third_party/web_platform_tests/IndexedDB/idbtransaction_abort.htm

<!DOCTYPE html>
<meta charset=utf-8>
<title>IDBTransaction - abort</title>
<link rel="author" href="mailto:odinho@opera.com" title="Odin Hørthe Omdal">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src=support.js></script>

<script>
    var db, aborted,
      t = async_test(document.title, {timeout: 10000}),
      record = { indexedProperty: "bar" };

    var open_rq = createdb(t);
    open_rq.onupgradeneeded = function(e) {
        db = e.target.result;
        var txn = e.target.transaction,
          objStore = db.createObjectStore("store");

        objStore.add(record, 1);
        objStore.add(record, 2);
        var index = objStore.createIndex("index", "indexedProperty", { unique: true });

        assert_true(index instanceof IDBIndex, "IDBIndex");

        e.target.transaction.onabort = t.step_func(function(e) {
            aborted = true;
            assert_equals(e.type, "abort", "event type");
        });

        db.onabort = function(e) {
            assert_true(aborted, "transaction.abort event has fired");
            t.done();
        };

        e.target.transaction.oncomplete = fail(t, "got complete, expected abort");
    };

</script>

<div id=log></div>