def METHOD_NAME():
    duplicate_data = pd.DataFrame({'col1': [1, 2, 1, 2, 1, 2, 1, 2, 1, 2],
                                   'col2': [1, 2, 1, 2, 1, 2, 1, 2, 1, 2],
                                   'col3': list(range(10))})
    duplicate_data = duplicate_data.set_index('col3')
    check_obj = DataDuplicates()
    assert_that(check_obj.run(duplicate_data).value, close_to(0.80, 0.01))