@Test public void shouldFindEveryPair() {

  int[] inputArray = { 5, 2, 6, 1, 9 };
  int inputValue = 7;
  List<Pair<Integer, Integer>> result = findSums.find(inputArray, inputValue);
  assertTrue(result.contains(new Pair<Integer, Integer>(5, 2)));
  assertTrue(result.contains(new Pair<Integer, Integer>(6, 1)));
}