ext in ".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw":
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90 test_with_extension(ext)
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91 finally:
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92 del sys.path[0]
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93
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94 def testImpModule(self):
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95 # Verify that the imp module can correctly load and find .py files
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96 import imp
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97 x = imp.find_module("os")
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98 os = imp.load_module("os", *x)
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99
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100 def test_module_with_large_stack(self, module='longlist'):
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101 # create module w/list of 65000 elements to test bug #561858
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102 filename = module + os.extsep + 'py'
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103
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104 # create a file with a list of 65000 elements
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105 f = open(filename, 'w+')
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106 f.write('d = [\n')
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107 for i in range(65000):
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108 f.write('"",\n')
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109 f.write(']')
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110 f.close()
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111
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112 # compile & remove .py file, we only need .pyc (or .pyo)
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113 f = open(filename, 'r')
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114 py_compile.compile(filename)
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115 f.close()
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116 os.unlink(filename)
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117
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118 # need to be able to load from current dir
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119 sys.path.append('')
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120
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121 # this used to crash
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122 exec 'import ' + module
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123
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124 # cleanup
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125 del sys.path[-1]
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126 for ext in 'pyc', 'pyo':
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127 fname = module + os.extsep + ext
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128 if os.path.exists(fname):
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129 os.unlink(fname)
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130
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131 def test_failing_import_sticks(self):
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132 source = TESTFN + os.extsep + "py"
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133 f = open(source, "w")
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134 print >> f, "a = 1/0"
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135 f.close()
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136
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137 # New in 2.4, we shouldn't be able to import that no matter how often
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138 # we try.
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139 sys.path.insert(0, os.curdir)
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140 try:
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141 for i in 1, 2, 3:
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142 try:
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143 mod = __import__(TESTFN)
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144 except ZeroDivisionError:
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145 if TESTFN in sys.modules:
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146 self.fail("damaged module in sys.modules on %i. try" % i)
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147 else:
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148 self.fail("was able to import a damaged module on %i. try" % i)
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149 finally:
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150 sys.path.pop(0)
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151 remove_files(TESTFN)
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152
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153 def test_failing_reload(self):
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154 # A failing reload should leave the module object in sys.modules.
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155 source = TESTFN + os.extsep + "py"
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156 f = open(source, "w")
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157 print >> f, "a = 1"
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158 print >> f, "b = 2"
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159 f.close()
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160
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161 sys.path.insert(0, os.curdir)
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162 try:
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163 mod = __import__(TESTFN)
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164 self.assert_(TESTFN in sys.modules, "expected module in sys.modules")
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165 self.assertEquals(mod.a, 1, "module has wrong attribute values")
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166 self.assertEquals(mod.b, 2, "module has wrong attribute values")
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167
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168 # On WinXP, just replacing the .py file wasn't enough to
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169 # convince reload() to reparse it. Maybe the timestamp didn't
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170 # move enough. We force it to get reparsed by removing the
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171 # compiled file too.
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172 remove_files(TESTFN)
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173
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174 # Now damage the module.
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175 f = open(source, "w")
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176 print >> f, "a = 10"
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177 print >> f, "b = 20//0"
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178 f.close()
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179
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180 self.assertRaises(ZeroDivisionError, reload, mod)
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181
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182 # But we still expect the module to be in sys.modules.
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183 mod = sys.modules.get(TESTFN)
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184 self.failIf(mod is None, "expected module to still be in sys.modules")
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185
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186 # We should have replaced a w/ 10, but the old b value should
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187 # stick.
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188 self.assertEquals(mod.a, 10, "module has wrong attribute values")
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189 self.assertEquals(mod.b, 2, "module has wrong attribute values")
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190
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191 finally:
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192 sys.path.pop(0)
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193 remove_files(TESTFN)
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194 if TESTFN in sys.modules:
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195 del sys.modules[TESTFN]
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196
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197 def test_infinite_reload(self):
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198 # Bug #742342 reports that Python segfaults (infinite recursion in C)
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199 # when faced with self-recursive reload()ing.
