.isEqualTo(1);
    assertThat(Longs.indexOf(new long[] {4L, 3L, 2L}, new long[] {2L, 3L, 4L})).isEqualTo(-1);
  }

  public void testLastIndexOf() {
    assertThat(Longs.lastIndexOf(EMPTY, 1L)).isEqualTo(-1);
    assertThat(Longs.lastIndexOf(ARRAY1, 2L)).isEqualTo(-1);
    assertThat(Longs.lastIndexOf(ARRAY234, 1L)).isEqualTo(-1);

            Shorts.indexOf(
                new short[] {(short) 4, (short) 3, (short) 2},
                new short[] {(short) 2, (short) 3, (short) 4}))
        .isEqualTo(-1);
  }

  public void testLastIndexOf() {
    assertThat(Shorts.lastIndexOf(EMPTY, (short) 1)).isEqualTo(-1);
    assertThat(Shorts.lastIndexOf(ARRAY1, (short) 2)).isEqualTo(-1);
    assertThat(Shorts.lastIndexOf(ARRAY234, (short) 1)).isEqualTo(-1);

          .isEqualTo(1);
    }
    assertThat(Floats.indexOf(new float[] {5f, NaN, NaN, 5f}, new float[] {NaN, NaN}))
        .isEqualTo(-1);
  }

  public void testLastIndexOf() {
    assertThat(Floats.lastIndexOf(EMPTY, 1.0f)).isEqualTo(-1);
    assertThat(Floats.lastIndexOf(ARRAY1, 2.0f)).isEqualTo(-1);
    assertThat(Floats.lastIndexOf(ARRAY234, 1.0f)).isEqualTo(-1);

        .isEqualTo(1);
    assertThat(
            Ints.indexOf(
                new int[] {(int) 4, (int) 3, (int) 2}, new int[] {(int) 2, (int) 3, (int) 4}))
        .isEqualTo(-1);
  }

  public void testLastIndexOf() {
    assertThat(Ints.lastIndexOf(EMPTY, (int) 1)).isEqualTo(-1);
    assertThat(Ints.lastIndexOf(ARRAY1, (int) 2)).isEqualTo(-1);
    assertThat(Ints.lastIndexOf(ARRAY234, (int) 1)).isEqualTo(-1);

          .isEqualTo(1);
    }
    assertThat(Floats.indexOf(new float[] {5f, NaN, NaN, 5f}, new float[] {NaN, NaN}))
        .isEqualTo(-1);
  }

  public void testLastIndexOf() {
    assertThat(Floats.lastIndexOf(EMPTY, 1.0f)).isEqualTo(-1);
    assertThat(Floats.lastIndexOf(ARRAY1, 2.0f)).isEqualTo(-1);
    assertThat(Floats.lastIndexOf(ARRAY234, 1.0f)).isEqualTo(-1);