LibTest/math/Rectangle/operator_equality_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 bool operator ==(other)
/// The equality operator.
/// A Rectangle is equal to another Rectangle with the same coordinates.
/// @description Checks that this operator uses value comparison rather than
/// identity comparison.
/// @author kaigorodov

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

const List<num> values = const [
   0, -1, 1, 10, -10, 100, -100,
   -1.7976931348623157e308, -3.273390607896142E150, -4.503599627370497E15,
   -4.503599627370496E15, -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, -2.2250738585072014e-308,
   -4.9406564584124654e-324, .0, 4.9406564584124654e-324,
   2.2250738585072014e-308, .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,
   3.273390607896142E150, 1.7976931348623157e308
 ];
 
Random rand = new Random(911);

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

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(x, y, z, w);
    Expect.isFalse(identical(r1, r2));
    Expect.isTrue(r1 == r2, "x=$x, y=$y, z=$z, w=$w");
  }
}