LayoutTests/http/tests/security/blob-null-url-location-origin.html - WebKit - Git at Google

 <!DOCTYPE html>
 <body>
 <script>
 if (window.testRunner) {
     testRunner.waitUntilDone();
     testRunner.dumpAsText();
     testRunner.setCanOpenWindows();
 }

 let count = 0;
 onmessage = (event) => {
     ++count;
     if (event.data !== "null") {
         document.body.innerHTML = "FAIL, got " + event.data + " with count " + count;
         if (window.testRunner)
             testRunner.notifyDone();
         window.clearTimeout(timer);
         count = 3;
         return;
     }
     if (count === 2) {
         document.body.innerHTML = "PASS";
         if (window.testRunner)
             testRunner.notifyDone();
         window.clearTimeout(timer);
     }
 };

 const timer = setTimeout(() => {
     document.body.innerHTML = "TIMEOUT";
     if (window.testRunner)
         testRunner.notifyDone();
 }, 10000);
 </script>
 <iframe src="data:text/html,<script>console.log('data URL frame loaded'); const blob = new Blob(['<'+ 'script>console.log(\'blob popup loaded\' + location.origin); onload = () => window.opener.postMessage(location.origin, \'*\'); console.log(\'blob popup message posted\'); onmessage = () => window.opener.postMessage(location.origin, \'*\'); <' + '/script>'], {type: 'text/html'}); const blobURL = URL.createObjectURL(blob); const popup = window.open(blobURL); onmessage = (event) => { popup.postMessage('check', '*'); parent.postMessage(event.data, '*'); URL.revokeObjectURL(blobURL); onmessage = (event) => { parent.postMessage(event.data, '*'); popup.close(); }; }; console.log('blob popup opened'); </script>"></iframe>
 </body>
	<!DOCTYPE html>
	<body>
	<script>
	if (window.testRunner) {
	testRunner.waitUntilDone();
	testRunner.dumpAsText();
	testRunner.setCanOpenWindows();
	}

	let count = 0;
	onmessage = (event) => {
	++count;
	if (event.data !== "null") {
	document.body.innerHTML = "FAIL, got " + event.data + " with count " + count;
	if (window.testRunner)
	testRunner.notifyDone();
	window.clearTimeout(timer);
	count = 3;
	return;
	}
	if (count === 2) {
	document.body.innerHTML = "PASS";
	if (window.testRunner)
	testRunner.notifyDone();
	window.clearTimeout(timer);
	}
	};

	const timer = setTimeout(() => {
	document.body.innerHTML = "TIMEOUT";
	if (window.testRunner)
	testRunner.notifyDone();
	}, 10000);
	</script>
	<iframe src="data:text/html,<script>console.log('data URL frame loaded'); const blob = new Blob(['<'+ 'script>console.log(\'blob popup loaded\' + location.origin); onload = () => window.opener.postMessage(location.origin, \'\'); console.log(\'blob popup message posted\'); onmessage = () => window.opener.postMessage(location.origin, \'\'); <' + '/script>'], {type: 'text/html'}); const blobURL = URL.createObjectURL(blob); const popup = window.open(blobURL); onmessage = (event) => { popup.postMessage('check', ''); parent.postMessage(event.data, ''); URL.revokeObjectURL(blobURL); onmessage = (event) => { parent.postMessage(event.data, '*'); popup.close(); }; }; console.log('blob popup opened'); </script>"></iframe>
	</body>