def METHOD_NAME():
    # Arrange
    df = pd.DataFrame({'foo': ['a', 'b'], 'bar': ['a', 'a']})
    check = PercentOfNulls().add_condition_percent_of_nulls_not_greater_than(0.01)
    # Act
    check_result = check.run(df)
    conditions_results = check.conditions_decision(check_result)
    assert_that(conditions_results, has_items(
        equal_condition_result(is_pass=True,
                               details='Passed for 2 relevant columns',
                               name='Percent of null values in each column is not greater than 1%')
    ))