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<!doctype html>
<meta charset=utf-8>
<title>IndexedDB: open and delete requests are processed as a FIFO queue</title>
<link rel="help" href="https://w3c.github.io/IndexedDB/#request-connection-queue">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support.js"></script>
<script>
async_test(t => {
let db_name = 'db' + self.location.pathname + '-' + t.name;
indexedDB.deleteDatabase(db_name);
// Open and hold connection while other requests are queued up.
let r = indexedDB.open(db_name, 1);
r.onerror = t.unreached_func('open should succeed');
r.onsuccess = t.step_func(e => {
let db = r.result;
let saw = expect(t, [
'open1 success',
'open1 versionchange',
'delete1 blocked',
'delete1 success',
'open2 success',
'open2 versionchange',
'delete2 blocked',
'delete2 success'
]);
function open(token, version) {
let r = indexedDB.open(db_name, version);
r.onsuccess = t.step_func(e => {
saw(token + ' success');
let db = r.result;
db.onversionchange = t.step_func(e => {
saw(token + ' versionchange');
setTimeout(t.step_func(() => db.close()), 0);
});
});
r.onblocked = t.step_func(e => saw(token + ' blocked'));
r.onerror = t.unreached_func('open should succeed');
}
function deleteDatabase(token) {
let r = indexedDB.deleteDatabase(db_name);
r.onsuccess = t.step_func(e => saw(token + ' success'));
r.onblocked = t.step_func(e => saw(token + ' blocked'));
r.onerror = t.unreached_func('deleteDatabase should succeed');
}
open('open1', 2);
deleteDatabase('delete1');
open('open2', 3);
deleteDatabase('delete2');
// Now unblock the queue.
db.close();
});
}, 'Opens and deletes are processed in order');
</script>
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