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| (Empty) | |
| 1 <!doctype html> |
| 2 <head> |
| 3 <script src="../resources/testharness.js"></script> |
| 4 <script src="../resources/testharnessreport.js"></script> |
| 5 <script src="./resources/resizeTestHelper.js"></script> |
| 6 </head> |
| 7 <p>ResizeObserver tests</p> |
| 8 <div id="target1" style="width:100px;height:100px;">t1</div> |
| 9 <div id="target2" style="width:100px;height:100px;">t2</div> |
| 10 <script> |
| 11 'use strict'; |
| 12 |
| 13 var helper = new ResizeTestHelper(); |
| 14 |
| 15 let t1 = document.querySelector('#target1'); |
| 16 let t2 = document.querySelector('#target2'); |
| 17 |
| 18 function test0() { |
| 19 helper.createTest( |
| 20 "simple observation", |
| 21 _ => { |
| 22 helper.observer.disconnect(); |
| 23 helper.observer.observe(t1); |
| 24 t1.style.width = "5px"; |
| 25 }, |
| 26 entries => { |
| 27 assert_equals(entries.length, 1, "1 pending notification"); |
| 28 assert_equals(entries[0].target, t1, "target is t1"); |
| 29 assert_equals(entries[0].contentRect.width, 5, "target width"); |
| 30 test1(); |
| 31 } |
| 32 ); |
| 33 } |
| 34 |
| 35 function test1() { |
| 36 helper.createTest( |
| 37 "multiple observation on same element trigger only one", |
| 38 _ => { |
| 39 helper.observer.disconnect(); |
| 40 helper.observer.observe(t1); |
| 41 helper.observer.observe(t1); |
| 42 t1.style.width = "10px"; |
| 43 }, |
| 44 entries => { |
| 45 assert_equals(entries.length, 1, "1 pending notification"); |
| 46 test2(); |
| 47 } |
| 48 ); |
| 49 } |
| 50 |
| 51 function test2() { |
| 52 test(_ => { |
| 53 assert_throws(null, _=> { |
| 54 helper.observer.observe({}); |
| 55 }); |
| 56 test3(); |
| 57 }, |
| 58 "throw exception when observing non-element" |
| 59 ); |
| 60 } |
| 61 |
| 62 function test3() { |
| 63 helper.createTest( |
| 64 "disconnect stops all notifications", |
| 65 _ => { |
| 66 helper.observer.observe(t1); |
| 67 helper.observer.observe(t2); |
| 68 helper.observer.disconnect(); |
| 69 t1.style.width = "30px"; |
| 70 }, |
| 71 entries => { |
| 72 assert_unreached("no entries should happen"); |
| 73 }, |
| 74 _ => { |
| 75 // timeout happened, all is well. |
| 76 test4(); |
| 77 } |
| 78 ); |
| 79 } |
| 80 |
| 81 function test4() { |
| 82 helper.createTest( |
| 83 "unobserve target stops notifications, unobserve non-observed does nothing", |
| 84 _ => { |
| 85 helper.observer.disconnect(); |
| 86 helper.observer.observe(t1); |
| 87 helper.observer.observe(t2); |
| 88 helper.observer.unobserve(t1); |
| 89 helper.observer.unobserve(document.body); |
| 90 t1.style.width = "40px"; |
| 91 t2.style.width = "40px"; |
| 92 }, |
| 93 entries => { |
| 94 assert_equals(entries.length, 1, "only t2"); |
| 95 assert_equals(entries[0].target, t2, "t2 was observed"); |
| 96 } |
| 97 ); |
| 98 } |
| 99 |
| 100 test0(); |
| 101 helper.startTests(); |
| 102 |
| 103 </script> |
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Chromium Code Reviews
Issue 2005593002:
Initial ResizeObserver implementation (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master