Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_import.py @ 58925:eecf1bef052d 2.6

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Merged revisions 78207 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r78207 | ezio.melotti | 2010-02-17 01:26:09 +0200 (Wed, 17 Feb 2010) | 1 line #7930: fix stripid ........
author Ezio Melotti <ezio.melotti@gmail.com>
date Tue, 16 Feb 2010 23:29:44 +0000
parents f20705875e80
children 55e2368f72f2
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rev   line source
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1 import unittest
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2 import os
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3 import stat
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4 import random
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5 import shutil
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6 import sys
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7 import py_compile
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8 import warnings
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9 import marshal
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10 from test.test_support import (unlink, TESTFN, unload, run_unittest,
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11 check_warnings, TestFailed)
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12
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13
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14 def remove_files(name):
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15 for f in (name + os.extsep + "py",
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16 name + os.extsep + "pyc",
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17 name + os.extsep + "pyo",
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18 name + os.extsep + "pyw",
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19 name + "$py.class"):
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20 if os.path.exists(f):
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21 os.remove(f)
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22
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23
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24 class ImportTest(unittest.TestCase):
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25
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26 def testCaseSensitivity(self):
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27 # Brief digression to test that import is case-sensitive: if we got this
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28 # far, we know for sure that "random" exists.
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29 try:
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30 import RAnDoM
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31 except ImportError:
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32 pass
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33 else:
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34 self.fail("import of RAnDoM should have failed (case mismatch)")
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35
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36 def testDoubleConst(self):
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37 # Another brief digression to test the accuracy of manifest float constants.
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38 from test import double_const # don't blink -- that *was* the test
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39
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40 def testImport(self):
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41 def test_with_extension(ext):
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42 # ext normally ".py"; perhaps ".pyw"
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43 source = TESTFN + ext
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44 pyo = TESTFN + os.extsep + "pyo"
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45 if sys.platform.startswith('java'):
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46 pyc = TESTFN + "$py.class"
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47 else:
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48 pyc = TESTFN + os.extsep + "pyc"
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49
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50 f = open(source, "w")
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51 print >> f, "# This tests Python's ability to import a", ext, "file."
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52 a = random.randrange(1000)
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53 b = random.randrange(1000)
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54 print >> f, "a =", a
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55 print >> f, "b =", b
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56 f.close()
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57
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58 try:
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59 try:
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60 mod = __import__(TESTFN)
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61 except ImportError, err:
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62 self.fail("import from %s failed: %s" % (ext, err))
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63
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64 self.assertEquals(mod.a, a,
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65 "module loaded (%s) but contents invalid" % mod)
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66 self.assertEquals(mod.b, b,
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67 "module loaded (%s) but contents invalid" % mod)
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68 finally:
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69 os.unlink(source)
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70
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71 try:
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72 try:
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73 reload(mod)
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74 except ImportError, err:
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75 self.fail("import from .pyc/.pyo failed: %s" % err)
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76 finally:
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77 try:
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78 os.unlink(pyc)
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79 except OSError:
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80 pass
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81 try:
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82 os.unlink(pyo)
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83 except OSError:
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84 pass
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85 del sys.modules[TESTFN]
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86
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87 sys.path.insert(0, os.curdir)
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88 try:
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89 test_with_extension(os.extsep + "py")
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90 if sys.platform.startswith("win"):
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91 for ext in ".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw":
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92 test_with_extension(ext)
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93 finally:
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94 del sys.path[0]
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95
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96 if os.name == 'posix':
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97 def test_execute_bit_not_copied(self):
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98 # Issue 6070: under posix .pyc files got their execute bit set if
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99 # the .py file had the execute bit set, but they aren't executable.
