@Test
public void testCombinationSum4() throws Exception {
assertEquals("[]", combinationSum.combinationSum(new int[] {3, 3, 3}, 1).toString());
}
@Test
public void testCombinationSum2() throws Exception {
assertEquals(
"[[2, 2, 3], [7]]", combinationSum.combinationSum(new int[] {3, 6, 2, 7}, 7).toString());
}
@Test
public void testCombinationSum3() throws Exception {
assertEquals("[[1, 1, 1]]", combinationSum.combinationSum(new int[] {1}, 3).toString());
}
@Test
public void testCombinationSum1() throws Exception {
assertEquals(null, combinationSum.combinationSum(new int[] {}, 7));
assertEquals(null, combinationSum.combinationSum(null, 7));
}