| // Copyright (c) 2011, 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. |
| |
| part of observable_tests; |
| |
| testAbstractObservable() { |
| group('addChangeListener()', () { |
| test('adding the same listener twice returns false the second time', () { |
| final target = new AbstractObservable(); |
| final listener = (e) { }; |
| |
| expect(target.addChangeListener(listener), isTrue); |
| expect(target.addChangeListener(listener), isFalse); |
| }); |
| |
| test('modifies listeners list', () { |
| // check that add/remove works, see contents of listeners too |
| final target = new AbstractObservable(); |
| final l1 = (e) { }; |
| final l2 = (e) { }; |
| final l3 = (e) { }; |
| final l4 = (e) { }; |
| |
| expect(target.listeners, orderedEquals([])); |
| |
| target.addChangeListener(l1); |
| expect(target.listeners, orderedEquals([l1])); |
| |
| target.addChangeListener(l2); |
| expect(target.listeners, orderedEquals([l1, l2])); |
| |
| target.addChangeListener(l3); |
| target.addChangeListener(l4); |
| expect(target.listeners, orderedEquals([l1, l2, l3, l4])); |
| |
| target.removeChangeListener(l4); |
| expect(target.listeners, orderedEquals([l1, l2, l3])); |
| |
| target.removeChangeListener(l2); |
| expect(target.listeners, orderedEquals([l1, l3])); |
| |
| target.removeChangeListener(l1); |
| expect(target.listeners, orderedEquals([l3])); |
| |
| target.removeChangeListener(l3); |
| expect(target.listeners, orderedEquals([])); |
| }); |
| }); |
| |
| test('fires immediately if no batch', () { |
| // If no batch is created, a summary should be automatically created and |
| // fired on each property change. |
| final target = new AbstractObservable(); |
| EventSummary res = null; |
| target.addChangeListener((summary) { |
| expect(res, isNull); |
| res = summary; |
| expect(res, isNotNull); |
| }); |
| |
| target.recordPropertyUpdate('pM', 10, 11); |
| |
| expect(res, isNotNull); |
| expect(res.events, hasLength(1)); |
| validateUpdate(res.events[0], target, 'pM', null, 10, 11); |
| res = null; |
| |
| target.recordPropertyUpdate('pL', '11', '13'); |
| |
| expect(res, isNotNull); |
| expect(res.events, hasLength(1)); |
| validateUpdate(res.events[0], target, 'pL', null, '11', '13'); |
| }); |
| } |