compute_pressure_observe_idempotent.https.window.js (943B)
1 // META: variant=?globalScope=window 2 // META: variant=?globalScope=dedicated_worker 3 // META: script=/resources/testdriver.js 4 // META: script=/resources/testdriver-vendor.js 5 // META: script=/common/utils.js 6 // META: script=/common/dispatcher/dispatcher.js 7 // META: script=./resources/common.js 8 9 'use strict'; 10 11 pressure_test(async t => { 12 await create_virtual_pressure_source('cpu'); 13 t.add_cleanup(async () => { 14 await remove_virtual_pressure_source('cpu'); 15 }); 16 17 const update = await new Promise((resolve, reject) => { 18 const observer = new PressureObserver(resolve); 19 t.add_cleanup(() => observer.disconnect()); 20 observer.observe('cpu').catch(reject); 21 observer.observe('cpu').catch(reject); 22 observer.observe('cpu').catch(reject); 23 update_virtual_pressure_source('cpu', 'critical').catch(reject); 24 }); 25 26 assert_equals(update[0].state, 'critical'); 27 }, 'PressureObserver.observe() is idempotent'); 28 29 mark_as_done();