Method check_round_trip

pandas/tests/io/test_feather.py:43–55

(
        self, df, temp_file, expected=None, write_kwargs=None, **read_kwargs
    )

            to_feather(df, temp_file)

    def check_round_trip(
        self, df, temp_file, expected=None, write_kwargs=None, **read_kwargs
    ):
        if write_kwargs is None:
            write_kwargs = {}
        if expected is None:
            expected = df.copy()

        to_feather(df, temp_file, **write_kwargs)

        result = read_feather(temp_file, **read_kwargs)

        tm.assert_frame_equal(result, expected)

    def test_error(self, temp_file):
        msg = "feather only support IO with DataFrames"