compute_pressure_disconnect.https.window.js

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /compute-pressure/compute_pressure_disconnect.https.window.html?globalScope=dedicated_worker - WPT Dashboard Interop Dashboard
- /compute-pressure/compute_pressure_disconnect.https.window.html?globalScope=window - WPT Dashboard Interop Dashboard

// 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

'use strict';

pressure_test(async t => {

  const observer = new PressureObserver(() => {

    assert_unreached('The observer callback should not be called');

});

  t.add_cleanup(() => observer.disconnect());

  observer.disconnect();

}, 'Calling disconnect() immediately should not crash');

pressure_test(async t => {

  await create_virtual_pressure_source('cpu');

  t.add_cleanup(async () => {

    await remove_virtual_pressure_source('cpu');

});

  const observer1_changes = [];

  const observer1 = new PressureObserver(change => {

    observer1_changes.push(change);

});

  t.add_cleanup(() => observer1.disconnect());

  // Ensure that observer1's schema gets registered before observer2 starts.

  await observer1.observe('cpu');

  observer1.disconnect();

  const observer2_promise = new Promise((resolve, reject) => {

    const observer = new PressureObserver(resolve);

    t.add_cleanup(() => observer.disconnect());

    observer.observe('cpu').catch(reject);

});

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

  const observer2_changes = await observer2_promise;

  assert_equals(

      observer1_changes.length, 0,

      'disconnected observers should not receive callbacks');

  assert_equals(observer2_changes.length, 1);

  assert_equals(observer2_changes[0].state, 'critical');

}, 'Stopped PressureObserver do not receive changes');

mark_as_done();