@Test
public void invokeListsSomeDuplicates() {

    final Object[] params = new Object[]{Arrays.asList(10, 8, 3), Arrays.asList(1, 10, 2), Arrays.asList(10, 3, 2, 5)};
    FunctionTestUtil.assertResultList(unionFunction.invoke(params), Arrays.asList(10, 8, 3, 1, 2, 5));
}