File: sxg-navigation-timing.tentative.html

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<!DOCTYPE html>
<title>Navigation timing of SignedHTTPExchange</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="./resources/sxg-util.js"></script>
<body>
<script>
promise_test(async (t) => {
  const sxgUrl = get_host_info().HTTPS_ORIGIN + '/signed-exchange/resources/sxg/sxg-navigation-timing.sxg';
  const message = await openSXGInIframeAndWaitForMessage(t, sxgUrl);
  assert_false(message.is_fallback);

  let timing = JSON.parse(message.timing);
  let originalContent = await fetch('resources/sxg-navigation-timing.html').then(resp => resp.arrayBuffer());

  assert_equals(timing.decodedBodySize, originalContent.byteLength);
  assert_equals(timing.encodedBodySize, computeMiceLength(originalContent.byteLength, 100));
  // TODO(https://crbug.com/928589): Test other fields too.
}, 'Navigation timing of SignedHTTPExchange');

// Returns content length after MI encode.
function computeMiceLength(len, recordSize) {
  const recordSizeLen = 8;
  const sha256DigestLength = 32;
  return recordSizeLen + len + Math.floor(len / recordSize) * sha256DigestLength;
}

</script>
</body>