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'use strict';
let nextBackgroundFetchId = 0;
function loadScript(path) {
let script = document.createElement('script');
let promise = new Promise(resolve => script.onload = resolve);
script.src = path;
script.async = false;
document.head.appendChild(script);
return promise;
}
// Waits for a single message received from a registered Service Worker.
async function getMessageFromServiceWorker() {
return new Promise(resolve => {
function listener(event) {
navigator.serviceWorker.removeEventListener('message', listener);
resolve(event.data);
}
navigator.serviceWorker.addEventListener('message', listener);
});
}
// Registers the |name| instrumentation Service Worker located at "service_workers/"
// with a scope unique to the test page that's running, and waits for it to be
// activated. The Service Worker will be unregistered automatically.
//
// Depends on /service-workers/service-worker/resources/test-helpers.sub.js
async function registerAndActivateServiceWorker(test, name) {
const script = `service_workers/${name}`;
const scope = 'service_workers/scope' + location.pathname;
let serviceWorkerRegistration =
await service_worker_unregister_and_register(test, script, scope);
add_completion_callback(() => serviceWorkerRegistration.unregister());
await wait_for_state(test, serviceWorkerRegistration.installing, 'activated');
return serviceWorkerRegistration;
}
// Creates a Promise test for |func| given the |description|. The |func| will be
// executed with the `backgroundFetch` object of an activated Service Worker
// Registration.
// |workerName| is the name of the service worker file in the service_workers
// directory to register.
function backgroundFetchTest(func, description, workerName = 'sw.js') {
promise_test(async t => {
if (typeof test_driver === 'undefined') {
await loadScript('/resources/testdriver.js');
await loadScript('/resources/testdriver-vendor.js');
}
await test_driver.set_permission({name: 'background-fetch'}, 'granted');
const serviceWorkerRegistration =
await registerAndActivateServiceWorker(t, workerName);
serviceWorkerRegistration.active.postMessage(null);
assert_equals(await getMessageFromServiceWorker(), 'ready');
return func(t, serviceWorkerRegistration.backgroundFetch);
}, description);
}
// Returns a Background Fetch ID that's unique for the current page.
function uniqueId() {
return 'id' + nextBackgroundFetchId++;
}