@Test
public void takeUnless() {
List<Integer> numberList = new ArrayList<>(Arrays.asList(1, 2, 3, 4, 5));
Predicate<Integer> positive = x -> x > 0;
Collection<Integer> result = Collections.takeUnless(positive, numberList);
assertEquals(emptyList(), result);
assertEquals(numberList, Collections.takeUnless(IS_NULL_PREDICATE, numberList));
assertEquals(emptyList(), Collections.takeUnless(NOT_NULL_PREDICATE, numberList));
}
