<!DOCTYPE html>
<html>
<head>
<script src="../../../resources/js-test-pre.js"></script>
</head>
<body>
<keygen id="keys" />
<p id="peas" />
<pre id="console">
This tests that layout tests can access shadow DOM.

</pre>
<script>
if (window.internals) {
    // Make assertions about a built-in shadow
    var keygen = document.getElementById('keys');
    var shadow = internals.shadowRoot(keygen);
    shouldBe('shadow.nodeName', '"#document-fragment"');

    // Shadow roots aren't elements, so accessing their shadow should
    // raise
    var exceptionCode;
    try {
        internals.shadowRoot(shadow);
    } catch (e) {
        exceptionCode = e.code;
    }
    shouldBe('exceptionCode', 'DOMException.INVALID_ACCESS_ERR');

    // Ordinary element should not have shadow
    var p = document.getElementById('peas');
    shouldBe('internals.shadowRoot(p)', 'null');

    // Can bless ordinary elements with shadows
    shadow = internals.ensureShadowRoot(p);
    shouldBe('shadow.nodeName', '"#document-fragment"');
    shouldBe('shadow === internals.shadowRoot(p)', 'true');
}
</script>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>