| <!doctype html> |
| <html> |
| <head> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <script> |
| async_test(function(test) { |
| let first_callback_called = false |
| let callback_can_run_now = false |
| |
| new Promise( (resolve) => { |
| new PerformanceObserver( (entries, observer) => { |
| first_callback_called = true |
| observer.disconnect() |
| resolve() |
| }).observe({ type: "mark", buffered: true }) |
| }) |
| .then( () => { |
| new PerformanceObserver ( (entries) => { |
| assert_true(callback_can_run_now, "Callback shouldn't be invoked inside the .observe() call") |
| test.done() |
| }).observe({ type: "mark", buffered: true }) |
| callback_can_run_now = true |
| }) |
| assert_false(first_callback_called) |
| performance.mark('mark') |
| }, "Buffered PerformanceObservers should not invoke callbacks synchronously."); |
| |
| </script> |
| </body> |
| </html> |
