@Test
public void no_detect_excel() throws Exception {

    InputStream inputStream = getClass().getResourceAsStream("fake.xls");
    Assertions.assertThat(XlsUtils.isNewExcelFormat(inputStream)).isFalse();
    inputStream = getClass().getResourceAsStream("fake.xls");
    Assertions.assertThat(XlsUtils.isNewExcelFormat(inputStream)).isFalse();
}