<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1275838
-->
<head>
  <title>Test custom elements get function.</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<iframe id="iframe"></iframe>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1275838">Bug 1275838</a>
<script>
const testWindow = iframe.contentDocument.defaultView;
const customElements = testWindow.customElements;

ok('customElements' in testWindow, '"window.customElements" exists');
ok('define' in customElements, '"window.customElements.define" exists');
ok('get' in customElements, '"window.customElements.get" exists');

const name = 'test-get-existing';
class C extends HTMLElement {};
customElements.define(name, C);
is(customElements.get(name), C, 'get() returns the constructor');
is(customElements.get('test-get-not-defined'), undefined,
                      'get() returns undefined for not-defined name');

</script>
</body>
</html>
