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polymer/test/unit/polymer-dom-observeNodes.html

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<!doctype html>
<!--
@license
Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
Code distributed by Google as part of the polymer project is also
subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
-->
<html>
<head>
<meta charset="utf-8">
<script src="../../../webcomponentsjs/webcomponents-lite.js"></script>
<script src="../../../web-component-tester/browser.js"></script>
<link rel="import" href="../../polymer.html">
</head>
<body>
<dom-module id='test-static'>
<template>
<div>static</div>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-static'
});
});
</script>
</dom-module>
<dom-module id='test-content'>
<template>
<span id="contentContainer">[<content id="content"></content>]</span>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content'
});
});
</script>
</dom-module>
<dom-module id='test-content1'>
<template>
<test-content id="content"><content></content></test-content>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content1'
});
});
</script>
</dom-module>
<dom-module id='test-content2'>
<template>
<test-content1 id="content"><content></content></test-content1>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content2'
});
});
</script>
</dom-module>
<dom-module id='test-content3'>
<template>
<test-content2 id="content"><content></content></test-content2>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content3'
});
});
</script>
</dom-module>
<dom-module id='test-content-raw'>
<template>
<div id="content"><content></content></div>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content-raw'
});
});
</script>
</dom-module>
<dom-module id='test-content-attr'>
<template>
[<content id="content" select="[d]"></content>]
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content-attr'
});
});
</script>
</dom-module>
<dom-module id='test-content-attr1'>
<template>
<test-content-attr id="content"><content select="[c]"></content></test-content-attr>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content-attr1'
});
});
</script>
</dom-module>
<dom-module id='test-content-attr2'>
<template>
<test-content-attr1 id="content"><content select="[b]"></content></test-content-attr1>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content-attr2'
});
});
</script>
</dom-module>
<dom-module id='test-content-attr3'>
<template>
<test-content-attr2 id="content"><content select="[a]"></content></test-content-attr2>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content-attr3'
});
});
</script>
</dom-module>
<dom-module id='test-content-attr-inside'>
<template>
<test-content-attr3 id="content"><content></content></test-content-attr3>
</template>
<script>
HTMLImports.whenReady(function() {
Polymer({
is:'test-content-attr-inside'
});
});
</script>
</dom-module>
<test-content><div>A</div><div>B</div></test-content>
<test-static><div>static A</div><div>static B</div></test-static>
<div id="staticDiv"></div>
<script>
suite('observeNodes', function() {
test('observe intial state of distributing element', function() {
var recordedA;
var el = document.querySelector('test-content');
Polymer.dom(el).observeNodes(function(info) {
recordedA = info;
});
Polymer.dom.flush();
assert.equal(recordedA.addedNodes.length, 2);
recordedA = null;
var recordedB;
Polymer.dom(el).observeNodes(function(info) {
recordedB = info;
});
Polymer.dom.flush();
assert.equal(recordedA, null);
assert.equal(recordedB.addedNodes.length, 2);
});
test('observe intial state of non-distributing element', function() {
var recordedA;
var el = document.querySelector('test-static');
Polymer.dom(el).observeNodes(function(info) {
recordedA = info;
});
Polymer.dom.flush();
assert.equal(recordedA.addedNodes.length, 2);
recordedA = null;
var recordedB;
Polymer.dom(el).observeNodes(function(info) {
recordedB = info;
});
Polymer.dom.flush();
assert.equal(recordedA, null);
assert.equal(recordedB.addedNodes.length, 2);
});
test('observe children changes to distributing element', function() {
var el = document.createElement('test-content');
document.body.appendChild(el);
var recorded;
var handle = Polymer.dom(el).observeNodes(function(info) {
recorded = info;
});
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 2);
assert.equal(recorded.removedNodes[0], d);
assert.equal(recorded.removedNodes[1], d1);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// reset, unobserve and remove
recorded = null;
