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// META: title=StorageManager: estimate() for indexeddb
// META: script=/storage/buckets/resources/util.js
test(t => {
assert_true('estimate' in navigator.storage);
assert_equals(typeof navigator.storage.estimate, 'function');
assert_true(navigator.storage.estimate() instanceof Promise);
}, 'estimate() method exists and returns a Promise');
promise_test(async t => {
const estimate = await navigator.storage.estimate();
assert_equals(typeof estimate, 'object');
assert_true('usage' in estimate);
assert_equals(typeof estimate.usage, 'number');
assert_true('quota' in estimate);
assert_equals(typeof estimate.quota, 'number');
}, 'estimate() resolves to dictionary with members');
promise_test(async t => {
const arraySize = 1e6;
const objectStoreName = "storageManager";
const dbname =
this.window ? window.location.pathname : 'estimate-worker.https.html';
await indexedDbDeleteRequest(indexedDB, dbname);
let estimate = await navigator.storage.estimate();
const usageBeforeCreate = estimate.usage;
const db =
await indexedDbOpenRequest(t, indexedDB, dbname, (db_to_upgrade) => {
db_to_upgrade.createObjectStore(objectStoreName);
});
estimate = await navigator.storage.estimate();
const usageAfterCreate = estimate.usage;
assert_greater_than(
usageAfterCreate, usageBeforeCreate,
'estimated usage should increase after object store is created');
const txn = db.transaction(objectStoreName, 'readwrite');
const buffer = new ArrayBuffer(arraySize);
const view = new Uint8Array(buffer);
for (let i = 0; i < arraySize; i++) {
view[i] = Math.floor(Math.random() * 255);
}
const testBlob = new Blob([buffer], {type: 'binary/random'});
txn.objectStore(objectStoreName).add(testBlob, 1);
await transactionPromise(txn);
estimate = await navigator.storage.estimate();
const usageAfterPut = estimate.usage;
assert_greater_than(
usageAfterPut, usageAfterCreate,
'estimated usage should increase after large value is stored');
db.close();
}, 'estimate() shows usage increase after large value is stored');
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