LibTest/math/pow_A16_t01.dart

// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/// @assertion num pow(num x, num exponent)
/// For doubles, pow(x, y) handles edge cases as follows:
/// ...
///  - if [y] is -Infinity, the result is 1/pow([x], Infinity).
/// @description Checks the result when [y] is -Infinity.
/// @author pagolubev

import "dart:math" as Math;
import "../../Utils/expect.dart";

main() {
  if (!isJS) {
    Expect.equals(
        double.infinity, Math.pow(0.9999999999999999, double.negativeInfinity));
    Expect.equals(
        double.infinity,
        Math.pow(-0.9999999999999999, double.negativeInfinity));
    Expect.equals(double.infinity, Math.pow(0.5, double.negativeInfinity));
    Expect.equals(double.infinity, Math.pow(-0.5, double.negativeInfinity));
    Expect.equals(double.infinity,
        Math.pow(4.9406564584124654e-324, double.negativeInfinity));
    Expect.equals(double.infinity,
        Math.pow(-4.9406564584124654e-324, double.negativeInfinity));

    Expect.equals(1.0, Math.pow(-1, double.negativeInfinity));
    Expect.equals(1.0, Math.pow(-1.0, double.negativeInfinity));

    Expect.equals(.0, Math.pow(1.0000000000000002, double.negativeInfinity));
    Expect.equals(.0, Math.pow(-1.0000000000000002, double.negativeInfinity));
    Expect.equals(.0, Math.pow(2, double.negativeInfinity));
    Expect.equals(.0, Math.pow(-2, double.negativeInfinity));
    Expect.equals(.0, Math.pow(123.123, double.negativeInfinity));
    Expect.equals(.0, Math.pow(-123.123, double.negativeInfinity));
    Expect.equals(
        .0, Math.pow(1.7976931348623157e308, double.negativeInfinity));
    Expect.equals(
        .0, Math.pow(-1.7976931348623157e308, double.negativeInfinity));
  }
}