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<!DOCTYPE HTML>
<html>
<head onload>
<meta charset="utf-8" />
<title>This test validates that synchronously adding entries in onresourcetimingbufferfull callback results in these entries being properly handled.</title>
<link rel="author" title="Google" href="http://www.google.com/" />
<link rel="help" href="https://www.w3.org/TR/resource-timing-2/#dom-performance-onresourcetimingbufferfull"/>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/resource-loaders.js"></script>
<script src="resources/buffer-full-utilities.js"></script>
</head>
<body>
<script>
promise_test(async () => {
await fillUpTheBufferWithSingleResource();
performance.addEventListener('resourcetimingbufferfull', () => {
performance.setResourceTimingBufferSize(2);
// The sync entry is added to the secondary buffer, so will be the last one there and eventually dropped.
load.xhr_sync(scriptResources[2]);
});
// This resource overflows the entry buffer, and goes into the secondary buffer.
load.script(scriptResources[1]);
await bufferFullFirePromise;
checkEntries(2);
}, "Test that entries synchronously added to the buffer during the callback are dropped");
</script>
</body>
</html>
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