<html>
<link rel="import" href="../resources/chai.html" />
<link rel="import" href="../resources/mocha.html" />
<script>
describe('MutationRecord', function() {
  it('should be exposed on window but not constructable', function() {
    assert.ok(window.MutationRecord);
    assert.equal(typeof MutationRecord, "function");
    assert.throw(function() {
        new MutationRecord
    }, TypeError);

    var div = document.createElement('div');
    var observer = new MutationObserver(function(){});
    observer.observe(div, {attributes: true});
    div.id = 'foo';
    var record = observer.takeRecords()[0];
    assert.ok(record instanceof MutationRecord);
  });
});
</script>
</html>