<!DOCTYPE html>
<script src="../../../resources/js-test.js"></script>
<section id="a" is="x-a"></section>
<script>
description('Tests that type extension of a element whose DOM interface is ' +
            'HTMLElement does not assert');

var u = document.querySelector('#a');
var v = document.createElement('section', 'x-a');

// FIXME: When the 'extends' option is implemented, test registering the
// the Custom Element.

testPassed('did not crash');

var successfullyParsed = true;
</script>