LayoutTests/http/tests/xmlhttprequest/send-undefined-and-null.html - WebKit - Git at Google

 <html>
 <body>
 Tests that sending undefined or null results in an empty request body.
 <script>
 if (window.testRunner)
     testRunner.dumpAsText();

 var console_messages = document.createElement("ul");
 document.body.appendChild(console_messages);

 function log(message)
 {
     var item = document.createElement("li");
     item.appendChild(document.createTextNode(message));
     console_messages.appendChild(item);
 }

 xhr = new XMLHttpRequest;
 xhr.open("POST", "resources/post-echo.cgi", false);
 xhr.send(undefined);
 if (!xhr.responseText.length)
     log("PASS for undefined");
 else
     log("FAILED: The posted content when sending 'undefined' is '" + xhr.responseText +"'. It should have been ''.");

 xhr = new XMLHttpRequest;
 xhr.open("POST", "resources/post-echo.cgi", false);
 xhr.send(null);
 if (!xhr.responseText.length)
     log("PASS for null");
 else
     log("FAILED: The posted content when sending 'null' is '" + xhr.responseText +"'. It should have been ''.");
 </script>
 </body>
 </html>
	<html>
	<body>
	Tests that sending undefined or null results in an empty request body.
	<script>
	if (window.testRunner)
	testRunner.dumpAsText();

	var console_messages = document.createElement("ul");
	document.body.appendChild(console_messages);

	function log(message)
	{
	var item = document.createElement("li");
	item.appendChild(document.createTextNode(message));
	console_messages.appendChild(item);
	}

	xhr = new XMLHttpRequest;
	xhr.open("POST", "resources/post-echo.cgi", false);
	xhr.send(undefined);
	if (!xhr.responseText.length)
	log("PASS for undefined");
	else
	log("FAILED: The posted content when sending 'undefined' is '" + xhr.responseText +"'. It should have been ''.");

	xhr = new XMLHttpRequest;
	xhr.open("POST", "resources/post-echo.cgi", false);
	xhr.send(null);
	if (!xhr.responseText.length)
	log("PASS for null");
	else
	log("FAILED: The posted content when sending 'null' is '" + xhr.responseText +"'. It should have been ''.");
	</script>
	</body>
	</html>