54 lines
2 KiB
JavaScript
54 lines
2 KiB
JavaScript
// META: timeout=long
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// META: variant=?globalScope=window
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// META: variant=?globalScope=dedicated_worker
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// META: script=/resources/testdriver.js
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// META: script=/resources/testdriver-vendor.js
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// META: script=/common/utils.js
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// META: script=/common/dispatcher/dispatcher.js
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// META: script=./resources/common.js
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// META: script=./resources/sync-pressure-observer.js
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'use strict';
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pressure_test(async (t) => {
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await create_virtual_pressure_source('cpu');
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t.add_cleanup(async () => {
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await remove_virtual_pressure_source('cpu');
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});
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const changes = await new Promise((resolve, reject) => {
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const observer = new PressureObserver(resolve);
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t.add_cleanup(() => observer.disconnect());
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observer.observe('cpu').catch(reject);
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update_virtual_pressure_source('cpu', 'critical').catch(reject);
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});
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assert_less_than(changes[0].time, performance.now());
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}, 'Timestamp from update should be tied to the global object\'s time origin');
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pressure_test(async (t) => {
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await create_virtual_pressure_source('cpu');
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t.add_cleanup(async () => {
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await remove_virtual_pressure_source('cpu');
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});
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const readings = ['critical', 'critical'];
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const syncObserver = new SyncPressureObserver(t);
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// When disconnect() is called, PressureRecord in [[LastRecordMap]] for cpu
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// should be cleared. The effect we observe in this test is the "has change
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// in data" algorithm passing with the same state twice.
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for (let i = 0; i < readings.length; ++i) {
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await syncObserver.observer().observe('cpu', {sampleInterval: 500});
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await update_virtual_pressure_source('cpu', readings[i]);
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await syncObserver.waitForUpdate();
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syncObserver.observer().disconnect();
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}
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const pressureChanges = syncObserver.changes();
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assert_equals(pressureChanges.length, readings.length);
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assert_equals(pressureChanges[0][0].state, 'critical');
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assert_equals(pressureChanges[1][0].state, 'critical');
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}, 'disconnect() should update [[LastRecordMap]]');
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mark_as_done();
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