@Test
public void dimension_calculation() throws Exception {

    Assertions.assertThat(XlsUtils.getColumnsNumberFromDimension("A1:D5")).isEqualTo(4);
    Assertions.assertThat(XlsUtils.getColumnsNumberFromDimension("A1:A151")).isEqualTo(1);
    Assertions.assertThat(XlsUtils.getColumnsNumberFromDimension("B1:AG142")).isEqualTo(33);
}