mozilla-central/testing/web-platform/tests/IndexedDB/open-request-queue.any.js (file symbol)

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// META: title=IndexedDB: open and delete request queues
// META: global=window,worker
// META: script=resources/support.js
'use strict';
async_test(t => {
const db_name = 'db' + self.location.pathname + '-' + t.name;
indexedDB.deleteDatabase(db_name);
// Open and hold connection while other requests are queued up.
const r = indexedDB.open(db_name, 1);
r.onerror = t.unreached_func('open should succeed');
r.onsuccess = t.step_func(e => {
const db = r.result;
const saw = expect(t, [
'open1 success', 'open1 versionchange', 'delete1 blocked',
'delete1 success', 'open2 success', 'open2 versionchange',
'delete2 blocked', 'delete2 success'
]);
function open(token, version) {
const r = indexedDB.open(db_name, version);
r.onsuccess = t.step_func(e => {
saw(token + ' success');
const 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) {
const 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();
});
}, 'IndexedDB: open and delete requests are processed as a FIFO queue');