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100 oldmask = os.umask(022)
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101 sys.path.insert(0, os.curdir)
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102 try:
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103 fname = TESTFN + os.extsep + "py"
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104 f = open(fname, 'w').close()
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105 os.chmod(fname, (stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH |
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106 stat.S_IXUSR | stat.S_IXGRP | stat.S_IXOTH))
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107 __import__(TESTFN)
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108 fn = fname + 'c'
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109 if not os.path.exists(fn):
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110 fn = fname + 'o'
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111 if not os.path.exists(fn): raise TestFailed("__import__ did "
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112 "not result in creation of either a .pyc or .pyo file")
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113 s = os.stat(fn)
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114 self.assertEquals(stat.S_IMODE(s.st_mode),
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115 stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH)
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116 finally:
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117 os.umask(oldmask)
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118 remove_files(TESTFN)
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119 if TESTFN in sys.modules: del sys.modules[TESTFN]
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120 del sys.path[0]
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121
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122 def testImpModule(self):
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123 # Verify that the imp module can correctly load and find .py files
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124 import imp
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125 x = imp.find_module("os")
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126 os = imp.load_module("os", *x)
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127
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128 def test_module_with_large_stack(self, module='longlist'):
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129 # create module w/list of 65000 elements to test bug #561858
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130 filename = module + os.extsep + 'py'
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131
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132 # create a file with a list of 65000 elements
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133 f = open(filename, 'w+')
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134 f.write('d = [\n')
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135 for i in range(65000):
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136 f.write('"",\n')
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137 f.write(']')
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138 f.close()
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139
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140 # compile & remove .py file, we only need .pyc (or .pyo)
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141 f = open(filename, 'r')
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142 py_compile.compile(filename)
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143 f.close()
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144 os.unlink(filename)
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145
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146 # need to be able to load from current dir
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147 sys.path.append('')
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148
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149 # this used to crash
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150 exec 'import ' + module
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151
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152 # cleanup
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153 del sys.path[-1]
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154 for ext in 'pyc', 'pyo':
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155 fname = module + os.extsep + ext
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156 if os.path.exists(fname):
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157 os.unlink(fname)
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158
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159 def test_failing_import_sticks(self):
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160 source = TESTFN + os.extsep + "py"
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161 f = open(source, "w")
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162 print >> f, "a = 1/0"
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163 f.close()
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164
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165 # New in 2.4, we shouldn't be able to import that no matter how often
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166 # we try.
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167 sys.path.insert(0, os.curdir)
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168 try:
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169 for i in 1, 2, 3:
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170 try:
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171 mod = __import__(TESTFN)
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172 except ZeroDivisionError:
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173 if TESTFN in sys.modules:
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174 self.fail("damaged module in sys.modules on %i. try" % i)
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175 else:
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176 self.fail("was able to import a damaged module on %i. try" % i)
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177 finally:
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178 sys.path.pop(0)
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179 remove_files(TESTFN)
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180
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181 def test_failing_reload(self):
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182 # A failing reload should leave the module object in sys.modules.
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183 source = TESTFN + os.extsep + "py"
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184 f = open(source, "w")
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185 print >> f, "a = 1"
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186 print >> f, "b = 2"
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187 f.close()
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188
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189 sys.path.insert(0, os.curdir)
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190 try:
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191 mod = __import__(TESTFN)
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192 self.assert_(TESTFN in sys.modules, "expected module in sys.modules")
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193 self.assertEquals(mod.a, 1, "module has wrong attribute values")
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194 self.assertEquals(mod.b, 2, "module has wrong attribute values")
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195
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196 # On WinXP, just replacing the .py file wasn't enough to
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197 # convince reload() to reparse it. Maybe the timestamp didn't
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198 # move enough. We force it to get reparsed by removing the
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199 # compiled file too.
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200 remove_files(TESTFN)
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201
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202 # Now damage the module.
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203 f = open(source, "w")
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204 print >> f, "a = 10"
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205 print >> f, "b = 20//0"
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206 f.close()
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207
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208 self.assertRaises(ZeroDivisionError, reload, mod)
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209
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210 # But we still expect the module to be in sys.modules.
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211 mod = sys.modules.get(TESTFN)
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212 self.failIf(mod is None, "expected module to still be in sys.modules")
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213
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214 # We should have replaced a w/ 10, but the old b value should
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215 # stick.
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216 self.assertEquals(mod.a, 10, "module has wrong attribute values")
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217 self.assertEquals(mod.b, 2, "module has wrong attribute values")
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218
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219 finally:
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220 sys.path.pop(0)
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221 remove_files(TESTFN)
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222 if TESTFN in sys.modules:
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223 del sys.modules[TESTFN]
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01355124ce40 Whitespace normalization.
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224
41128
45ce388ec59a Bug #742342: make Python stop segfaulting on infinitely-recursive reload()s. Fixed by patch #922167.
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225 def test_infinite_reload(self):
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226 # Bug #742342 reports that Python segfaults (infinite recursion in C)
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227 # when faced with self-recursive reload()ing.
