mirror of
https://github.com/servo/servo.git
synced 2025-07-13 02:13:40 +01:00
85 lines
2.6 KiB
HTML
85 lines
2.6 KiB
HTML
<!DOCTYPE HTML>
|
|
<html>
|
|
<head>
|
|
<meta charset="utf-8">
|
|
<link rel="help" href="https://w3c.github.io/resource-timing/#dom-performance-setresourcetimingbuffersize">
|
|
<title>This test validates that setResourceTimingBufferFull behaves appropriately when set to the current buffer level.</title>
|
|
<script src="/resources/testharness.js"></script>
|
|
<script src="/resources/testharnessreport.js"></script>
|
|
<script src="resources/buffer-full-utilities.js"></script>
|
|
</head>
|
|
<body>
|
|
<script>
|
|
let eventFired = false;
|
|
let loadRandomResource = () => {
|
|
return fetch(window.location.href + "?" + Math.random());
|
|
}
|
|
|
|
setup(() => {
|
|
// Get the browser into a consistent state.
|
|
clearBufferAndSetSize(100);
|
|
});
|
|
|
|
let loadResourcesToFillFutureBuffer = () => {
|
|
return new Promise(resolve => {
|
|
// Gather up 3 Resource Entries to kick off the rest of test behavior.
|
|
let resources = 0;
|
|
let observer = new PerformanceObserver(function(list) {
|
|
resources += list.getEntriesByType("resource").length;
|
|
if (resources !== 3)
|
|
return;
|
|
observer.disconnect();
|
|
resolve();
|
|
});
|
|
observer.observe({entryTypes: ["resource"]});
|
|
for (let i = 0; i < 3; ++i)
|
|
loadRandomResource();
|
|
});
|
|
};
|
|
|
|
let setBufferFullEventAndBufferSize = () => {
|
|
performance.setResourceTimingBufferSize(3);
|
|
performance.onresourcetimingbufferfull = function() {
|
|
eventFired = true;
|
|
performance.clearResourceTimings();
|
|
};
|
|
};
|
|
|
|
let clearAndAddAnotherEntryToBuffer = () => {
|
|
return new Promise(resolve => {
|
|
performance.clearResourceTimings();
|
|
loadRandomResource().then(resolve);
|
|
});
|
|
};
|
|
|
|
let testThatEntryWasAdded = () => {
|
|
let tries = 1;
|
|
let maxTries = 5;
|
|
return waitUntilConditionIsMet( function() {
|
|
if (performance.getEntriesByType("resource").length) {
|
|
return true;
|
|
} else {
|
|
if (tries < maxTries) {
|
|
tries++;
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
}).then( () => {
|
|
assert_true((performance.getEntriesByType("resource").length) === 1);
|
|
});
|
|
};
|
|
|
|
promise_test(async () => {
|
|
await loadResourcesToFillFutureBuffer();
|
|
setBufferFullEventAndBufferSize();
|
|
// Overflow the buffer.
|
|
await loadRandomResource();
|
|
await waitForEventToFire();
|
|
await clearAndAddAnotherEntryToBuffer();
|
|
// Since we have no strict guarantees when an entry will be added to the
|
|
// buffer, waiting till next task to try to avoid flakiness.
|
|
await testThatEntryWasAdded();
|
|
}, "Test that entry was added to the buffer after a buffer full event");
|
|
</script>
|