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Test Info: Warnings

// META: global=window,dedicatedworker,sharedworker
'use strict';
promise_test(async t => {
const observer =
new PressureObserver(t.unreached_func('oops should not end up here'));
t.add_cleanup(() => observer.disconnect());
await promise_rejects_js(t, TypeError, observer.observe('random'));
}, 'PressureObserver.observe() requires a valid source');
test(t => {
const observer =
new PressureObserver(t.unreached_func('oops should not end up here'));
t.add_cleanup(() => observer.disconnect());
assert_throws_js(TypeError, () => {
observer.unobserve('random');
});
}, 'PressureObserver.unobserve() requires a valid source');