@Test
public void invokeContainsNull() {

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