Polymer.dom(el).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded, null);
document.body.removeChild(el);
});
test('observe children changes to distributing element that provoke additional changes', function() {
var el = document.createElement('test-content');
document.body.appendChild(el);
var recordedInfo, elAddedInObserver;
var observerCallCount = 0;
var handle = Polymer.dom(el).observeNodes(function(info) {
if (Polymer.dom(info.target).childNodes.length < 5) {
elAddedInObserver = document.createElement('div');
Polymer.dom(info.target).appendChild(elAddedInObserver);
}
observerCallCount++;
recordedInfo = info;
});
// add
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(observerCallCount, 5);
assert.equal(recordedInfo.addedNodes.length, 1);
assert.equal(recordedInfo.addedNodes[0], elAddedInObserver);
assert.equal(Polymer.dom(el).childNodes.length, 5);
document.body.removeChild(el);
});
test('observe children changes to distributing element (async)', function(done) {
var el = document.createElement('test-content');
document.body.appendChild(el);
var nodes = [];
var handle = Polymer.dom(el).observeNodes(function(info) {
for (var i=0, at; i < info.removedNodes.length; i++) {
at = nodes.indexOf(info.removedNodes[i]);
assert.isAbove(at, -1);
nodes.splice(at, 1);
}
nodes = nodes.concat(info.addedNodes);
});
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
setTimeout(function() {
assert.sameMembers(el.getEffectiveChildNodes(), nodes);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
setTimeout(function() {
assert.sameMembers(el.getEffectiveChildNodes(), nodes);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
setTimeout(function() {
assert.sameMembers(el.getEffectiveChildNodes(), nodes);
Polymer.dom(el).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
setTimeout(function() {
assert.notEqual(nodes.length, el.getEffectiveChildNodes().length)
document.body.removeChild(el);
done();
});
});
});
});
});
test('observe children changes to non-distributing element', function() {
var el = document.createElement('test-static');
document.body.appendChild(el);
var recorded;
var handle = Polymer.dom(el).observeNodes(function(info) {
recorded = info;
});
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 2);
assert.equal(recorded.removedNodes[0], d);
assert.equal(recorded.removedNodes[1], d1);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// reset, unobserve and remove
recorded = null;
Polymer.dom(el).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded, null);
document.body.removeChild(el);
});
test('observe changes to inner node wrapping <content>', function() {
var el = document.createElement('test-content');
document.body.appendChild(el);
var observedInfo;
var handle = Polymer.dom(el.$.contentContainer).observeNodes(function(info) {
observedInfo = info;
});
Polymer.dom.flush();
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(observedInfo.target, el.$.contentContainer);
assert.equal(observedInfo.addedNodes.length, 2);
assert.equal(observedInfo.removedNodes.length, 0);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(observedInfo.addedNodes.length, 0);
assert.equal(observedInfo.removedNodes.length, 2);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(observedInfo.addedNodes.length, 2);
assert.equal(observedInfo.removedNodes.length, 0);
// reset, unobserve and remove
observedInfo = null;
Polymer.dom(el.$.contentContainer).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(observedInfo, null);
document.body.removeChild(el);
});
test('observe changes to <content>', function() {
var el = document.createElement('test-content');
document.body.appendChild(el);
var observedInfo;
var handle = Polymer.dom(el.$.content).observeNodes(function(info) {
observedInfo = info;
});
Polymer.dom.flush();
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(observedInfo.target, el.$.content);
assert.equal(observedInfo.addedNodes.length, 2);
assert.equal(observedInfo.removedNodes.length, 0);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(observedInfo.addedNodes.length, 0);
assert.equal(observedInfo.removedNodes.length, 2);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(observedInfo.addedNodes.length, 2);
assert.equal(observedInfo.removedNodes.length, 0);
// reset, unobserve and remove
observedInfo = null;
Polymer.dom(el.$.content).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(observedInfo, null);
document.body.removeChild(el);
});
test('observe effective children inside distributing element', function() {
