def _OpenFakeRegistryFile(self, key_path_prefix='<STR_LIT>'):
registry_file = fake.FakeWinRegistryFile(<EOL>key_path_prefix=key_path_prefix)<EOL>software_key = fake.FakeWinRegistryKey('<STR_LIT>')<EOL>registry_file.AddKeyByPath('<STR_LIT:\\>', software_key)<EOL>registry_file.Open(None)<EOL>return registry_file<EOL>
Opens a fake Windows Registry file.

        Args:
          key_path_prefix (str): Windows Registry key path prefix.

        Returns:
          FakeWinRegistryFileTest: fake Windows Registry file.