gecko-dev/testing/web-platform/tests/IndexedDB/idbrequest_error.html

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HTML

<!DOCTYPE html>
<meta charset=utf-8>
<title>IDBRequest.error</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=support.js></script>
<script>
async_test(t => {
var open = createdb(t);
open.onupgradeneeded = t.step_func(e => {
var db = e.target.result;
db.createObjectStore('store');
});
open.onsuccess = t.step_func(e => {
var db = e.target.result;
var request = db.transaction('store').objectStore('store').get(0);
assert_equals(request.readyState, 'pending');
assert_throws('InvalidStateError', () => request.error,
'IDBRequest.error should throw if request is pending');
t.done();
});
}, 'IDBRequest.error throws if ready state is pending');
</script>