### Question:
XlsUtils { public static String loadText(InputStream is) { if (is == null) return null; return loadText(loadDocument(is)); } private  XlsUtils(); static String loadText(InputStream is); static String loadText(HSSFWorkbook workbook); static List<String> findMarkers(InputStream is); static HSSFWorkbook format(InputStream is,
                                    Map<String, Object> markerValues); static HSSFWorkbook format(HSSFWorkbook workbook,
                                    Map<String, Object> markerValues); static HSSFWorkbook loadDocument(InputStream is);  }### Answer:
@Test public void testLoadText() throws Exception { String content = XlsUtils.loadText(this.getDocumentInputStream()); Assert.assertNotNull(content); Assert.assertTrue(content.length() > 0); }