ManualTests/open-url-undefined.html - WebKit - Git at Google

 <body>
     <p>
         Tests that <code>window.open()</code> does not interpret the missing URL
         argument as the literal string &ldquo;undefined&rdquo;.
     </p>
     <p>
         Click the Test button. A new window should open. To pass the test, the address
         bar of the new window should be empty. If it contains a URL (ending with &ldquo;undefined&rdquo;), WebKit failed the test.
     </p>
     <button onclick="window.open()">Test</button>
 </body>
	<body>
	<p>
	Tests that <code>window.open()</code> does not interpret the missing URL
	argument as the literal string “undefined”.
	</p>
	<p>
	Click the Test button. A new window should open. To pass the test, the address
	bar of the new window should be empty. If it contains a URL (ending with “undefined”), WebKit failed the test.
	</p>
	<button onclick="window.open()">Test</button>
	</body>