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// META: script=/resources/test-only-api.js
// META: script=resources/pressure-helpers.js
// META: global=window,dedicatedworker,sharedworker
'use strict';
test(t => {
const observer = new PressureObserver(() => {
assert_unreached('The observer callback should not be called');
});
t.add_cleanup(() => observer.disconnect());
observer.disconnect();
}, 'Call disconnect() directly should not crash');
pressure_test(async (t, mockPressureService) => {
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_changes = [];
await new Promise((resolve, reject) => {
const observer2 = new PressureObserver(change => {
observer2_changes.push(change);
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,
'disconnected 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');
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