@Test
public void testExpandWhenNothingToExpand() {

    List schema = Arrays.asList(new Object(), new Object(), new Object(), new Object());
    List<List> expected = Arrays.asList(
            Arrays.asList(1, 2, 3, 4),
            Arrays.asList("1", "2", "3", "4"),
            Arrays.asList("11", "12", "13", "14"),
            Arrays.asList("21", "22", "23", "24")
    );
    List<List> actual = PartnerResultToCrtesianTable.expand(expected, schema);
    assertEquals(actual, expected);
}