compute_pressure_duplicate_updates.https.window.js

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /compute-pressure/compute_pressure_duplicate_updates.https.window.html?globalScope=dedicated_worker - WPT Dashboard Interop Dashboard
- /compute-pressure/compute_pressure_duplicate_updates.https.window.html?globalScope=window - WPT Dashboard Interop Dashboard

// META: timeout=long

// 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

// META: script=./resources/sync-pressure-observer.js

'use strict';

pressure_test(async (t) => {

  await create_virtual_pressure_source('cpu');

  t.add_cleanup(async () => {

    await remove_virtual_pressure_source('cpu');

});

  const syncObserver = new SyncPressureObserver(t);

  await syncObserver.observer().observe('cpu', {sampleInterval: 100});

  await update_virtual_pressure_source('cpu', 'critical');

  await syncObserver.waitForUpdate();

  assert_equals(syncObserver.changes()[0][0].state, 'critical');

  await update_virtual_pressure_source('cpu', 'critical');

  await new Promise(resolve => {t.step_timeout(resolve, 3000)});

  assert_equals(syncObserver.changes().length, 1);

  await update_virtual_pressure_source('cpu', 'nominal');

  await syncObserver.waitForUpdate();

  assert_equals(syncObserver.changes()[1][0].state, 'nominal');

  assert_equals(syncObserver.changes().length, 2);

}, 'Changes that fail the "has change in data" test are discarded.');

mark_as_done();