38 lines
1.5 KiB
JavaScript
38 lines
1.5 KiB
JavaScript
// META: title=StorageManager: estimate() for service worker registrations
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const wait_for_active = worker => new Promise(resolve =>{
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if (worker.active) { resolve(worker.active); }
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const listen_for_active = worker => e => {
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if (e.target.state === 'activated') { resolve(worker.active); }
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}
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if (worker.waiting) {
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worker.waiting
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.addEventListener('statechange', listen_for_active(worker.waiting));
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}
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if (worker.installing) {
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worker.installing
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.addEventListener('statechange', listen_for_active(worker.installing));
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}
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});
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promise_test(async t => {
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let estimate = await navigator.storage.estimate();
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const usageBeforeCreate = estimate.usageDetails.serviceWorkerRegistrations ||
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0;
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// Note: helpers.js is an arbitrary file; it could be any file that
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// exists, but this test does not depend on the contents of said file.
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const serviceWorkerRegistration = await
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navigator.serviceWorker.register('./helpers.js');
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t.add_cleanup(() => serviceWorkerRegistration.unregister());
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await wait_for_active(serviceWorkerRegistration);
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estimate = await navigator.storage.estimate();
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assert_true('serviceWorkerRegistrations' in estimate.usageDetails);
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const usageAfterCreate = estimate.usageDetails.serviceWorkerRegistrations;
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assert_greater_than(
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usageAfterCreate, usageBeforeCreate,
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'estimated usage should increase after service worker is registered');
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}, 'estimate() shows usage increase after large value is stored');
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