mirror of https://github.com/python/cpython
75 lines
2.7 KiB
Python
75 lines
2.7 KiB
Python
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import os, sys, string, random, tempfile, unittest
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from 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.mktemp()
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os.mkdir(self.test_dir)
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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__.py'), 'w')
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self.module_path = os.path.join(self.package_dir, 'foo.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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compiled_path = self.module_path + 'c'
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if os.path.exists(compiled_path): os.remove(compiled_path)
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open(self.module_path, 'w').write(contents)
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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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module = __import__(self.module_name).foo
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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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reload(module)
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self.assertEqual(getattr(module, var), 1)
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run_unittest(TestImport)
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