test_get_profile.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/. */

// Test Services.profiler.GetProfile() and Services.profiler.getProfileData().

add_task(async () => {

  Assert.ok(!Services.profiler.IsActive());

  await Services.profiler.StartProfiler(100, 10, []);

  Assert.ok(Services.profiler.IsActive());

  await new Promise(resolve => do_timeout(100, resolve));

  // Check text profile format

  var profileStr = Services.profiler.GetProfile();

  Assert.greater(profileStr.length, 10);

  // check json profile format

  var profileObj = Services.profiler.getProfileData();

  Assert.notEqual(profileObj, null);

  Assert.notEqual(profileObj.threads, null);

  Assert.greaterOrEqual(profileObj.threads.length, 1);

  Assert.notEqual(profileObj.threads[0].samples, null);

  // NOTE: The number of samples will be empty since we

  //       don't have any labels in the xpcshell code

  await Services.profiler.StopProfiler();

  Assert.ok(!Services.profiler.IsActive());

});