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 // 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 double atan2(num a, num b) /// Returns the angle in radians between the positive x-axis and the vector /// ([b], [a]). /// @description Checks the result for standard angles. /// @author msyabro import "dart:math" as Math; import "../../Utils/expect.dart"; main() { Expect.equals(0.0, Math.atan2(0.0, 0.1)); Expect.equals(0.0, Math.atan2(0.0, 10)); Expect.equals(0.0, Math.atan2(0.0, double.infinity)); Expect.equals(0.0, Math.atan2(1, double.infinity)); Expect.equals(0.0, Math.atan2(0.0, 0.0)); Expect.equals(-0.0, Math.atan2(-0.0, 10)); Expect.equals(-0.0, Math.atan2(-0.0, 0.0)); Expect.equals(-0.0, Math.atan2(-1, double.infinity)); Expect.equals(Math.pi, Math.atan2(0.0, -0.1)); Expect.equals(Math.pi, Math.atan2(0.0, -10)); Expect.equals(Math.pi, Math.atan2(0.0, double.negativeInfinity)); Expect.equals(Math.pi, Math.atan2(1, double.negativeInfinity)); Expect.equals(Math.pi, Math.atan2(0.0, -0.0)); Expect.equals(-Math.pi, Math.atan2(-0.0, -0.1)); Expect.equals(-Math.pi, Math.atan2(-0.0, -0.0)); Expect.equals(-Math.pi, Math.atan2(-1, double.negativeInfinity)); Expect.equals(Math.pi / 2, Math.atan2(0.1, 0.0)); Expect.equals(Math.pi / 2, Math.atan2(10, -0.0)); Expect.equals(Math.pi / 2, Math.atan2(double.infinity, 0.0)); Expect.equals(Math.pi / 2, Math.atan2(double.infinity, 0.0)); Expect.equals(Math.pi / 2, Math.atan2(double.infinity, -1)); Expect.equals(-Math.pi / 2, Math.atan2(-0.1, 0.0)); Expect.equals(-Math.pi / 2, Math.atan2(-0.1, -0.0)); Expect.equals(-Math.pi / 2, Math.atan2(-10, 0.0)); Expect.equals(-Math.pi / 2, Math.atan2(double.negativeInfinity, 0.0)); Expect.equals(-Math.pi / 2, Math.atan2(double.negativeInfinity, 1)); Expect.equals(-Math.pi / 2, Math.atan2(double.negativeInfinity, -100)); Expect.equals(Math.pi / 4, Math.atan2(double.infinity, double.infinity)); Expect.equals(3 * Math.pi / 4, Math.atan2( double.infinity, double.negativeInfinity)); Expect.equals(-Math.pi / 4, Math.atan2( double.negativeInfinity, double.infinity)); Expect.equals(-3 * Math.pi / 4, Math.atan2( double.negativeInfinity, double.negativeInfinity)); }