# Source code for cherrypy.test.test_plugins

    from cherrypy.process import plugins

    __metaclass__ = type

    class TestAutoreloader:

        def test_file_for_file_module_when_None(self):
            """No error when ``module.__file__`` is :py:data:`None`."""
            class test_module:
                __file__ = None

            assert plugins.Autoreloader._file_for_file_module(test_module) is None