File: compute_pressure_update_toJSON.https.window.js

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// META: variant=?globalScope=window
// META: variant=?globalScope=dedicated_worker
// META: script=/resources/testdriver.js
// META: script=/resources/testdriver-vendor.js
// META: script=/common/utils.js
// META: script=/common/dispatcher/dispatcher.js
// META: script=./resources/common.js

pressure_test(async t => {
  await create_virtual_pressure_source('cpu');
  t.add_cleanup(async () => {
    await remove_virtual_pressure_source('cpu');
  });

  const changes = await new Promise((resolve, reject) => {
    const observer = new PressureObserver(resolve);
    t.add_cleanup(() => observer.disconnect());
    observer.observe('cpu').catch(reject);
    update_virtual_pressure_source('cpu', 'critical').catch(reject);
  });
  assert_equals(1, changes.length);
  const json = changes[0].toJSON();
  assert_equals(json.state, 'critical');
  assert_equals(json.source, 'cpu');
  assert_equals(typeof json.time, 'number');
}, 'Basic functionality test');

mark_as_done();