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<script>
// 5 MB is larger than default WAL auto-checkpoint limit of 4 MB.
const ROW_SIZE = 5 << 20;
function openIDBAsync() {
return new Promise((resolve, reject) => {
let req = indexedDB.open('test-wal-checkpoint');
req.onupgradeneeded = e => e.target.result.createObjectStore('objects');
req.onsuccess = e => resolve(e.target.result);
req.onerror = reject;
});
}
// This creates a hanging cursor that doesn't let go of its associated
// read transaction until the next count() call in older WebKits (202137).
function countAsync(db) {
let txn;
let txnPromise = new Promise((resolve, reject) => {
txn = db.transaction('objects', 'readwrite');
[txn.oncomplete, txn.onerror] = [resolve, reject];
});
let reqPromise = new Promise((resolve, reject) => {
let req = txn.objectStore('objects').count(IDBKeyRange.lowerBound(0xff));
[req.onsuccess, req.onerror] = [resolve, reject];
});
return Promise.all([txnPromise, reqPromise]).then(_ => db);
}
function insertRowAsync(db) {
let txn;
let txnPromise = new Promise((resolve, reject) => {
txn = db.transaction('objects', 'readwrite');
[txn.oncomplete, txn.onerror] = [resolve, reject];
});
let reqPromise = new Promise((resolve, reject) => {
let req = txn.objectStore('objects').put(new Int8Array(ROW_SIZE), 0xff);
[req.onsuccess, req.onerror] = [resolve, reject];
});
return Promise.all([txnPromise, reqPromise]).then(_ => db);
}
openIDBAsync()
.then(countAsync)
.then(insertRowAsync)
.then(_ => window.webkit.messageHandlers.testHandler.postMessage('Success'))
.catch(e => window.webkit.messageHandlers.testHandler.postMessage('Failed inserting row: ' + (e?.target?.error || e)))
</script>
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