@Test
void testMapCollectionCollectionOfTClassOfRFunctionOfTR() {

    assertEquals(null, _Arrays.mapCollection((List<Integer>)null, Long.class, Long::valueOf));
    assertArrayEquals(new Long[] {}, _Arrays.mapCollection(Arrays.<Integer>asList(), Long.class, Long::valueOf));
    assertArrayEquals(new Long[] {1L, 2L, 3L}, _Arrays.mapCollection(Arrays.asList(1,2,3), Long.class, Long::valueOf));
}