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Test Info: Warnings
- This test has a WPT meta file that expects 1 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/manual/the-offscreen-canvas/offscreencanvas.transferrable.sw.https.window.html - WPT Dashboard Interop Dashboard
// META: script=/resources/testdriver.js
// META: script=/resources/testdriver-vendor.js
// META: script=/service-workers/service-worker/resources/test-helpers.sub.js
function unregisterAllServiceWorker() {
return navigator.serviceWorker.getRegistrations().then(registrations => {
return Promise.all(registrations.map(r => r.unregister()));
});
}
async function prepareActiveServiceWorker(script) {
await unregisterAllServiceWorker();
const reg = await navigator.serviceWorker.register(script);
add_completion_callback(() => reg.unregister());
await navigator.serviceWorker.ready;
return reg;
}
let registration;
promise_setup(async () => {
registration = await prepareActiveServiceWorker("offscreencanvas.transferrable.sw.js");
});
promise_test(async () => {
const canvas = new OffscreenCanvas(100, 100);
registration.active.postMessage({ canvas }, { transfer: [canvas] });
const data = await new Promise(resolve => navigator.serviceWorker.addEventListener("message", ev => {
resolve(ev.data);
}, { once: true }));
assert_equals(data.constructorName, "OffscreenCanvas", "Should get OffscreenCanvas from the window")
assert_true(data.canvas instanceof OffscreenCanvas, "Should get OffscreenCanvas from the service worker");
}, "Sending and receiving OffscreenCanvas between window and service worker");