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228
41128
45ce388ec59a Bug #742342: make Python stop segfaulting on infinitely-recursive reload()s. Fixed by patch #922167.
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229 sys.path.insert(0, os.path.dirname(__file__))
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diff changeset
230 try:
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diff changeset
231 import infinite_reload
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diff changeset
232 finally:
45ce388ec59a Bug #742342: make Python stop segfaulting on infinitely-recursive reload()s. Fixed by patch #922167.
Collin Winter <collinw@gmail.com>
parents: 40455
diff changeset
233 sys.path.pop(0)
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234
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235 def test_import_name_binding(self):
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236 # import x.y.z binds x in the current namespace
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237 import test as x
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238 import test.test_support
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239 self.assert_(x is test, x.__name__)
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240 self.assert_(hasattr(test.test_support, "__file__"))
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241
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diff changeset
242 # import x.y.z as w binds z as w
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243 import test.test_support as y
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244 self.assert_(y is test.test_support, y.__name__)
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245
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246 def test_import_initless_directory_warning(self):
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247 with warnings.catch_warnings():
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248 # Just a random non-package directory we always expect to be
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249 # somewhere in sys.path...
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250 warnings.simplefilter('error', ImportWarning)
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251 self.assertRaises(ImportWarning, __import__, "site-packages")
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252
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253 def test_importbyfilename(self):
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254 path = os.path.abspath(TESTFN)
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255 try:
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256 __import__(path)
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diff changeset
257 except ImportError, err:
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258 self.assertEqual("Import by filename is not supported.",
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259 err.args[0])
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diff changeset
260 else:
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261 self.fail("import by path didn't raise an exception")
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262
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263
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264 class TestPycRewriting(unittest.TestCase):
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265 # Test that the `co_filename` attribute on code objects always points
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266 # to the right file, even when various things happen (e.g. both the .py
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267 # and the .pyc file are renamed).
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268
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269 module_name = "unlikely_module_name"
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270 module_source = """
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271 import sys
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272 code_filename = sys._getframe().f_code.co_filename
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273 module_filename = __file__
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274 constant = 1
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275 def func():
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276 pass
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277 func_filename = func.func_code.co_filename
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278 """
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279 dir_name = os.path.abspath(TESTFN)
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280 file_name = os.path.join(dir_name, module_name) + os.extsep + "py"
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281 compiled_name = file_name + ("c" if __debug__ else "o")
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282
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283 def setUp(self):
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284 self.sys_path = sys.path[:]
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285 self.orig_module = sys.modules.pop(self.module_name, None)
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286 os.mkdir(self.dir_name)
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287 with open(self.file_name, "w") as f:
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288 f.write(self.module_source)
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289 sys.path.insert(0, self.dir_name)
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290
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291 def tearDown(self):
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292 sys.path[:] = self.sys_path
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293 if self.orig_module is not None:
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294 sys.modules[self.module_name] = self.orig_module
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295 else:
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296 del sys.modules[self.module_name]
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297 for file_name in self.file_name, self.compiled_name:
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298 if os.path.exists(file_name):
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299 os.remove(file_name)
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300 if os.path.exists(self.dir_name):
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301 shutil.rmtree(self.dir_name)
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302
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303 def import_module(self):
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304 ns = globals()
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305 __import__(self.module_name, ns, ns)
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306 return sys.modules[self.module_name]
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307
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308 def test_basics(self):
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309 mod = self.import_module()
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310 self.assertEqual(mod.module_filename, self.file_name)
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311 self.assertEqual(mod.code_filename, self.file_name)
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312 self.assertEqual(mod.func_filename, self.file_name)
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313 del sys.modules[self.module_name]
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314 mod = self.import_module()
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315 self.assertEqual(mod.module_filename, self.compiled_name)
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316 self.assertEqual(mod.code_filename, self.file_name)
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317 self.assertEqual(mod.func_filename, self.file_name)
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318
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319 def test_incorrect_code_name(self):
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320 py_compile.compile(self.file_name, dfile="another_module.py")
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321 mod = self.import_module()
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322 self.assertEqual(mod.module_filename, self.compiled_name)
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323 self.assertEqual(mod.code_filename, self.file_name)
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324 self.assertEqual(mod.func_filename, self.file_name)
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325
