LibTest/core/Set/remove_A01_t01.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 bool remove(T value)
 * Removes [value] from the set. Returns true if [value] was in the set.
 * Returns false otherwise. The method has no effect if [value] value was not in the set.
 * @description Checks that remove() works as specified in various simple scenarios.
 * @author pagolubev
 * @reviewer msyabro
 */
import "../../../Utils/expect.dart";


main() {
  Set<int> s = new Set<int>();

  Expect.isTrue(!s.remove(0));
  Expect.isTrue(s.length == 0);

  List<int> a = [-7, 5, 3, -22, 6, -1];
  s.addAll(a);

  Expect.isTrue(!s.remove(0));
  Expect.isTrue(s.length == a.length);
  Expect.isTrue(s.containsAll(a));

  Expect.isTrue(s.remove(5));
  Expect.isTrue(s.length == 5);
  Expect.isTrue(s.containsAll([-7, 3, -22, 6, -1]));
  Expect.isTrue(!s.contains(5));

  Expect.isTrue(!s.remove(5)); // remove the same value again
  Expect.isTrue(s.length == 5);
  Expect.isTrue(s.containsAll([-7, 3, -22, 6, -1]));
  Expect.isTrue(!s.contains(5));
}