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// META: script=/resources/test-only-api.js
// META: script=resources/pressure-helpers.js
// META: global=window,dedicatedworker,sharedworker
'use strict';
// Regression test for https://issues.chromium.org/issues/333957909
// Make sure that observe() always returns a Promise.
pressure_test(async (t, mockPressureService) => {
const observer = new PressureObserver(() => {});
t.add_cleanup(() => observer.disconnect());
for (let i = 0; i < 2; i++) {
const promise = observer.observe('cpu');
assert_class_string(promise, 'Promise');
await promise;
}
}, 'PressureObserver.observe() is idempotent');
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