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// META: script=resources/support-promises.js
promise_test(async t => {
const db = await createDatabase(t, db => {
const store = db.createObjectStore('store');
store.createIndex('index', 'value');
store.put({value: 1}, 1);
store.put({value: 2}, 2);
store.put({value: 3}, 3);
});
{
// Iterate over all index entries until an upper bound is reached.
// On each record found, increment the value used as the index
// key, which will make it show again up later in the iteration.
const tx = db.transaction('store', 'readwrite', {durability: 'relaxed'});
const range = IDBKeyRange.upperBound(9);
const index = tx.objectStore('store').index('index');
const request = index.openCursor(range);
request.onsuccess = t.step_func(e => {
const cursor = e.target.result;
if (!cursor)
return;
const record = cursor.value;
record.value += 1;
cursor.update(record);
cursor.continue();
});
await promiseForTransaction(t, tx);
}
{
const tx = db.transaction('store', 'readonly', {durability: 'relaxed'});
const results = await promiseForRequest(t, tx.objectStore('store').getAll());
assert_array_equals(
results.map(record => record.value),
[10, 10, 10],
'Values should all be incremented until bound reached');
}
}, 'Index cursor - indexed values updated during iteration');
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