var el = document.createElement('test-content1');
document.body.appendChild(el);
var recorded;
var handle = Polymer.dom(el.$.content).observeNodes(function(info) {
recorded = info;
});
Polymer.dom.flush();
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 2);
assert.equal(recorded.removedNodes[0], d);
assert.equal(recorded.removedNodes[1], d1);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// reset, unobserve and remove
recorded = null;
Polymer.dom(el.$.content).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded, null);
document.body.removeChild(el);
});
test('observe effective children changes when adding to another host', function() {
var el = document.createElement('test-content1');
document.body.appendChild(el);
var recorded;
var handle = Polymer.dom(el.$.content).observeNodes(function(info) {
recorded = info;
});
Polymer.dom.flush();
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// add somewhere else... we should see these as removes
Polymer.dom(document.body).appendChild(d);
Polymer.dom(document.body).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 2);
assert.equal(recorded.removedNodes[0], d);
assert.equal(recorded.removedNodes[1], d1);
// cleanup
Polymer.dom(document.body).removeChild(d);
Polymer.dom(document.body).removeChild(d1);
document.body.removeChild(el);
});
test('observe effective children changes in static content when adding to another host', function() {
var el = document.createElement('staticDiv');
document.body.appendChild(el);
var recorded;
var handle = Polymer.dom(el).observeNodes(function(info) {
recorded = info;
});
Polymer.dom.flush();
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// add somewhere else... we should see these as removes
Polymer.dom(document.body).appendChild(d);
Polymer.dom(document.body).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 2);
assert.equal(recorded.removedNodes[0], d);
assert.equal(recorded.removedNodes[1], d1);
// cleanup
Polymer.dom(document.body).removeChild(d);
Polymer.dom(document.body).removeChild(d1);
document.body.removeChild(el);
});
test('observe effective children inside deep distributing element', function() {
var el = document.createElement('test-content3');
document.body.appendChild(el);
var recorded;
var content = el.$.content.$.content.$.content;
var handle = Polymer.dom(content).observeNodes(function(info) {
recorded = info;
});
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 2);
assert.equal(recorded.removedNodes[0], d);
assert.equal(recorded.removedNodes[1], d1);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// reset, unobserve and remove
recorded = null;
Polymer.dom(content).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded, null);
document.body.removeChild(el);
});
test('observe <content> inside deep distributing element', function() {
var el = document.createElement('test-content3');
document.body.appendChild(el);
var recorded;
var content = el.$.content.$.content.$.content.$.content;
assert.equal(content.localName, 'content');
var handle = Polymer.dom(content).observeNodes(function(info) {
recorded = info;
});
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 2);
assert.equal(recorded.removedNodes[0], d);
assert.equal(recorded.removedNodes[1], d1);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// reset, unobserve and remove
recorded = null;
Polymer.dom(content).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
Polymer.dom.flush();
assert.equal(recorded, null);
document.body.removeChild(el);
});
test('observe effective children inside deep distributing element (async)', function(done) {
var el = document.createElement('test-content3');
document.body.appendChild(el);
var recorded;
var content = el.$.content.$.content.$.content;
var handle = Polymer.dom(content).observeNodes(function(info) {
recorded = info;
});
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
setTimeout(function() {
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// remove
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
setTimeout(function() {
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 2);
assert.equal(recorded.removedNodes[0], d);
assert.equal(recorded.removedNodes[1], d1);
// add
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
setTimeout(function() {
assert.equal(recorded.addedNodes.length, 2);
assert.equal(recorded.addedNodes[0], d);
assert.equal(recorded.addedNodes[1], d1);
// reset, unobserve and remove
recorded = null;
Polymer.dom(content).unobserveNodes(handle);
