chromium/third_party/blink/web_tests/external/wpt/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html

<!DOCTYPE HTML>
<html>
<head>
  <title>Media documents: image</title>
  <link rel="author" title="Takayoshi Kochi" href="mailto:[email protected]">
  <link rel="author" title="Michael Ventnor" href="mailto:[email protected]">
  <link rel="author" title="Ms2ger" href="mailto:[email protected]">
  <link rel="help" href="https://html.spec.whatwg.org/multipage/#read-media">
  <script src="/resources/testharness.js"></script>
  <script src="/resources/testharnessreport.js"></script>

<script>
  var t = async_test("The document for a standalone media file should have one child in the body.");

  var imgwin = window.open('/images/blue.png');
  imgwin.onload = t.step_func_done(function() {
    assert_equals(imgwin.opener, window);
    assert_equals(imgwin.document.contentType, "image/png");
    var imgwinChildren = imgwin.document.body.childNodes;
    assert_equals(imgwinChildren.length, 1, "Body of image document has 1 child");
    assert_equals(imgwinChildren[0].nodeName, "IMG", "Only child of body must be an <img> element");
    assert_equals(imgwinChildren[0].namespaceURI, "http://www.w3.org/1999/xhtml",
                  "Only child of body must be an HTML element");
    imgwin.close();
  });
</script>
</head>
<body>
  <div id="log"></div>
</body>
</html>