<script src="../../../resources/js-test-pre.js"></script>
<script>
description('State vector should be empty if nothing is saved.');
if (window.internals) {
    var states = internals.formControlStateOfPreviousHistoryItem();
    shouldBe('states.length', '0');
} else {
    debug('Need window.internals.formControlStateOfPreviousHistoryItem().');
}
jsTestIsAsync = true;
finishJSTest();
</script>
<script src="../../../resources/js-test-post.js"></script>