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