third_party/web_platform_tests/page-visibility/test_child_document.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>Page Visibility API Child Document Test</title>

        <script src="/resources/testharness.js"></script>
        <script src="/resources/testharnessreport.js"></script>
        <script type="text/javascript" src="resources/pagevistestharness.js"></script>

        <style type="text/css">
            iframe
            {
                width:250px;
                height:250px;
                margin-left:5px;
            }

            div.docs
            {
                position:relative;
                float:left;
                text-align:center;
                margin:10px;
                border:solid 1px black;
                padding:3px;
            }
        </style>

        <script type="text/javascript" >
            setup({explicit_done: true});

            function onload_test()
            {
                pv_test();

                var frames = document.getElementsByTagName("iframe");
                var doc, doc_name;

                for (var i = 0; i < frames.length; i++)
                {
                    doc = frames[i].contentDocument;
                    doc_name = "IFrame with " + frames[i].id;

                    pv_test(function()
                    {
                        test_feature_exists(doc, " for frame with " + frames[i].id);
                    });

                    test_equals(doc.visibilityState, VISIBILITY_STATES.VISIBLE,
                                "document.visibilityState for frame with " +
                                frames[i].id + " == " +
                                VISIBILITY_STATES.VISIBLE);
                }

                done();
            }
        </script>
    </head>
    <body onload="onload_test()">
        <h1>Description</h1>
        <p>This test validates that, within child documents, all of the Page Visibility API attributes exist,
           are read-only, and match the value of the attributes within the parent document.</p>

        <div id="log"></div>

        <br/>

        <div class="docs">
            IFrame with no style attribute
            <br/>
            <iframe id="no style attribute" src="resources/blank_page_green.html">
                iframes unsupported
            </iframe>
        </div>

        <div class="docs">
            IFrame with "display:none" style<br/>
            <iframe id="'display:none' style" style="display:none"
                    src="resources/blank_page_green.html">
                iframes unsupported
            </iframe>
        </div>

        <div class="docs">
            IFrame with "visibility:hidden" style
            <br/>
            <iframe id="'visibility:hidden' style" style="visibility:hidden"
                    src="resources/blank_page_green.html">
                iframes unsupported
            </iframe>
        </div>
    </body>
</html>