| <!DOCTYPE HTML> |
| <meta charset=utf-8> |
| <title>Event Timing: toJSON</title> |
| <body> |
| <script src=/resources/testharness.js></script> |
| <script src=/resources/testharnessreport.js></script> |
| <script src=/resources/testdriver.js></script> |
| <script src=/resources/testdriver-vendor.js></script> |
| <script src=resources/event-timing-test-utils.js></script> |
| <button id='button'>Generate a 'click' event</button> |
| <script> |
| async_test(function (t) { |
| assert_implements(window.PerformanceEventTiming, 'Event Timing is not supported.'); |
| const observer = new PerformanceObserver( |
| t.step_func_done(function(entryList) { |
| const entry = entryList.getEntries()[0]; |
| assert_equals(typeof(entry.toJSON), 'function'); |
| const json = entry.toJSON(); |
| assert_equals(typeof(json), 'object'); |
| const keys = [ |
| // PerformanceEntry |
| 'name', |
| 'entryType', |
| 'startTime', |
| 'duration', |
| // PerformanceEventTiming |
| 'processingStart', |
| 'processingEnd', |
| 'cancelable', |
| ]; |
| for (const key of keys) { |
| assert_equals(json[key], entry[key], |
| 'PerformanceEventTiming ${key} entry does not match its toJSON value'); |
| } |
| assert_equals(json['target'], undefined, 'toJSON should not include target'); |
| }) |
| ); |
| observer.observe({type: 'event'}); |
| clickAndBlockMain('button'); |
| }, 'Test toJSON() in PerformanceEventTiming.'); |
| </script> |
| </body> |