test_imp.py 文件源码

def test_package___file__(self):
        try:
            m = __import__('pep3147')
        except ImportError:
            pass
        else:
            self.fail("pep3147 module already exists: %r" % (m,))
        # Test that a package's __file__ points to the right source directory.
        os.mkdir('pep3147')
        sys.path.insert(0, os.curdir)
        def cleanup():
            if sys.path[0] == os.curdir:
                del sys.path[0]
            shutil.rmtree('pep3147')
        self.addCleanup(cleanup)
        # Touch the __init__.py file.
        support.create_empty_file('pep3147/__init__.py')
        importlib.invalidate_caches()
        expected___file__ = os.sep.join(('.', 'pep3147', '__init__.py'))
        m = __import__('pep3147')
        self.assertEqual(m.__file__, expected___file__, (m.__file__, m.__path__, sys.path, sys.path_importer_cache))
        # Ensure we load the pyc file.
        support.unload('pep3147')
        m = __import__('pep3147')
        support.unload('pep3147')
        self.assertEqual(m.__file__, expected___file__, (m.__file__, m.__path__, sys.path, sys.path_importer_cache))