@Test
public void success_JoinByteArray_2() {

    byte[] input1 = new byte[]{1, 2, 3, 4, 5};
    byte[] input2 = new byte[]{6, 7, 8, 9, 10};
    byte[] input3 = new byte[]{11, 12, 13, 14, 15};
    byte[] input4 = new byte[]{16, 17, 18, 19, 20};
    byte[] result = ByteUtils.join(input1, input2, input3, input4);
    assertThat(result, is(new byte[]{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20}));
}