buffer-full-inspect-buffer-during-callback.html

<!DOCTYPE HTML>
<html>
<head onload>
<meta charset="utf-8" />
<title>This test validates the buffer doesn't contain more entries than it should inside onresourcetimingbufferfull callback.</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-setresourcetimingbuffersize"/>
<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 t => {
    performance.addEventListener('resourcetimingbufferfull', t.step_func(() => {
        assert_equals(performance.getEntriesByType("resource").length, 1,
            "resource timing buffer in resourcetimingbufferfull is the size of the limit");
        load.xhr_sync(scriptResources[2]);
        performance.setResourceTimingBufferSize(3);
        assert_equals(performance.getEntriesByType("resource").length, 1,
            "A sync request must not be added to the primary buffer just yet, because it is full");
    }));
    await forceBufferFullEvent();
    await waitForNextTask();
    checkEntries(3);
}, "Test that entries in the secondary buffer are not exposed during the callback and before they are copied to the primary buffer");
</script>
</body>
</html>

chromium/third_party/blink/web_tests/external/wpt/resource-timing/buffer-full-inspect-buffer-during-callback.html