зеркало из https://github.com/mozilla/gecko-dev.git
410 строки
11 KiB
HTML
410 строки
11 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=1499961
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Some tests ported from IntersectionObserver/polyfill/intersection-observer-test.html
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Original license header:
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Copyright 2016 Google Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<head>
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<meta charset="utf-8">
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<title>Test for Bug 1499961</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body onload="onLoad()">
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1499961">Mozilla Bug 1499961</a>
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<p id="display"></p>
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<pre id="test">
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<script type="application/javascript">
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/* eslint-disable no-shadow */
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var tests = [];
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var curDescribeMsg = '';
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var curItMsg = '';
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function beforeEach_fn() { };
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function afterEach_fn() { };
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function before(fn) {
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fn();
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}
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function beforeEach(fn) {
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beforeEach_fn = fn;
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}
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function afterEach(fn) {
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afterEach_fn = fn;
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}
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function it(msg, fn) {
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tests.push({
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msg: `${msg} [${curDescribeMsg}]`,
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fn: fn
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});
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}
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var callbacks = [];
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function callDelayed(fn) {
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callbacks.push(fn);
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}
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requestAnimationFrame(function tick() {
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var i = callbacks.length;
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while (i--) {
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var cb = callbacks[i];
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SimpleTest.executeSoon(function() { SimpleTest.executeSoon(cb) });
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callbacks.splice(i, 1);
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}
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requestAnimationFrame(tick);
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});
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function expect(val) {
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return {
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to: {
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throwException: function (regexp) {
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try {
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val();
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ok(false, `${curItMsg} - an exception should have beeen thrown`);
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} catch (e) {
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ok(regexp.test(e), `${curItMsg} - supplied regexp should match thrown exception`);
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}
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},
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get be() {
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var fn = function (expected) {
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is(val, expected, curItMsg);
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};
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fn.ok = function () {
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ok(val, curItMsg);
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};
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fn.greaterThan = function (other) {
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ok(val > other, `${curItMsg} - ${val} should be greater than ${other}`);
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};
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fn.lessThan = function (other) {
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ok(val < other, `${curItMsg} - ${val} should be less than ${other}`);
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};
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return fn;
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},
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eql: function (expected) {
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if (Array.isArray(expected)) {
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if (!Array.isArray(val)) {
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ok(false, curItMsg, `${curItMsg} - should be an array,`);
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return;
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}
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is(val.length, expected.length, curItMsg, `${curItMsg} - arrays should be the same length`);
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if (expected.length != val.length) {
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return;
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}
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for (var i = 0; i < expected.length; i++) {
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is(val[i], expected[i], `${curItMsg} - array elements at position ${i} should be equal`);
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if (expected[i] != val[i]) {
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return;
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}
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}
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ok(true);
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}
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},
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}
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}
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}
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function describe(msg, fn) {
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curDescribeMsg = msg;
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fn();
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curDescribeMsg = '';
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}
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function next() {
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var test = tests.shift();
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if (test) {
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console.log(test.msg);
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curItMsg = test.msg;
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var fn = test.fn;
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beforeEach_fn();
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if (fn.length) {
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fn(function () {
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afterEach_fn();
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next();
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});
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} else {
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fn();
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afterEach_fn();
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next();
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}
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} else {
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SimpleTest.finish();
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}
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}
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var sinon = {
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spy: function () {
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var callbacks = [];
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var fn = function () {
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fn.callCount++;
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fn.lastCall = { args: arguments };
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if (callbacks.length) {
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callbacks.shift()();
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}
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};
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fn.callCount = 0;
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fn.lastCall = { args: [] };
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fn.waitForNotification = (fn) => {
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callbacks.push(fn);
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};
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return fn;
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}
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};
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var ASYNC_TIMEOUT = 300;
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var io;
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var noop = function() {};
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// References to DOM elements, which are accessible to any test
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// and reset prior to each test so state isn't shared.
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var rootEl;
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var grandParentEl;
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var parentEl;
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var targetEl1;
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var targetEl2;
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var targetEl3;
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var targetEl4;
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var targetEl5;
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describe('IntersectionObserver', function() {
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before(function() {
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});
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beforeEach(function() {
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addStyles();
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addFixtures();
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});
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afterEach(function() {
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if (io && 'disconnect' in io) io.disconnect();
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io = null;
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window.onmessage = null;
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removeStyles();
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removeFixtures();
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});
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describe('constructor', function() {
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it('move iframe and check reflow', function(done) {
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var spy = sinon.spy();
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io = new IntersectionObserver(spy, {root: rootEl});
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runSequence([
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// Do a first change and wait for its intersection observer
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// notification, to ensure one full reflow was completed.
