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99d001ed0d
after a failed import. This is the last checkin in the "change import failure semantics" series.
82 lines
2.8 KiB
Python
82 lines
2.8 KiB
Python
import os, sys, string, random, tempfile, unittest
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from test.test_support import run_unittest
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class TestImport(unittest.TestCase):
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def __init__(self, *args, **kw):
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self.package_name = 'PACKAGE_'
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while sys.modules.has_key(self.package_name):
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self.package_name += random.choose(string.letters)
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self.module_name = self.package_name + '.foo'
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unittest.TestCase.__init__(self, *args, **kw)
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def remove_modules(self):
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for module_name in (self.package_name, self.module_name):
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if sys.modules.has_key(module_name):
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del sys.modules[module_name]
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def setUp(self):
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self.test_dir = tempfile.mkdtemp()
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sys.path.append(self.test_dir)
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self.package_dir = os.path.join(self.test_dir,
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self.package_name)
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os.mkdir(self.package_dir)
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open(os.path.join(self.package_dir, '__init__'+os.extsep+'py'), 'w')
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self.module_path = os.path.join(self.package_dir, 'foo'+os.extsep+'py')
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def tearDown(self):
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for file in os.listdir(self.package_dir):
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os.remove(os.path.join(self.package_dir, file))
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os.rmdir(self.package_dir)
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os.rmdir(self.test_dir)
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self.assertNotEqual(sys.path.count(self.test_dir), 0)
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sys.path.remove(self.test_dir)
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self.remove_modules()
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def rewrite_file(self, contents):
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for extension in "co":
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compiled_path = self.module_path + extension
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if os.path.exists(compiled_path):
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os.remove(compiled_path)
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f = open(self.module_path, 'w')
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f.write(contents)
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f.close()
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def test_package_import__semantics(self):
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# Generate a couple of broken modules to try importing.
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# ...try loading the module when there's a SyntaxError
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self.rewrite_file('for')
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try: __import__(self.module_name)
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except SyntaxError: pass
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else: raise RuntimeError, 'Failed to induce SyntaxError'
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self.assert_(not sys.modules.has_key(self.module_name) and
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not hasattr(sys.modules[self.package_name], 'foo'))
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# ...make up a variable name that isn't bound in __builtins__
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var = 'a'
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while var in dir(__builtins__):
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var += random.choose(string.letters)
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# ...make a module that just contains that
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self.rewrite_file(var)
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try: __import__(self.module_name)
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except NameError: pass
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else: raise RuntimeError, 'Failed to induce NameError.'
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# ...now change the module so that the NameError doesn't
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# happen
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self.rewrite_file('%s = 1' % var)
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module = __import__(self.module_name).foo
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self.assertEqual(getattr(module, var), 1)
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def test_main():
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run_unittest(TestImport)
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if __name__ == "__main__":
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test_main()
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