@Test
void testCombineTArrayTArray() {

    
    assertArrayEquals(new Integer[]{}, _Arrays.combine(new Integer[]{}));
    assertArrayEquals(new Integer[]{1, 2}, _Arrays.combine(new Integer[]{1, 2}));
    assertArrayEquals(new Integer[]{1, 2, 3}, _Arrays.combine(new Integer[]{1, 2}, 3));
    assertArrayEquals(new Integer[]{1, 2, 3, 4}, _Arrays.combine(new Integer[]{1, 2}, 3, 4));
}