LayoutTests/compositing/iframes/iframe-size-to-zero.html - WebKit - Git at Google

 <!DOCTYPE html>

 <html>
 <head>
   <style type="text/css" media="screen">
     iframe {
         border: 10px solid black;
         padding: 5px;
         margin: 20px;
         height: 150px;
         width: 300px;
     }

     .collapsed {
       width: 0;
     }

     .overlay {
       position: absolute;
       width: 50px;
       height: 50px;
       top: 5px;
       left: 5px;
       background-color: rgba(0, 0, 0, 0.2);
     }

   </style>
   <script type="text/javascript" charset="utf-8">
     if (window.testRunner) {
         testRunner.dumpAsText();
         testRunner.waitUntilDone();
     }

     function doTest()
     {
         // For some reason this delay is required for AppKit to not short-circuit the display.
         window.setTimeout(function() {
             if (window.testRunner)
                 testRunner.display();

             var hadLayers = false;
             if (window.testRunner) {
                 var layers = window.internals.layerTreeAsText(document);
                 hadLayers = layers != "";
             }

             document.getElementById('iframe').className = 'collapsed';

             if (window.testRunner) {

                 testRunner.display();
                 var haveLayers = window.internals.layerTreeAsText(document) != "";
                 var result;
                 if (hadLayers && !haveLayers)
                   result = "PASS: had layers, and now do not";
                 else
                   result = "FAIL: layers should have gone. hadLayers = " + hadLayers + ", haveLayers = " + haveLayers;
                 document.getElementById('result').innerHTML = result;
                 testRunner.notifyDone();
             }
         }, 0);
     }

     window.addEventListener('load', doTest, false);
   </script>
 </head>
 <body>

     <!-- The parent document may into compositing mode by the iframe. -->
     <iframe id="iframe" src="resources/composited-subframe.html"></iframe>

     <div class="overlay">
     </div>

     <div id="result">Test only works in DRT</div>
 </body>
 </html>
	<!DOCTYPE html>

	<html>
	<head>
	<style type="text/css" media="screen">
	iframe {
	border: 10px solid black;
	padding: 5px;
	margin: 20px;
	height: 150px;
	width: 300px;
	}

	.collapsed {
	width: 0;
	}

	.overlay {
	position: absolute;
	width: 50px;
	height: 50px;
	top: 5px;
	left: 5px;
	background-color: rgba(0, 0, 0, 0.2);
	}

	</style>
	<script type="text/javascript" charset="utf-8">
	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	}

	function doTest()
	{
	// For some reason this delay is required for AppKit to not short-circuit the display.
	window.setTimeout(function() {
	if (window.testRunner)
	testRunner.display();

	var hadLayers = false;
	if (window.testRunner) {
	var layers = window.internals.layerTreeAsText(document);
	hadLayers = layers != "";
	}

	document.getElementById('iframe').className = 'collapsed';

	if (window.testRunner) {

	testRunner.display();
	var haveLayers = window.internals.layerTreeAsText(document) != "";
	var result;
	if (hadLayers && !haveLayers)
	result = "PASS: had layers, and now do not";
	else
	result = "FAIL: layers should have gone. hadLayers = " + hadLayers + ", haveLayers = " + haveLayers;
	document.getElementById('result').innerHTML = result;
	testRunner.notifyDone();
	}
	}, 0);
	}

	window.addEventListener('load', doTest, false);
	</script>
	</head>
	<body>

	<!-- The parent document may into compositing mode by the iframe. -->
	<iframe id="iframe" src="resources/composited-subframe.html"></iframe>

	<div class="overlay">
	</div>

	<div id="result">Test only works in DRT</div>
	</body>
	</html>