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200
41128
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201 sys.path.insert(0, os.path.dirname(__file__))
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202 try:
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203 import infinite_reload
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204 finally:
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205 sys.path.pop(0)
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206
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207 def test_import_name_binding(self):
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208 # import x.y.z binds x in the current namespace
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209 import test as x
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210 import test.test_support
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211 self.assert_(x is test, x.__name__)
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212 self.assert_(hasattr(test.test_support, "__file__"))
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213
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214 # import x.y.z as w binds z as w
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215 import test.test_support as y
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216 self.assert_(y is test.test_support, y.__name__)
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217
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218 def test_import_initless_directory_warning(self):
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219 with warnings.catch_warnings():
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220 # Just a random non-package directory we always expect to be
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221 # somewhere in sys.path...
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222 warnings.simplefilter('error', ImportWarning)
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223 self.assertRaises(ImportWarning, __import__, "site-packages")
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224
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225 def test_importbyfilename(self):
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226 path = os.path.abspath(TESTFN)
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227 try:
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228 __import__(path)
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229 except ImportError, err:
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230 self.assertEqual("Import by filename is not supported.",
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231 err.args[0])
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232 else:
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233 self.fail("import by path didn't raise an exception")
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234
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235 class TestPycRewriting(unittest.TestCase):
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236 # Test that the `co_filename` attribute on code objects always points
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237 # to the right file, even when various things happen (e.g. both the .py
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238 # and the .pyc file are renamed).
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239
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240 module_name = "unlikely_module_name"
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241 module_source = """
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242 import sys
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243 code_filename = sys._getframe().f_code.co_filename
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244 module_filename = __file__
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245 constant = 1
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246 def func():
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247 pass
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248 func_filename = func.func_code.co_filename
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249 """
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250 dir_name = os.path.abspath(TESTFN)
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251 file_name = os.path.join(dir_name, module_name) + os.extsep + "py"
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252 compiled_name = file_name + ("c" if __debug__ else "o")
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253
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254 def setUp(self):
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255 self.sys_path = sys.path[:]
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256 self.orig_module = sys.modules.pop(self.module_name, None)
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257 os.mkdir(self.dir_name)
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258 with open(self.file_name, "w") as f:
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259 f.write(self.module_source)
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260 sys.path.insert(0, self.dir_name)
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261
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262 def tearDown(self):
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263 sys.path[:] = self.sys_path
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264 if self.orig_module is not None:
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265 sys.modules[self.module_name] = self.orig_module
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266 else:
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267 del sys.modules[self.module_name]
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268 for file_name in self.file_name, self.compiled_name:
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269 if os.path.exists(file_name):
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270 os.remove(file_name)
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271 if os.path.exists(self.dir_name):
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272 shutil.rmtree(self.dir_name)
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273
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274 def import_module(self):
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275 ns = globals()
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276 __import__(self.module_name, ns, ns)
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277 return sys.modules[self.module_name]
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278
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279 def test_basics(self):
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280 mod = self.import_module()
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281 self.assertEqual(mod.module_filename, self.file_name)
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282 self.assertEqual(mod.code_filename, self.file_name)
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283 self.assertEqual(mod.func_filename, self.file_name)
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284 del sys.modules[self.module_name]
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285 mod = self.import_module()
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286 self.assertEqual(mod.module_filename, self.compiled_name)
