@Test
public void invokeNotContainsNull() {

    FunctionTestUtil.assertResult(listContainsFunction.invoke(Collections.emptyList(), null), false);
    FunctionTestUtil.assertResult(listContainsFunction.invoke(Collections.singletonList(1), null), false);
    FunctionTestUtil.assertResult(listContainsFunction.invoke(Arrays.asList(1, 2), null), false);
}