Polymer.dom(el).removeChild(d);
Polymer.dom(el).removeChild(d1);
setTimeout(function() {
assert.equal(recorded, null);
document.body.removeChild(el);
done();
});
});
});
});
});
test('observe effective children attr changes inside deep distributing element (async)', function(done) {
var el = document.createElement('test-content-attr3');
document.body.appendChild(el);
var recorded;
var content = el.$.content.$.content.$.content;
var handle = Polymer.dom(content).observeNodes(function(info) {
recorded = info;
}, {attributes: true});
Polymer.dom.flush();
recorded = null;
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded, null);
Polymer.dom(d).setAttribute('a', '');
Polymer.dom(d).setAttribute('b', '');
setTimeout(function() {
assert.equal(recorded, null);
Polymer.dom(d).setAttribute('c', '');
setTimeout(function() {
assert.equal(recorded.addedNodes.length, 1);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
Polymer.dom(d).removeAttribute('c');
setTimeout(function() {
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 1);
assert.equal(recorded.removedNodes[0], d);
recorded = null;
Polymer.dom(content).unobserveNodes(handle);
Polymer.dom(d).setAttribute('c', '');
setTimeout(function() {
assert.equal(recorded, null);
document.body.removeChild(el);
done();
});
});
});
});
});
test('observe effective children attr changes inside deep distributing element without outer select (async)', function(done) {
var el = document.createElement('test-content-attr-inside');
document.body.appendChild(el);
var recorded;
var content = el.$.content.$.content.$.content.$.content;
var handle = Polymer.dom(content).observeNodes(function(info) {
recorded = info;
}, {attributes: true});
Polymer.dom.flush();
recorded = null;
// add
var d = document.createElement('div');
var d1 = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom(el).appendChild(d1);
Polymer.dom.flush();
assert.equal(recorded, null);
Polymer.dom(d).setAttribute('a', '');
Polymer.dom(d).setAttribute('b', '');
setTimeout(function() {
assert.equal(recorded, null);
Polymer.dom(d).setAttribute('c', '');
setTimeout(function() {
assert.equal(recorded.addedNodes.length, 1);
assert.equal(recorded.removedNodes.length, 0);
assert.equal(recorded.addedNodes[0], d);
Polymer.dom(d).removeAttribute('c');
setTimeout(function() {
assert.equal(recorded.addedNodes.length, 0);
assert.equal(recorded.removedNodes.length, 1);
assert.equal(recorded.removedNodes[0], d);
recorded = null;
Polymer.dom(content).unobserveNodes(handle);
Polymer.dom(d).setAttribute('c', '');
setTimeout(function() {
assert.equal(recorded, null);
document.body.removeChild(el);
done();
});
});
});
});
});
test('add/remove multiple observers', function() {
var el = document.createElement('test-content1');
document.body.appendChild(el);
var r1 = 0;
var h1 = Polymer.dom(el.$.content).observeNodes(function(info) {
r1++;
});
var r2 = 0;
var h2 = Polymer.dom(el.$.content).observeNodes(function(info) {
r2++;
});
var r3 = 0;
var h3 = Polymer.dom(el.$.content).observeNodes(function(info) {
r3++;
});
// add
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(r1, 1);
assert.equal(r2, 1);
assert.equal(r3, 1);
Polymer.dom(el.$.content).unobserveNodes(h1);
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(r1, 1);
assert.equal(r2, 2);
assert.equal(r3, 2);
Polymer.dom(el.$.content).unobserveNodes(h2);
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(r1, 1);
assert.equal(r2, 2);
assert.equal(r3, 3);
Polymer.dom(el.$.content).unobserveNodes(h3);
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(r1, 1);
assert.equal(r2, 2);
assert.equal(r3, 3);
h1 = Polymer.dom(el.$.content).observeNodes(h1.fn);
h2 = Polymer.dom(el.$.content).observeNodes(h2.fn);
h3 = Polymer.dom(el.$.content).observeNodes(h3.fn);
Polymer.dom.flush();
assert.equal(r1, 2);
assert.equal(r2, 3);
assert.equal(r3, 4);
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(r1, 3);
assert.equal(r2, 4);
assert.equal(r3, 5);
Polymer.dom(el.$.content).unobserveNodes(h3);
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(r1, 4);
assert.equal(r2, 5);
assert.equal(r3, 5);
Polymer.dom(el.$.content).unobserveNodes(h2);
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(r1, 5);
assert.equal(r2, 5);
assert.equal(r3, 5);
Polymer.dom(el.$.content).unobserveNodes(h1);
var d = document.createElement('div');
Polymer.dom(el).appendChild(d);
Polymer.dom.flush();
assert.equal(r1, 5);
assert.equal(r2, 5);
assert.equal(r3, 5);
});
});
</script>
</body>
</html>