third_party/web_platform_tests/navigation-timing/test_timing_reload.html

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8" />
        <title>window.performance.timing attributes after a reloaded navigation</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
        <link rel="help" href="http://www.w3.org/TR/navigation-timing/#sec-navigation-timing-interface"/>
        <script src="/resources/testharness.js"></script>
        <script src="/resources/testharnessreport.js"></script>
        <script src="resources/webperftestharness.js"></script>
        <link rel="stylesheet" href="/resources/testharness.css" />
        <script>
            setup({explicit_done: true});

            // explicitly test the namespace before we start testing
            test_namespace('navigation');

            var reload_frame;
            var initial_timing;

            function onload_test()
            {
                reload_frame = document.getElementById("frameContext");

                if (reload_frame.contentWindow.performance === undefined)
                {
                    // avoid script errors
                    done();
                    return;
                }

                reload_frame.onload = do_test;

                // save frame's initial timings
                initial_timing = {};
                var timing = reload_frame.contentWindow.performance.timing;

                for (var i = 0; i < timingAttributes.length; ++i)
                {
                    var property = timingAttributes[i];
                    initial_timing[property] = timing[property];
                }

                setTimeout("reload_the_frame();", 100);
            }

            function reload_the_frame()
            {
                reload_frame.contentWindow.location.reload(true);
            }

            function do_test()
            {
                reload_frame.onload = "";

                // ensure the frame reloaded
                test_equals(reload_frame.contentWindow.performance.navigation.type,
                            performanceNamespace.navigation.TYPE_RELOAD,
                            "window.performance.navigation.type == TYPE_RELOAD", {help:"http://www.w3.org/TR/navigation-timing/#sec-navigation-info-interface"});

                // ensure reload timings changed
                var timing = reload_frame.contentWindow.performance.timing;
                for (var i = 0; i < timingAttributes.length; ++i)
                {
                    var property = timingAttributes[i];

                    // ignore any timings that were zero initially
                    if (initial_timing[property] !== 0)
                    {
                        test_not_equals(timing[property], initial_timing[property],
                                property + " is different after the reload.");
                    }
                }

                done();
            }
        </script>
    </head>
    <body onload="onload_test();">
        <h1>Description</h1>
        <p>This test validates that the window.performance.timing attributes change when a page is reloaded.</p>

        <p>This page should be loaded with a green background frame below.  The frame will be automatically reloaded
        and then verified that the window.performance.timing attributes have been updated to the new reloaded navigation timings.</p>

        <div id="log"></div>
        <br />
        <iframe id="frameContext" src="resources/blank_page_green.html" style="width: 250px; height: 250px;"></iframe>

    </body>
</html>