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// META: title=StorageManager: estimate()
test(function(t) {
assert_true(navigator.storage.estimate() instanceof Promise);
}, 'estimate() method returns a Promise');
promise_test(function(t) {
return navigator.storage.estimate().then(function(result) {
assert_equals(typeof result, 'object');
assert_true('usage' in result);
assert_equals(typeof result.usage, 'number');
assert_true('quota' in result);
assert_equals(typeof result.quota, 'number');
});
}, 'estimate() resolves to dictionary with members');
promise_test(function(t) {
const large_value = new Uint8Array(1e6);
const dbname = `db-${location}-${t.name}`;
let db, before, after;
indexedDB.deleteDatabase(dbname);
return new Promise((resolve, reject) => {
const open = indexedDB.open(dbname);
open.onerror = () => { reject(open.error); };
open.onupgradeneeded = () => {
const connection = open.result;
connection.createObjectStore('store');
};
open.onsuccess = () => {
const connection = open.result;
t.add_cleanup(() => {
connection.close();
indexedDB.deleteDatabase(dbname);
});
resolve(connection);
};
})
.then(connection => {
db = connection;
return navigator.storage.estimate();
})
.then(estimate => {
before = estimate.usage;
return new Promise((resolve, reject) => {
const tx = db.transaction('store', 'readwrite');
tx.objectStore('store').put(large_value, 'key');
tx.onabort = () => { reject(tx.error); };
tx.oncomplete = () => { resolve(); };
});
})
.then(() => {
return navigator.storage.estimate();
})
.then(estimate => {
after = estimate.usage;
assert_greater_than(after, before,
'estimated usage should increase');
});
}, 'estimate() shows usage increase after 1MB IndexedDB record is stored');
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