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| 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 library mutationobserver_test; |
| 6 import 'package:unittest/unittest.dart'; |
| 7 import 'package:unittest/html_individual_config.dart'; |
| 8 import 'dart:html'; |
| 9 |
| 10 // Due to https://code.google.com/p/chromium/issues/detail?id=329103 |
| 11 // mutationObservers sometimes do not fire if the node being observed is GCed |
| 12 // so we keep around references to all nodes we have created mutation |
| 13 // observers for. |
| 14 var keepAlive = []; |
| 15 |
| 16 /** |
| 17 * Test suite for Mutation Observers. This is just a small set of sanity |
| 18 * checks, not a complete test suite. |
| 19 */ |
| 20 main() { |
| 21 useHtmlIndividualConfiguration(); |
| 22 |
| 23 group('supported', () { |
| 24 test('supported', () { |
| 25 expect(MutationObserver.supported, true); |
| 26 }); |
| 27 }); |
| 28 |
| 29 var expectation = MutationObserver.supported ? returnsNormally : throws; |
| 30 |
| 31 group('childList', () { |
| 32 mutationCallback(count, expectation) { |
| 33 var done = false; |
| 34 var nodes = []; |
| 35 |
| 36 callback(mutations, observer) { |
| 37 for (MutationRecord mutation in mutations) { |
| 38 for (Node node in mutation.addedNodes) { |
| 39 nodes.add(node); |
| 40 } |
| 41 } |
| 42 if (nodes.length >= count) { |
| 43 done = true; |
| 44 expect(nodes.length, count); |
| 45 expect(nodes, expectation); |
| 46 } |
| 47 } |
| 48 |
| 49 // If it's not supported, don't block waiting for it. |
| 50 if (!MutationObserver.supported) { |
| 51 return () => done; |
| 52 } |
| 53 |
| 54 return expectAsyncUntil(callback, () => done); |
| 55 } |
| 56 |
| 57 test('empty options is syntax error', () { |
| 58 expect(() { |
| 59 var mutationObserver = new MutationObserver( |
| 60 (mutations, observer) { expect(false, isTrue, |
| 61 reason: 'Should not be reached'); }); |
| 62 expect(() { mutationObserver.observe(document, {}); }, |
| 63 throws); |
| 64 }, expectation); |
| 65 }); |
| 66 |
| 67 test('direct-parallel options-named', () { |
| 68 expect(() { |
| 69 var container = new DivElement(); |
| 70 keepAlive.add(container); |
| 71 var div1 = new DivElement(); |
| 72 var div2 = new DivElement(); |
| 73 var mutationObserver = new MutationObserver( |
| 74 mutationCallback(2, orderedEquals([div1, div2]))); |
| 75 mutationObserver.observe(container, childList: true); |
| 76 |
| 77 container.append(div1); |
| 78 container.append(div2); |
| 79 }, expectation); |
| 80 }); |
| 81 |
| 82 test('direct-nested options-named', () { |
| 83 expect(() { |
| 84 var container = new DivElement(); |
| 85 keepAlive.add(container); |
| 86 var div1 = new DivElement(); |
| 87 var div2 = new DivElement(); |
| 88 var mutationObserver = |
| 89 new MutationObserver(mutationCallback(1, orderedEquals([div1]))); |
| 90 mutationObserver.observe(container, childList: true); |
| 91 |
| 92 container.append(div1); |
| 93 div1.append(div2); |
| 94 }, expectation); |
| 95 }); |
| 96 |
| 97 test('subtree options-named', () { |
| 98 expect(() { |
| 99 var container = new DivElement(); |
| 100 keepAlive.add(container); |
| 101 var div1 = new DivElement(); |
| 102 var div2 = new DivElement(); |
| 103 var mutationObserver = new MutationObserver( |
| 104 mutationCallback(2, orderedEquals([div1, div2]))); |
| 105 mutationObserver.observe(container, childList: true, subtree: true); |
| 106 |
| 107 container.append(div1); |
| 108 div1.append(div2); |
| 109 }, expectation); |
| 110 }); |
| 111 }); |
| 112 } |
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