// META: script=performanceobservers.js | |
async_test(function (t) { | |
var callbackCount = 0; | |
var observer = new PerformanceObserver( | |
t.step_func(function (entryList, obs) { | |
callbackCount++; | |
if (callbackCount === 1) { | |
checkEntries(entryList.getEntries(), [ | |
{entryType: "measure", name: "measure1"}, | |
]); | |
observer.observe({entryTypes: ["mark"]}); | |
self.performance.mark("mark2"); | |
self.performance.measure("measure2"); | |
return; | |
} | |
if (callbackCount === 2) { | |
checkEntries(entryList.getEntries(), [ | |
{entryType: "mark", name: "mark2"}, | |
]); | |
self.performance.mark("mark-before-change-observe-state-to-measure"); | |
self.performance.measure("measure-before-change-observe-state-to-measure"); | |
observer.observe({entryTypes: ["measure"]}); | |
self.performance.mark("mark3"); | |
self.performance.measure("measure3"); | |
return; | |
} | |
if (callbackCount === 3) { | |
checkEntries(entryList.getEntries(), [ | |
{entryType: "measure", name: "measure3"}, | |
{entryType: "mark", name: "mark-before-change-observe-state-to-measure"}, | |
]); | |
self.performance.mark("mark-before-change-observe-state-to-both"); | |
self.performance.measure("measure-before-change-observe-state-to-both"); | |
observer.observe({entryTypes: ["mark", "measure"]}); | |
self.performance.mark("mark4"); | |
self.performance.measure("measure4"); | |
return; | |
} | |
if (callbackCount === 4) { | |
checkEntries(entryList.getEntries(), [ | |
{entryType: "measure", name: "measure-before-change-observe-state-to-both"}, | |
{entryType: "measure", name: "measure4"}, | |
{entryType: "mark", name: "mark4"}, | |
]); | |
self.performance.mark("mark-before-disconnect"); | |
self.performance.measure("measure-before-disconnect"); | |
observer.disconnect(); | |
self.performance.mark("mark-after-disconnect"); | |
self.performance.measure("measure-after-disconnect"); | |
t.done(); | |
return; | |
} | |
assert_unreached("The callback must not be invoked after disconnecting"); | |
}) | |
); | |
observer.observe({entryTypes: ["measure"]}); | |
self.performance.mark("mark1"); | |
self.performance.measure("measure1"); | |
}, "PerformanceObserver modifications inside callback should update filtering and not clear buffer"); |