def on_cleanup_error(function, path, excinfo):
                click.secho("warning: failed to remove file or directory: {}\n"
                            "please delete it manually.".format(path),
                            fg="red")
def __init__(self):
        self._calls = CallList()
        self._server_mock = None
        self.directory = []
        self.exception = None
        self.reset()