browser_test_markers_parent_process.js

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/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

add_task(async function test_markers_parent_process() {

  info("Test markers that are generated by the browser's parent process.");

  info("Start the profiler in nostacksampling mode.");

  await startProfiler({ features: ["nostacksampling"] });

  info("Dispatch a DOMEvent");

  window.dispatchEvent(new Event("synthetic"));

  info("Stop the profiler and get the profile.");

  const profile = await stopNowAndGetProfile();

  const markers = getInflatedMarkerData(profile.threads[0]);

    const domEventStart = markers.find(

      ({ phase, data }) =>

        phase === INTERVAL_START && data?.eventType === "synthetic"

);

    const domEventEnd = markers.find(

      ({ phase, data }) =>

        phase === INTERVAL_END && data?.eventType === "synthetic"

);

    ok(domEventStart, "A start DOMEvent was generated");

    ok(domEventEnd, "An end DOMEvent was generated");

    Assert.greater(

      domEventEnd.data.latency,

0,

      "DOMEvent had a a latency value generated."

);

    Assert.strictEqual(domEventEnd.data.type, "DOMEvent");

    Assert.strictEqual(domEventEnd.name, "DOMEvent");

  // Add more marker tests.

});