Utils/tests/Expect/equals_A01_t03.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 static void equals(var expected, var actual, [String reason = null])
/// Checks whether the expected and actual values are equal (using [:==:]).
/// @description Checks that object equality is checked with == operator (on expected value).
/// @author varlax

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

class A {
  operator ==(var b) {
    return true;
  }
}

class B {
  var checked;
  operator ==(var b) {
    checked = b;
    return b is B || b is A;
  }
}

class C {
  operator ==(var b) {
    return false;
  }
}


main() {
  B b = new B();
  Expect.identical(b.checked, null);
  var a1 = new B();
  Expect.equals(b, a1);
  Expect.identical(b.checked, a1);

  var a2 = new A();
  Expect.equals(b, a2);
  Expect.identical(b.checked, a2);

  Expect.equals(new A(), new C());

  try {
    Expect.equals(new C(), new C());
    throw "ExpectException expected";
  } on ExpectException {}
}