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// META: title=StorageManager: estimate() for indexeddb
function indexedDbOpenRequest(t, dbname, upgrade_func) {
return new Promise((resolve, reject) => {
const openRequest = indexedDB.open(dbname);
t.add_cleanup(() => {
indexedDbDeleteRequest(dbname);
});
openRequest.onerror = () => {
reject(openRequest.error);
};
openRequest.onsuccess = () => {
resolve(openRequest.result);
};
openRequest.onupgradeneeded = event => {
upgrade_func(openRequest.result);
};
});
}
function indexedDbDeleteRequest(name) {
return new Promise((resolve, reject) => {
const deleteRequest = indexedDB.deleteDatabase(name);
deleteRequest.onerror = () => {
reject(deleteRequest.error);
};
deleteRequest.onsuccess = () => {
resolve();
};
});
}
function transactionPromise(txn) {
return new Promise((resolve, reject) => {
txn.onabort = () => {
reject(txn.error);
};
txn.oncomplete = () => {
resolve();
};
});
}
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(dbname);
let estimate = await navigator.storage.estimate();
const usageBeforeCreate = estimate.usage;
const db = await indexedDbOpenRequest(t, 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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