UnsignedLong unsignedValue = UnsignedLong.fromLongBits(value);
      assertWithMessage("Double value of " + unsignedValue)
          .that(unsignedValue.doubleValue())
          .isWithin(0.0)
          .of(unsignedValue.bigIntegerValue().doubleValue());
    }
  }

  public void testPlus() {
    for (long a : TEST_LONGS) {
      for (long b : TEST_LONGS) {

      UnsignedLong unsignedValue = UnsignedLong.fromLongBits(value);
      assertWithMessage("Double value of " + unsignedValue)
          .that(unsignedValue.doubleValue())
          .isWithin(0.0)
          .of(unsignedValue.bigIntegerValue().doubleValue());
    }
  }

  public void testPlus() {
    for (long a : TEST_LONGS) {
      for (long b : TEST_LONGS) {

    checkArgument(values.hasNext(), "Cannot take mean of 0 values");
    long count = 1;
    double mean = checkFinite(values.next().doubleValue());
    while (values.hasNext()) {
      double value = checkFinite(values.next().doubleValue());
      count++;
      // Art of Computer Programming vol. 2, Knuth, 4.2.2, (15)
      mean += (value - mean) / count;
    }
    return mean;
  }

  }

  public void testConstantsEverySixteenthFactorial() {
    for (int i = 0, n = 0; n <= DoubleMath.MAX_FACTORIAL; i++, n += 16) {
      assertEquals(
          BigIntegerMath.factorial(n).doubleValue(), DoubleMath.everySixteenthFactorial[i]);
    }
  }

  @GwtIncompatible // DoubleMath.roundToInt(double, RoundingMode)
  public void testRoundIntegralDoubleToInt() {
    for (double d : INTEGRAL_DOUBLE_CANDIDATES) {

   */
  public static double meanOf(Iterator<? extends Number> values) {
    checkArgument(values.hasNext());
    long count = 1;
    double mean = values.next().doubleValue();
    while (values.hasNext()) {
      double value = values.next().doubleValue();
      count++;
      if (isFinite(value) && isFinite(mean)) {
        // Art of Computer Programming vol. 2, Knuth, 4.2.2, (15)
        mean += (value - mean) / count;

    reverse(array, fromIndex, toIndex);
  }

  /**
   * Returns an array containing each value of {@code collection}, converted to a {@code double}
   * value in the manner of {@link Number#doubleValue}.
   *
   * <p>Elements are copied from the argument collection as if by {@code collection.toArray()}.
   * Calling this method is as thread-safe as calling that method.
   *

  }

  public void testConstantsEverySixteenthFactorial() {
    for (int i = 0, n = 0; n <= DoubleMath.MAX_FACTORIAL; i++, n += 16) {
      assertEquals(
          BigIntegerMath.factorial(n).doubleValue(), DoubleMath.everySixteenthFactorial[i]);
    }
  }

  @GwtIncompatible // DoubleMath.roundToInt(double, RoundingMode)
  public void testRoundIntegralDoubleToInt() {
    for (double d : INTEGRAL_DOUBLE_CANDIDATES) {

        is ErrorValue.ErrorValueWithMessage -> KtConstantValue.KtErrorConstantValue(message, sourcePsi = null)
        is BooleanValue -> KtConstantValue.KtBooleanConstantValue(value, sourcePsi = null)
        is DoubleValue -> KtConstantValue.KtDoubleConstantValue(value, sourcePsi = null)
        is FloatValue -> KtConstantValue.KtFloatConstantValue(value, sourcePsi = null)
        is NullValue -> KtConstantValue.KtNullConstantValue(sourcePsi = null)

    assertSame(a, numberOrdering.min(a, b));
  }

  private static class NumberOrdering extends Ordering<Number> {
    @Override
    public int compare(Number a, Number b) {
      return ((Double) a.doubleValue()).compareTo(b.doubleValue());
    }

    @Override
    public int hashCode() {
      return NumberOrdering.class.hashCode();
    }

    @Override
    public boolean equals(@Nullable Object other) {

    assertSame(a, numberOrdering.min(a, b));
  }

  private static class NumberOrdering extends Ordering<Number> {
    @Override
    public int compare(Number a, Number b) {
      return ((Double) a.doubleValue()).compareTo(b.doubleValue());
    }

    @Override
    public int hashCode() {
      return NumberOrdering.class.hashCode();
    }

    @Override
    public boolean equals(@Nullable Object other) {