compute_pressure_update_toJSON.https.any.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_update_toJSON.https.any.html - WPT Dashboard Interop Dashboard
- /compute-pressure/compute_pressure_update_toJSON.https.any.sharedworker.html - WPT Dashboard Interop Dashboard
- /compute-pressure/compute_pressure_update_toJSON.https.any.worker.html - WPT Dashboard Interop Dashboard

// META: script=/resources/test-only-api.js

// META: script=resources/pressure-helpers.js

// META: global=window,dedicatedworker,sharedworker

pressure_test(async (t, mockPressureService) => {

  const changes = await new Promise(resolve => {

    const observer = new PressureObserver(resolve);

    observer.observe('cpu');

    mockPressureService.setPressureUpdate('cpu', 'critical');

    mockPressureService.startPlatformCollector(/*sampleInterval=*/ 200);

});

  assert_true(changes.length === 1);

  const json = changes[0].toJSON();

  assert_equals(json.state, 'critical');

  assert_equals(json.source, 'cpu');

  assert_equals(typeof json.time, 'number');

}, 'Basic functionality test');