File: early-hints-response-time.h2.html

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<!DOCTYPE html>
<head>
<meta charset="utf-8">
<meta name="timeout" content="long">
<script src="/common/utils.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<script>
  promise_test(async t => {
    const iframe = document.createElement("iframe");
    const params = new URLSearchParams();
    const delays = [200, 100, 150];
    params.set("delay1", delays[0]);
    params.set("delay2", delays[1]);

    iframe.src = `resources/early-hints-delay.h2.py?${params.toString()}`;
    document.body.appendChild(iframe);
    t.add_cleanup(() => iframe.remove());
    await new Promise(resolve => iframe.addEventListener("load", resolve));
    const [entry] = iframe.contentWindow.performance.getEntriesByType("navigation");
    assert_greater_than(entry.firstInterimResponseStart, entry.requestStart + delays[0]);
    assert_greater_than(entry.finalResponseHeadersStart, entry.firstInterimResponseStart + delays[1]);
    assert_equals(entry.responseStart, entry.firstInterimResponseStart);
}, `Interim response times should correspond to delays (h2)`);
</script>
</body>