blob: 559f52ad2b3a60a968866172778cef861062ed48 [file] [log] [blame]
<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./resources/resizeTestHelper.js"></script>
<style>
div {
border: 1px dotted gray
}
</style>
<p>ResizeObserver notification event loop tests</p>
<div id="target1" style="width:100px;height:100px;">t1
</div>
<div id="container">
<div id="a1" style="width:100px;height:100px">
<div id="a2" style="width:100px;height:100px">
</div>
</div>
<div id="b1" style="width:100px;height:100px">
<div id="b2" style="width:100px;height:100px">
</div>
</div>
</div>
<script>
'use strict';
let t1 = document.querySelector('#target1');
// allow uncaught exception because ResizeObserver posts exceptions
// to window error handler when limit is exceeded.
// This codepath is tested in this file.
setup({allow_uncaught_exception: true});
function template() {
let helper = new ResizeTestHelper(
"test0: title",
[
{
setup: observer => {
},
notify: (entries, observer) => {
return true; // Delay next step
}
}
]);
return helper.start();
}
var onErrorCalled = false;
window.onerror = err => {
onErrorCalled = true;
}
function test0() {
let divs = [t1];
let rAF = 0;
let helper = new ResizeTestHelper(
"test0: multiple notifications inside same event loop",
[
{
setup: observer => {
onErrorCalled = false;
let t2 = document.createElement('div');
let t3 = document.createElement('div');
t2.appendChild(t3);
t1.appendChild(t2);
divs.push(t2);
divs.push(t3);
observer.observe(t1);
observer.observe(t2);
observer.observe(t3);
},
notify: (entries, observer) => {
assert_equals(entries.length, 3, "3 notifications");
}
},
{
setup: observer => {
helper.startCountingRaf();
divs.forEach( el => { el.style.width = "101px";});
},
notify: (entries, observer) => {
// t1 is not delivered
assert_equals(entries.length, 2, "2 notifications");
assert_equals(helper.rafCount, 0, "still in same loop");
}
},
{
setup: observer => {
divs.forEach( el => { el.style.width = "102px";});
},
notify: (entries, observer) => {
assert_equals(entries.length, 1, "1 notifications");
assert_equals(helper.rafCount, 0, "same loop");
}
},
{ // t1 and t2 get notified
setup: observer => {
},
notify: (entries, observer) => {
assert_equals(entries.length, 2, "2 notifications");
assert_equals(helper.rafCount, 1, "new loop");
assert_equals(onErrorCalled, true, "error was fired");
observer.disconnect();
while (t1.childNodes.length > 0)
t1.removeChild(t1.childNodes[0]);
}
}
]);
return helper.start();
}
function test1() {
var resizers = [t1];
// Testing depths of shadow roots
// DOM: t1 <- t2 <- t3 <-shadow- t4 <- t5
let helper = new ResizeTestHelper(
"test1: depths of shadow roots",
[
{
setup: observer => {
onErrorCalled = false;
let t2 = document.createElement('div');
t1.appendChild(t2);
resizers.push(t2);
let t3 = document.createElement('div');
resizers.push(t3);
t2.appendChild(t3);
let shadow = t3.attachShadow({ mode: "open" });
let t4 = document.createElement('div');
resizers.push(t4);
shadow.appendChild(t4);
let t5 = document.createElement('div');
resizers.push(t5);
t4.appendChild(t5);
resizers.forEach( el => observer.observe(el) );
},
notify: (entries, observer) => {
assert_equals(entries.length, 5, "all entries resized");
}
},
{
setup: observer => {
resizers.forEach( el => el.style.width = "111px" );
},
notify: (entries, observer) => {
assert_equals(entries.length, 4, "depth limited");
}
},
{
setup: observer => {
resizers.forEach( el => el.style.width = "112px" );
},
notify: (entries, observer) => {
assert_equals(entries.length, 3, "depth limited");
}
},
{
setup: observer => {
resizers.forEach( el => el.style.width = "113px" );
},
notify: (entries, observer) => {
assert_equals(entries.length, 2, "depth limited");
}
},
{
setup: observer => {
resizers.forEach( el => el.style.width = "114px" );
},
notify: (entries, observer) => {
assert_equals(entries.length, 1, "depth limited");
}
},
{
setup: observer => {
},
notify: (entries, observer) => {
assert_equals(entries.length, 4, "limit notifications");
assert_equals(onErrorCalled, true, "breached limit");
observer.disconnect();
t1.removeChild(t1.firstChild);
}
},
]);
return helper.start();
}
function test2() {
let container = document.querySelector('#container');
let a1 = document.querySelector('#a1');
let a2 = document.querySelector('#a2');
let b1 = document.querySelector('#b1');
let b2 = document.querySelector('#b2');
let targets = [a1, a2, b1, b2];
let helper = new ResizeTestHelper(
"test2: move target in dom while inside event loop",
[
{
setup: observer => {
for (let t of targets)
observer.observe(t);
},
notify: (entries, observer) => {
return true; // delay next observation
}
},
{ // resize them all
setup: observer => {
for (let t of targets)
t.style.width = "110px";
},
notify: (entries, observer) => {
assert_equals(entries.length, targets.length, "all targets observed");
}
},
{ // resize all, move dom upwards
setup: observer => {
for (let t of targets)
t.style.width = "130px";
container.appendChild(b2);
},
notify: (entries, observer) => {
assert_equals(entries.length, 1, "b2 moved upwards");
assert_equals(entries[0].target, a2);
}
},
{ // resize all, move dom downwards
setup: observer => {
for (let t of targets)
t.style.width = "130px";
a2.appendChild(b2);
},
notify: (entries, observer) => {
assert_equals(entries.length, 1, "b2 moved downwards");
assert_equals(entries[0].target, b2);
a1.appendChild(a2);
}
},
]);
return helper.start();
}
let guard;
test(_ => {
assert_own_property(window, "ResizeObserver");
guard = async_test('guard');
}, "ResizeObserver implemented")
test0()
.then(() => { return test1(); })
.then(() => { return test2(); })
.then(() => { guard.done(); });
</script>