| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Verify that postmessage tasks can be properly tracked.</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <script> |
| promise_test(t => { |
| const scriptId = scheduler.taskId; |
| const channel = new MessageChannel(); |
| |
| const frame = document.createElement("iframe"); |
| frame.addEventListener("load", () => { |
| frame.contentWindow.postMessage("port", "*", [channel.port2]); |
| }); |
| frame.src = "resources/messageport-postmessage-iframe.html"; |
| document.body.appendChild(frame); |
| |
| return new Promise((resolve, reject) => { |
| channel.port1.onmessage = e => { |
| try { |
| assert_equals(scheduler.isAncestor(e.data), "ancestor"); |
| resolve(); |
| } catch(e) { |
| reject(e); |
| } |
| } |
| }); |
| }, "Same-origin iframe MessagePort postMessage task properly detects its parent task."); |
| |
| </script> |
| </body> |
| </html> |
