LayoutTests/fast/dom/navigation-with-sideeffects.html - WebKit - Git at Google

 <html>
 <script>
 if (window.testRunner) {
     testRunner.dumpAsText();
     testRunner.waitUntilDone();
 }
 var i = 0;
 function test() {
     try {
         o1 = {
             toString : function () {
                 i++;
                 if (i<50)
                     document.getElementById("testFrame").contentDocument.location = o1;
                 else
                     alert("completed o1.toString()");
                 document.open();
                 return "data:text/plain,o1-" + i;
             }
         }
         o2 = {
             get toString() {
                 i++;
                 if (i<50)
                     document.getElementById("testFrame").contentDocument.location = o2
                 else
                     alert("completed o2.toString");
                 document.open();
                 return function(){ return "data:text/plain,o2-" + i; }
             }
         }

         tmp = document.getElementById("testFrame");
         i = 0;
         tmp.contentDocument.location = o1;
         document.write("<iframe src='about:blank' id='testFrame'/>");
         tmp = document.getElementById("testFrame");
         i = 0;
         tmp.contentDocument.location = o2;
     } finally {
         if (window.testRunner)
             testRunner.notifyDone();
     }
 }
 </script>
 <body id="log" onload="test()">
 <iframe src="about:blank" id="testFrame"/>
 </body>
 </html>
	<html>
	<script>
	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	}
	var i = 0;
	function test() {
	try {
	o1 = {
	toString : function () {
	i++;
	if (i<50)
	document.getElementById("testFrame").contentDocument.location = o1;
	else
	alert("completed o1.toString()");
	document.open();
	return "data:text/plain,o1-" + i;
	}
	}
	o2 = {
	get toString() {
	i++;
	if (i<50)
	document.getElementById("testFrame").contentDocument.location = o2
	else
	alert("completed o2.toString");
	document.open();
	return function(){ return "data:text/plain,o2-" + i; }
	}
	}

	tmp = document.getElementById("testFrame");
	i = 0;
	tmp.contentDocument.location = o1;
	document.write("<iframe src='about:blank' id='testFrame'/>");
	tmp = document.getElementById("testFrame");
	i = 0;
	tmp.contentDocument.location = o2;
	} finally {
	if (window.testRunner)
	testRunner.notifyDone();
	}
	}
	</script>
	<body id="log" onload="test()">
	<iframe src="about:blank" id="testFrame"/>
	</body>
	</html>