/

there are problems with test#4 and test#5
2110 cannot be converted into 1021
and 987654321 into 123495678

@Test
public void test_04() {
    assertEquals(2110, DescendingOrder.sortDesc(1021));
}

@Test
public void test_05() {
    assertEquals(987654321, DescendingOrder.sortDesc(123495678));
}