testSortDescending(
        new long[] {GREATEST - 1, 1, GREATEST - 2, 2},
        1,
        3,
        new long[] {GREATEST - 1, GREATEST - 2, 1, 2});
  }

  public void testDivide() {
    assertThat(UnsignedLongs.divide(14, 5)).isEqualTo(2);
    assertThat(UnsignedLongs.divide(0, 50)).isEqualTo(0);
    assertThat(UnsignedLongs.divide(0xfffffffffffffffeL, 0xfffffffffffffffdL)).isEqualTo(1);