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287 self.assertEqual(mod.code_filename, self.file_name)
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288 self.assertEqual(mod.func_filename, self.file_name)
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289
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290 def test_incorrect_code_name(self):
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291 py_compile.compile(self.file_name, dfile="another_module.py")
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292 mod = self.import_module()
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293 self.assertEqual(mod.module_filename, self.compiled_name)
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294 self.assertEqual(mod.code_filename, self.file_name)
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295 self.assertEqual(mod.func_filename, self.file_name)
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296
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297 def test_module_without_source(self):
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298 target = "another_module.py"
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299 py_compile.compile(self.file_name, dfile=target)
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300 os.remove(self.file_name)
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301 mod = self.import_module()
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302 self.assertEqual(mod.module_filename, self.compiled_name)
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303 self.assertEqual(mod.code_filename, target)
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304 self.assertEqual(mod.func_filename, target)
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305
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306 def test_foreign_code(self):
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307 py_compile.compile(self.file_name)
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308 with open(self.compiled_name, "rb") as f:
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309 header = f.read(8)
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310 code = marshal.load(f)
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311 constants = list(code.co_consts)
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312 foreign_code = test_main.func_code
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313 pos = constants.index(1)
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314 constants[pos] = foreign_code
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315 code = type(code)(code.co_argcount, code.co_nlocals, code.co_stacksize,
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316 code.co_flags, code.co_code, tuple(constants),
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317 code.co_names, code.co_varnames, code.co_filename,
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318 code.co_name, code.co_firstlineno, code.co_lnotab,
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319 code.co_freevars, code.co_cellvars)
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320 with open(self.compiled_name, "wb") as f:
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321 f.write(header)
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322 marshal.dump(code, f)
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323 mod = self.import_module()
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324 self.assertEqual(mod.constant.co_filename, foreign_code.co_filename)
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325
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326 class PathsTests(unittest.TestCase):
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327 path = TESTFN
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328
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329 def setUp(self):
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330 os.mkdir(self.path)
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331 self.syspath = sys.path[:]
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332
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333 def tearDown(self):
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334 shutil.rmtree(self.path)
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335 sys.path = self.syspath
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336
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337 # http://bugs.python.org/issue1293
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338 def test_trailing_slash(self):
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339 f = open(os.path.join(self.path, 'test_trailing_slash.py'), 'w')
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340 f.write("testdata = 'test_trailing_slash'")
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341 f.close()
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342 sys.path.append(self.path+'/')
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343 mod = __import__("test_trailing_slash")
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344 self.assertEqual(mod.testdata, 'test_trailing_slash')
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345 unload("test_trailing_slash")
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346
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347 # http://bugs.python.org/issue3677
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348 def _test_UNC_path(self):
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349 f = open(os.path.join(self.path, 'test_trailing_slash.py'), 'w')
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350 f.write("testdata = 'test_trailing_slash'")
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351 f.close()
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352 #create the UNC path, like \\myhost\c$\foo\bar
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353 path = os.path.abspath(self.path)
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354 import socket
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355 hn = socket.gethostname()
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356 drive = path[0]
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357 unc = "\\\\%s\\%s$"%(hn, drive)
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358 unc += path[2:]
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359 sys.path.append(path)
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360 mod = __import__("test_trailing_slash")
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361 self.assertEqual(mod.testdata, 'test_trailing_slash')
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362 unload("test_trailing_slash")
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363
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364 if sys.platform == "win32":
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365 test_UNC_path = _test_UNC_path
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366
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367
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368 class RelativeImport(unittest.TestCase):
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369 def tearDown(self):
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370 try:
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371 del sys.modules["test.relimport"]
