LibTest/math/MutableRectangle/operator_equality_A06_t01.dart

// Copyright (c) 2017, 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.
/// ...
/// The method should also be consistent over time, so whether two objects are
/// equal should only change if at least one of the objects was modified.
/// @description Checks that the equality operator should be consistent
/// over time.
/// @author ngl@unipru.ru

import "dart:math";
import "../../../Utils/expect.dart";
 
main() {
  MutableRectangle r1 = new MutableRectangle(1, 2, 10, 6);
  MutableRectangle r2 =
      new MutableRectangle.fromPoints(new Point(1, 8), new Point(11, 2));
  Expect.isTrue(r1 == r2);

  r1.height = 5;
  Expect.isFalse(r1 == r2);

  r2.height = 5;
  Expect.isTrue(r1 == r2);
}