LibTest/core/Set/addAll_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  abstract void addAll(Iterable<E> elements)
 * Adds all of elements to this Set.
 * @description Checks that hash code collisions do not prevent addition of different
 * objects (not equal with regards to == operator) to the set.
 * @author pagolubev
 * @reviewer msyabro
 */
import "../../../Utils/expect.dart";

class A {
  A(this.x) {}
  bool operator==(A other) { return x == other.x; }
  int get hashCode { return -1; }
  int x;
}


main() {
  Set<A> s = new Set<A>();
  List a = [new A(7), new A(2), new A(-8), new A(2), new A(2)];
  s.addAll(a);
  Expect.isTrue(s.length == 3);
  Expect.isTrue(s.contains(new A(7)));
  Expect.isTrue(s.contains(new A(2)));
  Expect.isTrue(s.contains(new A(-8)));
}