| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <script src="../resources/js-test-pre.js"></script> |
| </head> |
| <body> |
| <script> |
| description("Test PerformanceObserver callback is a task, not a microtask."); |
| window.jsTestIsAsync = true; |
| |
| window.microtaskExecuted = false; |
| window.callbackCount = 0; |
| window.list = null; |
| |
| let observer = new PerformanceObserver((list) => { |
| window.list = list; |
| callbackCount++; |
| |
| testPassed("PerformanceObserver callback fired"); |
| |
| if (callbackCount === 1) { |
| shouldBeFalse(`microtaskExecuted`); |
| shouldBe(`list.getEntries().length`, `1`); |
| performance.mark("mark2"); |
| Promise.resolve().then(() => { |
| testPassed("Promise microtask fired"); |
| microtaskExecuted = true; |
| performance.mark("mark3"); |
| }); |
| return; |
| } |
| |
| if (callbackCount === 2) { |
| shouldBe(`list.getEntries().length`, `2`); |
| shouldBeTrue(`microtaskExecuted`); |
| finishJSTest(); |
| return; |
| } |
| |
| testFailed("Callback should not have fired again"); |
| }); |
| |
| observer.observe({entryTypes: ["mark"]}); |
| performance.mark("mark1"); |
| </script> |
| <script src="../resources/js-test-post.js"></script> |
| </body> |
| </html> |
