LibTest/math/Rectangle/boundingBox_A01_t01.dart

// Copyright (c) 2014, 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 Rectangle<T> boundingBox(Rectangle<T> other)
/// Returns a new rectangle which completely contains this and other.
/// @description Checks that this operation is symmetric.
/// @author kaigorodov

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

const List<num> values = const [
   0, -1, 1, 10, -10, 100, -100,
   -4.5035996273704955E15, -4.294967296000001E9, -4.294967296E9,
   -4.2949672959999995E9, -6031769.5,-101.0, -100.00000000000001, -100.0,
   -99.99999999999999, -99.0, -10.0, -1.0000000000000002, -1.0,
   -.9999999999999999, -.7, .9999999999999999, 1.0, 1.0000000000000002, 10.0,
   99.0, 99.99999999999999, 100.0, 100.00000000000001, 101.0, 6031769.5,
   4.2949672959999995E9, 4.294967296E9, 4.294967296000001E9,
   4.5035996273704955E15, 4.503599627370496E15, 4.503599627370497E15,
   3.273390607896142,
 ];
 
Random rand = new Random(817);

num randomVal() {
  int k = rand.nextInt(values.length);
  return values[k];
}

void rectEquals(Rectangle r1, Rectangle r2, num tolerance, String msg) {
  Expect.approxEquals(r1.top, r2.top, tolerance, msg);
  Expect.approxEquals(r1.bottom, r2.bottom, tolerance, msg);
  Expect.approxEquals(r1.left, r2.left, tolerance, msg);
  Expect.approxEquals(r1.right, r2.right, tolerance, msg);
}

main() {
  for (int i = 0; i < 1000; i++) {
    num x = randomVal();
    num y = randomVal();
    num z = randomVal();
    num w = randomVal();
    Rectangle r1 = new Rectangle(x, y, z, w);
    Rectangle r2 = new Rectangle(z, w, x, y);
    Rectangle bb1 = r1.boundingBox(r2);
    Rectangle bb2 = r2.boundingBox(r1);
    rectEquals(
        bb1, bb2, 0.0001, "i=$i; x=$x, y=$y, z=$z, w=$w, bb1=$bb1, bb2=$bb2");
  }
}