@Test
public void toStringTest() {
Row row = new Row(5);
row.setCell(0, new Cell(1, null));
row.setCell(1, new Cell(2, null));
row.setCell(2, new Cell(3, null));
row.setCell(3, new Cell(4, null));
row.setCell(4, new Cell(5, null));
Assert.assertEquals(row.toString(), "1,2,3,4,5,");
}