assertThat(Bytes.lastIndexOf(ARRAY234, (byte) 4)).isEqualTo(2);
    assertThat(Bytes.lastIndexOf(new byte[] {(byte) 2, (byte) 3, (byte) 2, (byte) 3}, (byte) 3))
        .isEqualTo(3);
  }

  public void testConcat() {
    assertThat(Bytes.concat()).isEqualTo(EMPTY);
    assertThat(Bytes.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Bytes.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThrows(
        IllegalArgumentException.class, () -> Chars.constrainToRange((char) 1, (char) 3, (char) 2));
  }

  public void testConcat() {
    assertThat(Chars.concat()).isEqualTo(EMPTY);
    assertThat(Chars.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Chars.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThat(Doubles.constrainToRange(5.0, 2.0, 2.0)).isEqualTo(2.0);
    assertThrows(IllegalArgumentException.class, () -> Doubles.constrainToRange(1.0, 3.0, 2.0));
  }

  public void testConcat() {
    assertThat(Doubles.concat()).isEqualTo(EMPTY);
    assertThat(Doubles.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Doubles.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThat(Ints.constrainToRange((int) 5, (int) 2, (int) 2)).isEqualTo((int) 2);
    assertThrows(
        IllegalArgumentException.class, () -> Ints.constrainToRange((int) 1, (int) 3, (int) 2));
  }

  public void testConcat() {
    assertThat(Ints.concat()).isEqualTo(EMPTY);
    assertThat(Ints.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Ints.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThat(Booleans.lastIndexOf(ARRAY_FALSE_TRUE, true)).isEqualTo(1);
    assertThat(Booleans.lastIndexOf(new boolean[] {false, true, true}, true)).isEqualTo(2);
  }

  public void testConcat() {
    assertThat(Booleans.concat()).isEqualTo(EMPTY);
    assertThat(Booleans.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Booleans.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThat(Doubles.constrainToRange(5.0, 2.0, 2.0)).isEqualTo(2.0);
    assertThrows(IllegalArgumentException.class, () -> Doubles.constrainToRange(1.0, 3.0, 2.0));
  }

  public void testConcat() {
    assertThat(Doubles.concat()).isEqualTo(EMPTY);
    assertThat(Doubles.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Doubles.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThat(Longs.constrainToRange(5L, 2L, 2L)).isEqualTo(2L);
    assertThrows(IllegalArgumentException.class, () -> Longs.constrainToRange(1L, 3L, 2L));
  }

  public void testConcat() {
    assertThat(Longs.concat()).isEqualTo(EMPTY);
    assertThat(Longs.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Longs.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThrows(
        IllegalArgumentException.class,
        () -> Shorts.constrainToRange((short) 1, (short) 3, (short) 2));
  }

  public void testConcat() {
    assertThat(Shorts.concat()).isEqualTo(EMPTY);
    assertThat(Shorts.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Shorts.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThat(Floats.constrainToRange(5.0f, 2.0f, 2.0f)).isEqualTo(2.0f);
    assertThrows(IllegalArgumentException.class, () -> Floats.constrainToRange(1.0f, 3.0f, 2.0f));
  }

  public void testConcat() {
    assertThat(Floats.concat()).isEqualTo(EMPTY);
    assertThat(Floats.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Floats.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);

    assertThat(Ints.constrainToRange((int) 5, (int) 2, (int) 2)).isEqualTo((int) 2);
    assertThrows(
        IllegalArgumentException.class, () -> Ints.constrainToRange((int) 1, (int) 3, (int) 2));
  }

  public void testConcat() {
    assertThat(Ints.concat()).isEqualTo(EMPTY);
    assertThat(Ints.concat(EMPTY)).isEqualTo(EMPTY);
    assertThat(Ints.concat(EMPTY, EMPTY, EMPTY)).isEqualTo(EMPTY);