// 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.

// @dart = 2.9

/// @assertion final int length
/// @description Checks that length property contains correct size of the map.
/// @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.equals(3, base.length);

  base = new UnmodifiableMapBaseImpl({});
  Expect.equals(0, base.length);
}