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// META: timeout=long
// META: script=/resources/test-only-api.js
// META: script=resources/pressure-helpers.js
// META: global=window,dedicatedworker,sharedworker
'use strict';
pressure_test((t, mockPressureService) => {
const observer = new PressureObserver(() => {
assert_unreached('The observer callback should not be called');
});
mockPressureService.setExpectedFailure(
new DOMException('', 'NotSupportedError'));
return promise_rejects_dom(t, 'NotSupportedError', observer.observe('cpu'));
}, 'Return NotSupportedError when calling observer()');
pressure_test(async (t, mockPressureService) => {
const changes = await new Promise(resolve => {
const observer = new PressureObserver(resolve);
t.add_cleanup(() => observer.disconnect());
observer.observe('cpu');
mockPressureService.setPressureUpdate('cpu', 'critical');
mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
});
assert_true(changes.length === 1);
assert_equals(changes[0].state, 'critical');
assert_equals(changes[0].source, 'cpu');
assert_equals(typeof changes[0].time, 'number');
}, 'Basic functionality test');
pressure_test((t, mockPressureService) => {
const observer = new PressureObserver(() => {
assert_unreached('The observer callback should not be called');
});
const promise = observer.observe('cpu');
observer.unobserve('cpu');
mockPressureService.setPressureUpdate('cpu', 'critical');
mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
return promise_rejects_dom(t, 'NotSupportedError', promise);
}, 'Removing observer before observe() resolves works');
pressure_test(async (t, mockPressureService) => {
const callbackPromises = [];
const observePromises = [];
for (let i = 0; i < 2; i++) {
callbackPromises.push(new Promise(resolve => {
const observer = new PressureObserver(resolve);
t.add_cleanup(() => observer.disconnect());
observePromises.push(observer.observe('cpu'));
}));
}
await Promise.all(observePromises);
mockPressureService.setPressureUpdate('cpu', 'critical');
mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
return Promise.all(callbackPromises);
}, 'Calling observe() multiple times works');
pressure_test(async (t, mockPressureService) => {
const observer1_changes = [];
await new Promise(resolve => {
const observer1 = new PressureObserver(changes => {
observer1_changes.push(changes);
resolve();
});
t.add_cleanup(() => observer1.disconnect());
observer1.observe('cpu');
mockPressureService.setPressureUpdate('cpu', 'critical');
mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
});
assert_true(observer1_changes.length === 1);
assert_equals(observer1_changes[0][0].source, 'cpu');
assert_equals(observer1_changes[0][0].state, 'critical');
const observer2_changes = [];
await new Promise(resolve => {
const observer2 = new PressureObserver(changes => {
observer2_changes.push(changes);
resolve();
});
t.add_cleanup(() => observer2.disconnect());
observer2.observe('cpu');
});
assert_true(observer2_changes.length === 1);
assert_equals(observer2_changes[0][0].source, 'cpu');
assert_equals(observer2_changes[0][0].state, 'critical');
}, 'Starting a new observer after an observer has started works');
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