| <!DOCTYPE HTML> |
| <html> |
| <head> |
| <script src="../resources/js-test.js"></script> |
| </head> |
| <body> |
| <script> |
| |
| window.jsTestIsAsync = true; |
| description("PerformanceNavigationTiming entries should only be queued once per observer."); |
| let navigation_callback_already_invoked = false |
| window.q = [] |
| |
| new Promise( (resolve) => { |
| new PerformanceObserver(function (entryList) { |
| entryList.getEntries().forEach(function(entry) { |
| shouldBeFalse("navigation_callback_already_invoked") |
| navigation_callback_already_invoked = true |
| resolve() |
| }) |
| }).observe({ type: "navigation", buffered: true }) |
| }) |
| .then( () => new Promise( (resolve) => { |
| // Produce another entry, completely unrelated to navigation: |
| new PerformanceObserver( (entryList, observer) => { |
| resolve() |
| }).observe({ type: "mark" }) |
| performance.mark("New mark") |
| })) |
| .then( () => { |
| // Spin the event loop to make sure pending spurious callbacks can run |
| // before the test is over: |
| setTimeout(() => finishJSTest(), 5) |
| }) |
| |
| </script> |
| </body> |
| </html> |
