}

  public void testMinMaxNatural() {
    assertThat(min(1, 2)).isEqualTo(1);
    assertThat(min(2, 1)).isEqualTo(1);
    assertThat(max(1, 2)).isEqualTo(2);
    assertThat(max(2, 1)).isEqualTo(2);
  }

  public void testMinMaxNatural_equalInstances() {
    Foo a = new Foo(1);
    Foo b = new Foo(1);
    assertThat(min(a, b)).isSameInstanceAs(a);
    assertThat(max(a, b)).isSameInstanceAs(a);
  }

      assertEquals(min, ordering.min(first, second, third, rest));
      assertEquals(min, ordering.min(min, max));
      assertEquals(min, ordering.min(max, min));

      assertEquals(max, ordering.max(shuffledList));
      assertEquals(max, ordering.max(shuffledList.iterator()));
      assertEquals(max, ordering.max(first, second, third, rest));
      assertEquals(max, ordering.max(min, max));

      assertEquals(min, ordering.min(first, second, third, rest));
      assertEquals(min, ordering.min(min, max));
      assertEquals(min, ordering.min(max, min));

      assertEquals(max, ordering.max(shuffledList));
      assertEquals(max, ordering.max(shuffledList.iterator()));
      assertEquals(max, ordering.max(first, second, third, rest));
      assertEquals(max, ordering.max(min, max));

    int vacated = heap.fillHoleAt(index);
    // Try to see if toTrickle can be bubbled up min levels.
    int bubbledTo = heap.bubbleUpAlternatingLevels(vacated, toTrickle);
    if (bubbledTo == vacated) {
      // Could not bubble toTrickle up min levels, try moving
      // it from min level to max level (or max to min level) and bubble up
      // there.
      return heap.tryCrossOverAndBubbleUp(index, vacated, toTrickle);

    int vacated = heap.fillHoleAt(index);
    // Try to see if toTrickle can be bubbled up min levels.
    int bubbledTo = heap.bubbleUpAlternatingLevels(vacated, toTrickle);
    if (bubbledTo == vacated) {
      // Could not bubble toTrickle up min levels, try moving
      // it from min level to max level (or max to min level) and bubble up
      // there.
      return heap.tryCrossOverAndBubbleUp(index, vacated, toTrickle);

    UNIFORM_0_TO_9(0, 9),
    ALWAYS_0(0, 0),
    ALWAYS_10(10, 10);

    final int min;
    final int max;

    private ListSizeDistribution(int min, int max) {
      this.min = min;
      this.max = max;
    }

    public int chooseSize(Random random) {
      return random.nextInt(max - min + 1) + min;
    }
  }

   *     ordering.
   */
  @ParametricNullness
  public <E extends T> E min(
      @ParametricNullness E a, @ParametricNullness E b, @ParametricNullness E c, E... rest) {
    E minSoFar = min(min(a, b), c);

    for (E r : rest) {
      minSoFar = min(minSoFar, r);
    }

    return minSoFar;
  }

  /**

   *     ordering.
   */
  @ParametricNullness
  public <E extends T> E min(
      @ParametricNullness E a, @ParametricNullness E b, @ParametricNullness E c, E... rest) {
    E minSoFar = min(min(a, b), c);

    for (E r : rest) {
      minSoFar = min(minSoFar, r);
    }

    return minSoFar;
  }

  /**

    UNIFORM_0_TO_9(0, 9),
    ALWAYS_0(0, 0),
    ALWAYS_10(10, 10);

    final int min;
    final int max;

    private ListSizeDistribution(int min, int max) {
      this.min = min;
      this.max = max;
    }

    public int chooseSize(Random random) {
      return random.nextInt(max - min + 1) + min;
    }
  }

   * @throws IllegalArgumentException if {@code array} is empty
   */
  public static int min(int... array) {
    checkArgument(array.length > 0);
    int min = flip(array[0]);
    for (int i = 1; i < array.length; i++) {
      int next = flip(array[i]);
      if (next < min) {
        min = next;
      }
    }
    return flip(min);
  }

  /**