stylesheet-and-script-load-order.html

<html>
<head>
    <script>  
        if (window.testRunner)
            testRunner.dumpAsText();
    </script>
    <link rel=stylesheet href="http://127.0.0.1:8000/local/slow-css-pass.cgi">
</head>
<body>
    <p>Test that stylesheet loads complete before external scripts are executed.</p>
    <script src=stylesheet-dependent.js></script>
</body>
</html>

chromium/third_party/blink/web_tests/http/tests/local/stylesheet-and-script-load-order.html