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// META: script=/resources/test-only-api.js
// META: script=resources/pressure-helpers.js
// META: global=window,dedicatedworker,sharedworker
'use strict';
pressure_test(async (t, mockPressureService) => {
const observer1_changes = [];
const observer1 = new PressureObserver(changes => {
observer1_changes.push(changes);
});
t.add_cleanup(() => observer1.disconnect());
// Ensure that observer1's schema gets registered before observer2 starts.
const promise = observer1.observe('cpu');
observer1.disconnect();
await promise_rejects_dom(t, 'AbortError', promise);
const observer2_changes = [];
await new Promise((resolve, reject) => {
const observer2 = new PressureObserver(changes => {
observer2_changes.push(changes);
resolve();
});
t.add_cleanup(() => observer2.disconnect());
observer2.observe('cpu').catch(reject);
mockPressureService.setPressureUpdate('cpu', 'critical');
mockPressureService.startPlatformCollector(/*sampleInterval=*/ 200);
});
assert_equals(
observer1_changes.length, 0,
'stopped observers should not receive callbacks');
assert_equals(observer2_changes.length, 1);
assert_equals(observer2_changes[0].length, 1);
assert_equals(observer2_changes[0][0].state, 'critical');
}, 'Stopped PressureObserver do not receive changes');
pressure_test(async (t, mockPressureService) => {
const observer1_changes = [];
const observer1 = new PressureObserver(changes => {
observer1_changes.push(changes);
});
t.add_cleanup(() => observer1.disconnect());
const observer2_changes = [];
await new Promise(async resolve => {
const observer2 = new PressureObserver(changes => {
observer2_changes.push(changes);
resolve();
});
t.add_cleanup(() => observer2.disconnect());
const promise = observer1.observe('cpu');
observer2.observe('cpu');
observer1.disconnect();
await promise_rejects_dom(t, 'AbortError', promise);
mockPressureService.setPressureUpdate('cpu', 'critical');
mockPressureService.startPlatformCollector(/*sampleInterval=*/ 200);
});
assert_equals(
observer1_changes.length, 0,
'stopped observers should not receive callbacks');
assert_equals(observer2_changes.length, 1);
assert_equals(observer2_changes[0][0].state, 'critical');
}, 'Removing observer before observe() resolves does not affect other observers');
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