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Test Info: Warnings
- 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_timestamp.https.window.html?globalScope=dedicated_worker - WPT Dashboard Interop Dashboard
- /compute-pressure/compute_pressure_timestamp.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 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_less_than(changes[0].time, performance.now());
}, 'Timestamp from update should be tied to the global object\'s time origin');
pressure_test(async (t) => {
await create_virtual_pressure_source('cpu');
t.add_cleanup(async () => {
await remove_virtual_pressure_source('cpu');
});
const readings = ['critical', 'critical'];
const syncObserver = new SyncPressureObserver(t);
// When disconnect() is called, PressureRecord in [[LastRecordMap]] for cpu
// should be cleared. The effect we observe in this test is the "has change
// in data" algorithm passing with the same state twice.
for (let i = 0; i < readings.length; ++i) {
await syncObserver.observer().observe('cpu', {sampleInterval: 500});
await update_virtual_pressure_source('cpu', readings[i]);
await syncObserver.waitForUpdate();
syncObserver.observer().disconnect();
}
const pressureChanges = syncObserver.changes();
assert_equals(pressureChanges.length, readings.length);
assert_equals(pressureChanges[0][0].state, 'critical');
assert_equals(pressureChanges[1][0].state, 'critical');
}, 'disconnect() should update [[LastRecordMap]]');
mark_as_done();