| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>LongTask Timing: long task in nested child iframe</title> |
| <body> |
| |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| |
| <h1>Long Task in Nested Child Iframe</h1> |
| <div id="log"></div> |
| <script> |
| async_test(function (t) { |
| var observer = new PerformanceObserver( |
| t.step_func(function (entryList) { |
| var entries = entryList.getEntries(); |
| assert_equals(entries.length, 1, |
| "Exactly one entry is expected."); |
| var longtask = entries[0]; |
| assert_equals(longtask.entryType, "longtask"); |
| assert_equals(longtask.name, "same-origin-descendant"); |
| assert_greater_than(longtask.duration, 50); |
| assert_equals(longtask.startTime, Math.floor(longtask.startTime), |
| "startTime expected to have 1 millisecond granularity"); |
| |
| // Assert the TaskAttributionTiming entry in attribution. |
| assert_equals(longtask.attribution.length, 1, |
| "Exactly one attribution entry is expected"); |
| var attribution = longtask.attribution[0]; |
| assert_equals(attribution.entryType, "taskattribution"); |
| assert_equals(attribution.name, "frame"); |
| assert_equals(attribution.duration, 0); |
| assert_equals(attribution.startTime, 0); |
| assert_equals(attribution.frameId, "child-iframe-id"); |
| assert_equals(attribution.frameName, "child-iframe-name"); |
| assert_equals(attribution.frameSrc, "resources/subframe-with-longtask.html"); |
| observer.disconnect(); |
| t.done(); |
| }) |
| ); |
| observer.observe({entryTypes: ["longtask"]}); |
| |
| }, "Performance longtask entries in child iframe are observable in parent"); |
| |
| </script> |
| |
| <iframe src="resources/subframe-with-longtask.html" id="child-iframe-id" name="child-iframe-name"></iframe> |
| |
| </body> |
