input = Arrays.copyOf(input, input.length);
    Ints.sortDescending(input);
    assertThat(input).isEqualTo(expectedOutput);
  }

  private static void testSortDescending(
      int[] input, int fromIndex, int toIndex, int[] expectedOutput) {
    input = Arrays.copyOf(input, input.length);
    Ints.sortDescending(input, fromIndex, toIndex);
    assertThat(input).isEqualTo(expectedOutput);
  }

    Doubles.sortDescending(input);
    for (int i = 0; i < input.length; i++) {
      assertThat(input[i]).isEqualTo(expectedOutput[i]);
    }
  }

  private static void testSortDescending(
      double[] input, int fromIndex, int toIndex, double[] expectedOutput) {
    input = Arrays.copyOf(input, input.length);
    Doubles.sortDescending(input, fromIndex, toIndex);

    input = Arrays.copyOf(input, input.length);
    Floats.sortDescending(input);
    for (int i = 0; i < input.length; i++) {
      assertThat(input[i]).isEqualTo(expectedOutput[i]);
    }
  }

  private static void testSortDescending(
      float[] input, int fromIndex, int toIndex, float[] expectedOutput) {
    input = Arrays.copyOf(input, input.length);
    Floats.sortDescending(input, fromIndex, toIndex);

    input = Arrays.copyOf(input, input.length);
    Longs.sortDescending(input);
    assertThat(input).isEqualTo(expectedOutput);
  }

  private static void testSortDescending(
      long[] input, int fromIndex, int toIndex, long[] expectedOutput) {
    input = Arrays.copyOf(input, input.length);
    Longs.sortDescending(input, fromIndex, toIndex);
    assertThat(input).isEqualTo(expectedOutput);
  }