def METHOD_NAME(df, expected_result_value,
                              ignore_columns=None, ignore_nan=True,
                              with_display=True):
    # Act
    result = IsSingleValue(ignore_columns=ignore_columns,
                           ignore_nan=ignore_nan).run(df, with_display=with_display)
    # Assert
    assert_that(result.value, equal_to(expected_result_value))
    return result