| <!doctype html> |
| <script src="../resources/testharness.js"></script> |
| <script src="../resources/testharnessreport.js"></script> |
| <script src="./resources/resizeTestHelper.js"></script> |
| <p>ResizeObserver tests</p> |
| <div id="target1" style="width:100px;height:100px;">t1</div> |
| <div id="target2" style="width:100px;height:100px;">t2</div> |
| <img id="target3" style="width:100px;height:100px;"> |
| <iframe src="./resources/iframe.html" width="300px" height="100px" style="display:block"></iframe> |
| <script> |
| 'use strict'; |
| |
| var helper = new ResizeTestHelper(); |
| |
| let t1 = document.querySelector('#target1'); |
| let t2 = document.querySelector('#target2'); |
| |
| // allow uncaught exception because ResizeObserver posts exceptions |
| // to window error handler when limit is exceeded. |
| setup({allow_uncaught_exception: true}); |
| |
| function test0() { |
| helper.createTest( |
| "simple observation", |
| _ => { |
| helper.observer.disconnect(); |
| helper.observer.observe(t1); |
| t1.style.width = "5px"; |
| }, |
| entries => { |
| assert_equals(entries.length, 1, "1 pending notification"); |
| assert_equals(entries[0].target, t1, "target is t1"); |
| assert_equals(entries[0].contentRect.width, 5, "target width"); |
| test1(); |
| } |
| ); |
| helper.nextTest(); |
| } |
| |
| function test1() { |
| helper.createTest( |
| "multiple observation on same element trigger only one", |
| _ => { |
| helper.observer.observe(t1); |
| helper.observer.observe(t1); |
| t1.style.width = "10px"; |
| }, |
| entries => { |
| assert_equals(entries.length, 1, "1 pending notification"); |
| helper.observer.disconnect(); |
| test2(); |
| } |
| ); |
| helper.nextTestRaf(); |
| } |
| |
| function test2() { |
| test(_ => { |
| assert_throws(null, _=> { |
| helper.observer.observe({}); |
| }); |
| test3(); |
| }, |
| "throw exception when observing non-element" |
| ); |
| } |
| |
| function test3() { |
| helper.createTest( |
| "disconnect stops all notifications", |
| setup => { |
| helper.observer.observe(t1); |
| helper.observer.observe(t2); |
| helper.observer.disconnect(); |
| t1.style.width = "30px"; |
| }, |
| entries => { |
| assert_unreached("no entries should happen"); |
| }, |
| timeout => { |
| // timeout happened, all is well. |
| test4(); |
| } |
| ); |
| helper.nextTestRaf(); |
| } |
| |
| function test4() { |
| helper.createTest( |
| "unobserve target stops notifications, unobserve non-observed does nothing", |
| setup => { |
| helper.observer.observe(t1); |
| helper.observer.observe(t2); |
| helper.observer.unobserve(t1); |
| helper.observer.unobserve(document.body); |
| t1.style.width = "40px"; |
| t2.style.width = "40px"; |
| }, |
| entries => { |
| assert_equals(entries.length, 1, "only t2"); |
| assert_equals(entries[0].target, t2, "t2 was observed"); |
| helper.observer.disconnect(); |
| test5(); |
| } |
| ); |
| helper.nextTestRaf(); |
| } |
| |
| function test5() { |
| let t4 = document.querySelector('#target3'); |
| helper.createTest( |
| "observe img", |
| setup => { |
| helper.observer.observe(t4); |
| }, |
| entries => { |
| helper.nextTest(); |
| } |
| ); |
| helper.createTest( |
| "observe img, part 2", |
| setup => { |
| t4.style.width = "100.5px"; |
| }, |
| entries => { |
| assert_equals(entries.length, 1); |
| assert_equals(entries[0].contentRect.width, 100.5); |
| helper.observer.disconnect(); |
| test6(); |
| } |
| ); |
| helper.nextTestRaf(); |
| } |
| |
| function test6() { |
| let test = async_test('iframe notifications'); |
| let testRequested = false; |
| let iframe = document.querySelector('iframe'); |
| window.addEventListener('message', event => { |
| switch(event.data) { |
| case 'readyToTest': |
| if (!testRequested) { |
| iframe.contentWindow.postMessage('startTest', '*'); |
| testRequested = true; |
| } |
| break; |
| case 'success': |
| case 'fail': |
| test.step( () => { |
| assert_equals(event.data, 'success'); |
| test.done(); |
| }); |
| break; |
| } |
| }, false); |
| } |
| |
| test0(); |
| |
| </script> |
