LibTest/collection/UnmodifiableMapBase/isEmpty_A01_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 final bool isEmpty
 * @description Check that [true] is returned only if the map is empty.
 * @author iarkh@unipro.ru
 */
import "dart:collection";
import "../../../Utils/expect.dart";
import "unmodifiablemapbase.lib.dart";

main() {
  UnmodifiableMapBase base = new UnmodifiableMapBaseImpl(
      {1 : 1, 2 : 23, 37 : 49});
  Expect.isFalse(base.isEmpty);

  base = new UnmodifiableMapBaseImpl({});
  Expect.isTrue(base.isEmpty);
}