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326 def test_module_without_source(self):
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327 target = "another_module.py"
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328 py_compile.compile(self.file_name, dfile=target)
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329 os.remove(self.file_name)
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330 mod = self.import_module()
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331 self.assertEqual(mod.module_filename, self.compiled_name)
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332 self.assertEqual(mod.code_filename, target)
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333 self.assertEqual(mod.func_filename, target)
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334
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335 def test_foreign_code(self):
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336 py_compile.compile(self.file_name)
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337 with open(self.compiled_name, "rb") as f:
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338 header = f.read(8)
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339 code = marshal.load(f)
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340 constants = list(code.co_consts)
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341 foreign_code = test_main.func_code
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342 pos = constants.index(1)
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343 constants[pos] = foreign_code
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344 code = type(code)(code.co_argcount, code.co_nlocals, code.co_stacksize,
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345 code.co_flags, code.co_code, tuple(constants),
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346 code.co_names, code.co_varnames, code.co_filename,
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347 code.co_name, code.co_firstlineno, code.co_lnotab,
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348 code.co_freevars, code.co_cellvars)
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349 with open(self.compiled_name, "wb") as f:
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350 f.write(header)
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351 marshal.dump(code, f)
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352 mod = self.import_module()
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353 self.assertEqual(mod.constant.co_filename, foreign_code.co_filename)
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354
43736
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355 class PathsTests(unittest.TestCase):
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356 path = TESTFN
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357
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358 def setUp(self):
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359 os.mkdir(self.path)
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360 self.syspath = sys.path[:]
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361
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362 def tearDown(self):
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363 shutil.rmtree(self.path)
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364 sys.path = self.syspath
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365
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366 # http://bugs.python.org/issue1293
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367 def test_trailing_slash(self):
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368 f = open(os.path.join(self.path, 'test_trailing_slash.py'), 'w')
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369 f.write("testdata = 'test_trailing_slash'")
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370 f.close()
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371 sys.path.append(self.path+'/')
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372 mod = __import__("test_trailing_slash")
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373 self.assertEqual(mod.testdata, 'test_trailing_slash')
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374 unload("test_trailing_slash")
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375
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376 class RelativeImport(unittest.TestCase):
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377 def tearDown(self):
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378 try:
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379 del sys.modules["test.relimport"]
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380 except:
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381 pass
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382
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383 def test_relimport_star(self):
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384 # This will import * from .test_import.
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385 from . import relimport
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386 self.assertTrue(hasattr(relimport, "RelativeImport"))
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387
47944
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388 def test_issue3221(self):
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389 def check_absolute():
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390 exec "from os import path" in ns
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391 def check_relative():
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392 exec "from . import relimport" in ns
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393 # Check both OK with __package__ and __name__ correct
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394 ns = dict(__package__='test', __name__='test.notarealmodule')
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395 check_absolute()
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396 check_relative()
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397 # Check both OK with only __name__ wrong
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398 ns = dict(__package__='test', __name__='notarealpkg.notarealmodule')
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diff changeset
399 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
400 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
401 # Check relative fails with only __package__ wrong
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
402 ns = dict(__package__='foo', __name__='test.notarealmodule')
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
403 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
404 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
405 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
406 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
407 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
408 # Check relative fails with __package__ and __name__ wrong
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 ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule')
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
410 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
411 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
412 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
413 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
414 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
415 # 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
416 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
417 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
418 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
419
39943
d743381131d6 Convert test_import to unittest.
Georg Brandl <georg@python.org>
parents: 38018
diff changeset
420 def test_main(verbose=None):
50618
617199769bd3 Merged revisions 68360 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents: 49146
diff changeset
421 run_unittest(ImportTest, TestPycRewriting, PathsTests, RelativeImport)
38018
b5e7d5b3c442 - Add new Warning class, ImportWarning
Thomas Wouters <thomas@python.org>
parents: 37408
diff changeset
422
39943
d743381131d6 Convert test_import to unittest.
Georg Brandl <georg@python.org>
parents: 38018
diff changeset
423 if __name__ == '__main__':
46565
0e1185bfa313 Allow test_import to work when it is invoked directly
Benjamin Peterson <benjamin@python.org>
parents: 45912
diff changeset
424 # 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
425 from test.test_import import test_main
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Georg Brandl <georg@python.org>
parents: 38018
diff changeset
426 test_main()