offscreencanvas.transferrable.sw.https.window.js (1344B)
1 // META: script=/resources/testdriver.js 2 // META: script=/resources/testdriver-vendor.js 3 // META: script=/service-workers/service-worker/resources/test-helpers.sub.js 4 5 function unregisterAllServiceWorker() { 6 return navigator.serviceWorker.getRegistrations().then(registrations => { 7 return Promise.all(registrations.map(r => r.unregister())); 8 }); 9 } 10 11 async function prepareActiveServiceWorker(script) { 12 await unregisterAllServiceWorker(); 13 const reg = await navigator.serviceWorker.register(script); 14 add_completion_callback(() => reg.unregister()); 15 await navigator.serviceWorker.ready; 16 return reg; 17 } 18 19 let registration; 20 21 promise_setup(async () => { 22 registration = await prepareActiveServiceWorker("offscreencanvas.transferrable.sw.js"); 23 }); 24 25 promise_test(async () => { 26 const canvas = new OffscreenCanvas(100, 100); 27 registration.active.postMessage({ canvas }, { transfer: [canvas] }); 28 const data = await new Promise(resolve => navigator.serviceWorker.addEventListener("message", ev => { 29 resolve(ev.data); 30 }, { once: true })); 31 assert_equals(data.constructorName, "OffscreenCanvas", "Should get OffscreenCanvas from the window") 32 assert_true(data.canvas instanceof OffscreenCanvas, "Should get OffscreenCanvas from the service worker"); 33 }, "Sending and receiving OffscreenCanvas between window and service worker");