test/union_set_controller_test.dart

// 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.

import 'package:collection/collection.dart';
import 'package:test/test.dart';

void main() {
  late UnionSetController<int> controller;
  late Set<int> innerSet;
  setUp(() {
    innerSet = {1, 2, 3};
    controller = UnionSetController()..add(innerSet);
  });

  test('exposes a union set', () {
    expect(controller.set, unorderedEquals([1, 2, 3]));

    controller.add({3, 4, 5});
    expect(controller.set, unorderedEquals([1, 2, 3, 4, 5]));

    controller.remove(innerSet);
    expect(controller.set, unorderedEquals([3, 4, 5]));
  });

  test('exposes a disjoint union set', () {
    expect(controller.set, unorderedEquals([1, 2, 3]));

    controller.add({4, 5, 6});
    expect(controller.set, unorderedEquals([1, 2, 3, 4, 5, 6]));

    controller.remove(innerSet);
    expect(controller.set, unorderedEquals([4, 5, 6]));
  });
}