assertNotNull(sheetComments.getCTComments().getCommentList());
assertNotNull(sheetComments.getCTComments().getAuthors());
assertEquals(1, sheetComments.getCTComments().getAuthors().sizeOfAuthorArray());
assertEquals(1, sheetComments.getNumberOfAuthors());
CTComment ctComment = sheetComments.newComment();
CTShape vmlShape = CTShape.Factory.newInstance();
XSSFComment comment = new XSSFComment(sheetComments, ctComment, vmlShape);
assertEquals(null, comment.getString());
assertEquals(0, comment.getRow());