| // 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() { |
| test("uses the given equality", () { |
| var set = new EqualitySet(const IterableEquality()); |
| expect(set, isEmpty); |
| |
| var list1 = [1, 2, 3]; |
| expect(set.add(list1), isTrue); |
| expect(set, contains([1, 2, 3])); |
| expect(set, contains(same(list1))); |
| |
| var list2 = [1, 2, 3]; |
| expect(set.add(list2), isFalse); |
| expect(set, contains([1, 2, 3])); |
| expect(set, contains(same(list1))); |
| expect(set, isNot(contains(same(list2)))); |
| |
| var list3 = [2, 3, 4]; |
| expect(set.add(list3), isTrue); |
| expect(set, contains(same(list1))); |
| expect(set, contains(same(list3))); |
| }); |
| |
| test("EqualitySet.from() prefers the lattermost equivalent value", () { |
| var list1 = [1, 2, 3]; |
| var list2 = [2, 3, 4]; |
| var list3 = [1, 2, 3]; |
| var list4 = [2, 3, 4]; |
| var list5 = [1, 2, 3]; |
| var list6 = [1, 2, 3]; |
| |
| var set = new EqualitySet.from(const IterableEquality(), |
| [list1, list2, list3, list4, list5, list6]); |
| |
| expect(set, contains(same(list1))); |
| expect(set, contains(same(list2))); |
| expect(set, isNot(contains(same(list3)))); |
| expect(set, isNot(contains(same(list4)))); |
| expect(set, isNot(contains(same(list5)))); |
| expect(set, isNot(contains(same(list6)))); |
| }); |
| } |