@Test public void test() { Person p = new Person(); List<String> columns = new ArrayList<String>(); columns.add("column1"); columns.add("column2"); columns.add("column3"); DataRow<String> row = new DataRow<String>("1","person",columns); Assert.assertNotNull(row.getColumnFamilyName()); Assert.assertNotNull(row.getId()); Assert.assertNotNull(row.getColumns()); Assert.assertEquals(3,row.getColumns().size()); row.addColumn("column4"); Assert.assertEquals(4,row.getColumns().size()); }