speculation-measurement-early-hints-preconnect.html

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<!DOCTYPE html>

<meta charset=utf-8>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="early-hints-helpers.sub.js"></script>

<body>

<script>

const preconnects = getPreconnectsFromSearchParams();

for (const expected of preconnects) {

  const coLabel = "crossorigin_attr" in expected

      ? `crossorigin=${expected.crossorigin_attr || "anonymous"}`

      : "no crossorigin";

  promise_test(async t => {

    assert_true(typeof performance.getSpeculations === 'function',

      "SpeculationMeasurement feature must be enabled");

    assert_true('PreconnectData' in window, "PreconnectData should exist");

    const origin = new URL(expected.url).origin;

    // Map the crossorigin attribute to the reflected CrossOriginMode enum.

    let expectedCrossOrigin = 'none';

    if ('crossorigin_attr' in expected) {

      expectedCrossOrigin =

          (expected.crossorigin_attr === '' ||

           expected.crossorigin_attr === 'anonymous')

              ? 'anonymous'

              : 'use-credentials';

    const matches = performance.getSpeculations().preconnects.filter(

        p => p.origin === origin && p.crossorigin === expectedCrossOrigin);

    assert_equals(matches.length, 1,

      "exactly one matching preconnect entry");

    assert_true(matches[0].earlyhint,

      "earlyhint should be true for an Early Hints preconnect");

  }, `Early Hints preconnect: ${coLabel}`);

</script>

</body>