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// Returns the "name" property written to the object with the given ID.
function nameForId(id) {
return `Object ${id}`;
}
// Initial database setup used by all the reading-autoincrement tests.
async function setupAutoincrementDatabase(testCase) {
const database = await createDatabase(testCase, database => {
const store = database.createObjectStore(
'store', { autoIncrement: true, keyPath: 'id' });
store.createIndex('by_name', 'name', { unique: true });
store.createIndex('by_id', 'id', { unique: true });
// Cover writing from the initial upgrade transaction.
for (let i = 1; i <= 16; ++i) {
if (i % 2 == 0) {
store.put({name: nameForId(i), id: i});
} else {
store.put({name: nameForId(i)});
}
}
});
// Cover writing from a subsequent transaction.
const transaction = database.transaction(['store'], 'readwrite');
const store = transaction.objectStore('store');
for (let i = 17; i <= 32; ++i) {
if (i % 2 == 0) {
store.put({name: nameForId(i), id: i});
} else {
store.put({name: nameForId(i)});
}
}
await promiseForTransaction(testCase, transaction);
return database;
}
// Returns the IDs used by the object store, sorted as strings.
//
// This is used to determine the correct order of records when retrieved from an
// index that uses stringified IDs.
function idsSortedByStringCompare() {
const stringIds = [];
for (let i = 1; i <= 32; ++i)
stringIds.push(i);
stringIds.sort((a, b) => indexedDB.cmp(`${a}`, `${b}`));
return stringIds;
}
async function iterateCursor(testCase, cursorRequest, callback) {
// This uses requestWatcher() directly instead of using promiseForRequest()
// inside the loop to avoid creating multiple EventWatcher instances. In turn,
// this avoids ending up with O(N) listeners for the request and O(N^2)
// dispatched events.
const eventWatcher = requestWatcher(testCase, cursorRequest);
while (true) {
const event = await eventWatcher.wait_for('success');
const cursor = event.target.result;
if (cursor === null)
return;
callback(cursor);
cursor.continue();
}
}
// Returns equivalent information to getAllKeys() by iterating a cursor.
//
// Returns an array with one dictionary per entry in the source. The dictionary
// has the properties "key" and "primaryKey".
async function getAllKeysViaCursor(testCase, cursorSource) {
const results = [];
await iterateCursor(testCase, cursorSource.openKeyCursor(), cursor => {
results.push({ key: cursor.key, primaryKey: cursor.primaryKey });
});
return results;
}
// Returns equivalent information to getAll() by iterating a cursor.
//
// Returns an array with one dictionary per entry in the source. The dictionary
// has the properties "key", "primaryKey" and "value".
async function getAllViaCursor(testCase, cursorSource) {
const results = [];
await iterateCursor(testCase, cursorSource.openCursor(), cursor => {
results.push({
key: cursor.key,
primaryKey: cursor.primaryKey,
value: cursor.value,
});
});
return results;
}