browser_devtools-previously-started.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/. */

"use strict";

add_task(async function test() {

  info(

    "Test what happens if the profiler was previously started by another tool."

);

  const { startProfiler } = ChromeUtils.importESModule(

    "resource://devtools/client/performance-new/shared/background.sys.mjs"

);

  info("Start the profiler before DevTools is loaded.");

  startProfiler("aboutprofiling");

  await withDevToolsPanel(async document => {

    const getRecordingState = setupGetRecordingState(document);

    // The initial state of the profiler UI is racy, as it calls out to the PerfFront

    // to get the status of the profiler. This can race with the initialization of

    // the test. Most of the the time the result is "not-yet-known", but rarely

    // the PerfFront will win this race. Allow for both outcomes of the race in this

    // test.

ok(

      getRecordingState() === "not-yet-known" ||

        getRecordingState() === "recording",

      "The component starts out in an unknown state or in a recording state."

);

    const cancelRecording = await getActiveButtonFromText(

      document,

      "Cancel recording"

);

is(

      getRecordingState(),

      "recording",

      "The profiler is reflecting the recording state."

);

    info("Click the button to cancel the recording");

    cancelRecording.click();

is(

      getRecordingState(),

      "request-to-stop-profiler",

      "We can request to stop the profiler."

);

    await getActiveButtonFromText(document, "Start recording");

is(

      getRecordingState(),

      "available-to-record",

      "The profiler is now available to record."

);

});

});