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function(done) {
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targetEl1.style.top = '0px';
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io.observe(targetEl1);
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spy.waitForNotification(function() {
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var records = sortRecords(spy.lastCall.args[0]);
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expect(records.length).to.be(1);
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expect(records[0].target).to.be(targetEl1);
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done();
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});
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},
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// Do another change, which may trigger an incremental reflow only.
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function(done) {
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targetEl4.style.top = '-20px';
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targetEl4.style.left = '20px';
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io.observe(targetEl4);
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spy.waitForNotification(function() {
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expect(spy.callCount).to.be(2);
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var records = sortRecords(spy.lastCall.args[0]);
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expect(records.length).to.be(1);
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expect(records[0].target).to.be(targetEl4);
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// After the iframe is moved, reflow should include its parent,
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// even if the iframe is a reflow root.
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// If moved correctly (outside of rootEl), the intersection ratio
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// should now be 0.
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expect(records[0].intersectionRatio).to.be(0);
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done();
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});
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}
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], done);
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});
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});
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});
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/**
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* Runs a sequence of function and when finished invokes the done callback.
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* Each function in the sequence is invoked with its own done function and
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* it should call that function once it's complete.
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* @param {Array<Function>} functions An array of async functions.
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* @param {Function} done A final callback to be invoked once all function
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* have run.
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*/
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function runSequence(functions, done) {
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var next = functions.shift();
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if (next) {
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next(function() {
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runSequence(functions, done);
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});
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} else {
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done && done();
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}
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}
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/**
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* Sorts an array of records alphebetically by ascending ID. Since the current
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* native implementation doesn't sort change entries by `observe` order, we do
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* that ourselves for the non-polyfill case. Since all tests call observe
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* on targets in sequential order, this should always match.
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* https://crbug.com/613679
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* @param {Array<IntersectionObserverEntry>} entries The entries to sort.
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* @return {Array<IntersectionObserverEntry>} The sorted array.
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*/
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function sortRecords(entries) {
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entries = entries.sort(function(a, b) {
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return a.target.id < b.target.id ? -1 : 1;
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});
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return entries;
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}
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/**
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* Adds the common styles used by all tests to the page.
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*/
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function addStyles() {
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var styles = document.createElement('style');
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styles.id = 'styles';
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document.documentElement.appendChild(styles);
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var cssText =
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'#root {' +
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' position: relative;' +
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' width: 400px;' +
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' height: 200px;' +
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' background: #eee' +
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'}' +
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'#grand-parent {' +
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' position: relative;' +
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' width: 200px;' +
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' height: 200px;' +
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'}' +
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'#parent {' +
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' position: absolute;' +
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' top: 0px;' +
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' left: 200px;' +
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' overflow: hidden;' +
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' width: 200px;' +
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' height: 200px;' +
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' background: #ddd;' +
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'}' +
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'#target1, #target2, #target3, #target4 {' +
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' position: absolute;' +
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' top: 0px;' +
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' left: 0px;' +
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' width: 20px;' +
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' height: 20px;' +
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' transform: translateX(0px) translateY(0px);' +
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' transition: transform .5s;' +
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' background: #f00;' +
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' border: none;' +
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'}';
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styles.innerHTML = cssText;
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}
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/**
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* Adds the DOM fixtures used by all tests to the page and assigns them to
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* global variables so they can be referenced within the tests.
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*/
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function addFixtures() {
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var fixtures = document.createElement('div');
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fixtures.id = 'fixtures';
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fixtures.innerHTML =
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'<div id="root">' +
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' <div id="grand-parent">' +
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' <div id="parent">' +
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' <div id="target1"></div>' +
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' <div id="target2"></div>' +
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' <div id="target3"></div>' +
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' <iframe id="target4"></iframe>' +
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' </div>' +
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' </div>' +
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'</div>';
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document.body.appendChild(fixtures);
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rootEl = document.getElementById('root');
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grandParentEl = document.getElementById('grand-parent');
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parentEl = document.getElementById('parent');
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targetEl1 = document.getElementById('target1');
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targetEl2 = document.getElementById('target2');
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targetEl3 = document.getElementById('target3');
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targetEl4 = document.getElementById('target4');
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}
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/**
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* Removes the common styles from the page.
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*/
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function removeStyles() {
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var styles = document.getElementById('styles');
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styles.remove();
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}
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/**
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* Removes the DOM fixtures from the page and resets the global references.
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*/
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function removeFixtures() {
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var fixtures = document.getElementById('fixtures');
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fixtures.remove();
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rootEl = null;
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grandParentEl = null;
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parentEl = null;
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targetEl1 = null;
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targetEl2 = null;
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targetEl3 = null;
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targetEl4 = null;
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}
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function onLoad() {
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SpecialPowers.pushPrefEnv({"set": [["dom.IntersectionObserver.enabled", true]]}, next);
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}
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SimpleTest.waitForExplicitFinish();
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</script>
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</pre>
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<div id="log">
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</div>
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</body>
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</html>
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