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// 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.
library mutationobserver_test;
import 'package:unittest/unittest.dart';
import 'package:unittest/html_individual_config.dart';
import 'dart:html';
// Due to https://code.google.com/p/chromium/issues/detail?id=329103
// mutationObservers sometimes do not fire if the node being observed is GCed
// so we keep around references to all nodes we have created mutation
// observers for.
var keepAlive = [];
/**
* Test suite for Mutation Observers. This is just a small set of sanity
* checks, not a complete test suite.
*/
main() {
useHtmlIndividualConfiguration();
group('supported', () {
test('supported', () {
expect(MutationObserver.supported, true);
});
});
var expectation = MutationObserver.supported ? returnsNormally : throws;
group('childList', () {
mutationCallback(count, expectation) {
var done = false;
var nodes = [];
callback(mutations, observer) {
for (MutationRecord mutation in mutations) {
for (Node node in mutation.addedNodes) {
nodes.add(node);
}
}
if (nodes.length >= count) {
done = true;
expect(nodes.length, count);
expect(nodes, expectation);
}
}
// If it's not supported, don't block waiting for it.
if (!MutationObserver.supported) {
return () => done;
}
return expectAsyncUntil(callback, () => done);
}
test('empty options is syntax error', () {
expect(() {
var mutationObserver = new MutationObserver(
(mutations, observer) { expect(false, isTrue,
reason: 'Should not be reached'); });
expect(() { mutationObserver.observe(document, {}); },
throws);
}, expectation);
});
test('direct-parallel options-named', () {
expect(() {
var container = new DivElement();
keepAlive.add(container);
var div1 = new DivElement();
var div2 = new DivElement();
var mutationObserver = new MutationObserver(
mutationCallback(2, orderedEquals([div1, div2])));
mutationObserver.observe(container, childList: true);
container.append(div1);
container.append(div2);
}, expectation);
});
test('direct-nested options-named', () {
expect(() {
var container = new DivElement();
keepAlive.add(container);
var div1 = new DivElement();
var div2 = new DivElement();
var mutationObserver =
new MutationObserver(mutationCallback(1, orderedEquals([div1])));
mutationObserver.observe(container, childList: true);
container.append(div1);
div1.append(div2);
}, expectation);
});
test('subtree options-named', () {
expect(() {
var container = new DivElement();
keepAlive.add(container);
var div1 = new DivElement();
var div2 = new DivElement();
var mutationObserver = new MutationObserver(
mutationCallback(2, orderedEquals([div1, div2])));
mutationObserver.observe(container, childList: true, subtree: true);
container.append(div1);
div1.append(div2);
}, expectation);
});
});
}