blob: 8e4f8184b5b00f564919709455c081f9f01eb71a [file] [log] [blame]
// Copyright (c) 2016, 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 void retainAll(Iterable<Object> elements)
/// Removes all elements of this set that are not elements in [elements].
/// Checks for each element of elements whether there is an element in this set
/// that is equal to it (according to this.contains), and if so, the equal
/// element in this set is retained, and elements that are not equal to any
/// element in elements are removed.
/// @description Checks that retainAll() removes all elements of this set that
/// are not elements in [elements]
/// @author
library retainAll_A01_t01;
import "set.lib.dart";
import "../../../Utils/expect.dart";
test(Set create([Set content])) {
Set set = create();
Expect.equals(0, set.length);
set.retainAll([1, 2, 3].toSet());
Expect.equals(0, set.length);
set.addAll([1, 2, 3, 4, 5, 6, 7]);
set.retainAll([1, 2, 3].toSet());
Expect.equals(3, set.length);
Expect.isTrue(set.containsAll([1, 2, 3]));
main() {