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372 except:
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373 pass
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374
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375 def test_relimport_star(self):
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376 # This will import * from .test_import.
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377 from . import relimport
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378 self.assertTrue(hasattr(relimport, "RelativeImport"))
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379
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380 def test_issue3221(self):
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381 def check_absolute():
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382 exec "from os import path" in ns
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383 def check_relative():
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384 exec "from . import relimport" in ns
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diff changeset
385 # Check both OK with __package__ and __name__ correct
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386 ns = dict(__package__='test', __name__='test.notarealmodule')
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387 check_absolute()
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diff changeset
388 check_relative()
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diff changeset
389 # Check both OK with only __name__ wrong
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diff changeset
390 ns = dict(__package__='test', __name__='notarealpkg.notarealmodule')
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diff changeset
391 check_absolute()
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diff changeset
392 check_relative()
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parents: 46565
diff changeset
393 # Check relative fails with only __package__ wrong
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diff changeset
394 ns = dict(__package__='foo', __name__='test.notarealmodule')
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395 with check_warnings() as w:
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diff changeset
396 check_absolute()
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397 self.assert_('foo' in str(w.message))
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diff changeset
398 self.assertEqual(w.category, RuntimeWarning)
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parents: 46565
diff changeset
399 self.assertRaises(SystemError, check_relative)
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parents: 46565
diff changeset
400 # Check relative fails with __package__ and __name__ wrong
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parents: 46565
diff changeset
401 ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule')
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f28b999a69f8 Issue #3781: Final cleanup of warnings.catch_warnings and its usage in the test suite. Closes issue w.r.t. 2.6 (R: Brett Cannon)
Nick Coghlan <ncoghlan@gmail.com>
parents: 49099
diff changeset
402 with check_warnings() as w:
47944
b90752c5e8c1 Fix issue 3221 by emitting a RuntimeWarning instead of raising SystemError when the parent module can't be found during an absolute import (likely due to non-PEP 361 aware code which sets a module level __package__ attribute)
Nick Coghlan <ncoghlan@gmail.com>
parents: 46565
diff changeset
403 check_absolute()
49146
f28b999a69f8 Issue #3781: Final cleanup of warnings.catch_warnings and its usage in the test suite. Closes issue w.r.t. 2.6 (R: Brett Cannon)
Nick Coghlan <ncoghlan@gmail.com>
parents: 49099
diff changeset
404 self.assert_('foo' in str(w.message))
f28b999a69f8 Issue #3781: Final cleanup of warnings.catch_warnings and its usage in the test suite. Closes issue w.r.t. 2.6 (R: Brett Cannon)
Nick Coghlan <ncoghlan@gmail.com>
parents: 49099
diff changeset
405 self.assertEqual(w.category, RuntimeWarning)
47944
b90752c5e8c1 Fix issue 3221 by emitting a RuntimeWarning instead of raising SystemError when the parent module can't be found during an absolute import (likely due to non-PEP 361 aware code which sets a module level __package__ attribute)
Nick Coghlan <ncoghlan@gmail.com>
parents: 46565
diff changeset
406 self.assertRaises(SystemError, check_relative)
b90752c5e8c1 Fix issue 3221 by emitting a RuntimeWarning instead of raising SystemError when the parent module can't be found during an absolute import (likely due to non-PEP 361 aware code which sets a module level __package__ attribute)
Nick Coghlan <ncoghlan@gmail.com>
parents: 46565
diff changeset
407 # Check both fail with package set to a non-string
b90752c5e8c1 Fix issue 3221 by emitting a RuntimeWarning instead of raising SystemError when the parent module can't be found during an absolute import (likely due to non-PEP 361 aware code which sets a module level __package__ attribute)
Nick Coghlan <ncoghlan@gmail.com>
parents: 46565
diff changeset
408 ns = dict(__package__=object())
b90752c5e8c1 Fix issue 3221 by emitting a RuntimeWarning instead of raising SystemError when the parent module can't be found during an absolute import (likely due to non-PEP 361 aware code which sets a module level __package__ attribute)
Nick Coghlan <ncoghlan@gmail.com>
parents: 46565
diff changeset
409 self.assertRaises(ValueError, check_absolute)
b90752c5e8c1 Fix issue 3221 by emitting a RuntimeWarning instead of raising SystemError when the parent module can't be found during an absolute import (likely due to non-PEP 361 aware code which sets a module level __package__ attribute)
Nick Coghlan <ncoghlan@gmail.com>
parents: 46565
diff changeset
410 self.assertRaises(ValueError, check_relative)
b90752c5e8c1 Fix issue 3221 by emitting a RuntimeWarning instead of raising SystemError when the parent module can't be found during an absolute import (likely due to non-PEP 361 aware code which sets a module level __package__ attribute)
Nick Coghlan <ncoghlan@gmail.com>
parents: 46565
diff changeset
411
39943
d743381131d6 Convert test_import to unittest.
Georg Brandl <georg@python.org>
parents: 38018
diff changeset
412 def test_main(verbose=None):
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617199769bd3 Merged revisions 68360 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 49146
diff changeset
413 run_unittest(ImportTest, TestPycRewriting, PathsTests, RelativeImport)
38018
b5e7d5b3c442 - Add new Warning class, ImportWarning
Thomas Wouters <thomas@python.org>
parents: 37408
diff changeset
414
39943
d743381131d6 Convert test_import to unittest.
Georg Brandl <georg@python.org>
parents: 38018
diff changeset
415 if __name__ == '__main__':
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0e1185bfa313 Allow test_import to work when it is invoked directly
Benjamin Peterson <benjamin@python.org>
parents: 45912
diff changeset
416 # test needs to be a package, so we can do relative import
0e1185bfa313 Allow test_import to work when it is invoked directly
Benjamin Peterson <benjamin@python.org>
parents: 45912
diff changeset
417 from test.test_import import test_main
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d743381131d6 Convert test_import to unittest.
Georg Brandl <georg@python.org>
parents: 38018
diff changeset
418 test_main()