LayoutTests/http/tests/misc/will-send-request-with-client-provided-http-body.html

<p>This tests that the http body set by willSendRequestForFrame is sent.</p>
<pre id="console"></pre>
<script>
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }

    function log(msg)
    {
        document.getElementById('console').appendChild(document.createTextNode(msg + "\n"));
    }

    var xhr1 = new XMLHttpRequest();
    xhr1.onreadystatechange = function () {
        if (xhr1.readyState == 4){
            log("Request body before setWillSendRequestAddsHTTPBody: " + xhr1.responseText);
            testRunner.setWillSendRequestAddsHTTPBody("This body should also be sent");
            
            var xhr2 = new XMLHttpRequest();
            xhr2.onreadystatechange = function () {
                if (xhr2.readyState == 4){
                    log("Request body after setWillSendRequestAddsHTTPBody: " + xhr2.responseText);
                    if (window.testRunner)
                        testRunner.notifyDone();
                }            
            }
            xhr2.open("POST", "resources/post-echo.cgi");
            xhr2.send("This body should not be sent because of setWillSendRequestHTTPBody");
        }
    };
    xhr1.open("POST", "resources/post-echo.cgi");
    xhr1.send("This body should be sent");
</script>