LayoutTests/fast/forms/select-change-size-during-focus.html - WebKit - Git at Google

 <html>
     <head>
         <script>
             function setup() {
                 if (window.testRunner) {
                     window.testRunner.dumpAsText();
                     window.testRunner.waitUntilDone();
                 }

                 s = document.getElementById("select");

                 s.addEventListener("focus", function() {
                     s.size = 1;

                     window.setTimeout(function() {
                         if (window.testRunner)
                             window.testRunner.notifyDone();
                     }, 0);
                 });

                 ev = document.createEvent("MouseEvent");
                 ev.initMouseEvent("mousedown", true, true, window, 0, 0, 0, 20, 20, false, false, false, false, 0, null);
                 s.dispatchEvent(ev);
             }
         </script>
     </head>
     <body onload="setup()">
         <p>
             WebKit bug #<a href="https://bugs.webkit.org/show_bug.cgi?id=131566">131566</a>: Assertion failure changing select element size during focus event dispatch. This test passes if it does not assert in a debug build.
         </p>
         <select id="select" size="2">
             <option>option 1</option>
             <option>option 2</option>
         </select>
     </body>
 </html>
	<html>
	<head>
	<script>
	function setup() {
	if (window.testRunner) {
	window.testRunner.dumpAsText();
	window.testRunner.waitUntilDone();
	}

	s = document.getElementById("select");

	s.addEventListener("focus", function() {
	s.size = 1;

	window.setTimeout(function() {
	if (window.testRunner)
	window.testRunner.notifyDone();
	}, 0);
	});

	ev = document.createEvent("MouseEvent");
	ev.initMouseEvent("mousedown", true, true, window, 0, 0, 0, 20, 20, false, false, false, false, 0, null);
	s.dispatchEvent(ev);
	}
	</script>
	</head>
	<body onload="setup()">
	<p>
	WebKit bug #<a href="https://bugs.webkit.org/show_bug.cgi?id=131566">131566</a>: Assertion failure changing select element size during focus event dispatch. This test passes if it does not assert in a debug build.
	</p>
	<select id="select" size="2">
	<option>option 1</option>
	<option>option 2</option>
	</select>
	</body>
	</html>