LayoutTests/fast/loader/navigate-with-post-to-new-target-after-back-forward-navigation.html - WebKit - Git at Google

 <!-- webkit-test-runner [ UsesBackForwardCache=true ] -->
 <!DOCTYPE html>
 <html>
 <body>
 <script>

 if (window.testRunner) {
     testRunner.dumpAsText();
     testRunner.waitUntilDone();
 }

 if (location.search == '?third') {
     alert('PASS');
     if (window.testRunner)
         testRunner.notifyDone();
 } else if (self == top) {
     document.write(`<p>This tests navigating via an anchor element with a non-existent target name, which should create a new window.<br>
 WebKit should not hit any assertions and alert "PASS".</p>`);
     const frame = document.createElement('iframe');
     frame.src = '?first';
     let step = 0;
     frame.onload = () => {
         switch (step++) {
         case 0:
             setTimeout(() => frame.src = '?second', 0);
             break;
         case 1:
             setTimeout(() => history.back(), 0);
             break;
         }
     }
     document.body.appendChild(frame);
 } else {
     if (location.search == '?first') {
         if (localStorage.getItem('loaded')) {
             localStorage.removeItem('loaded');
             window.onload = () => {
                 setTimeout(() => document.querySelector('form').submit(), 0);
             }
         } else
             localStorage.setItem('loaded', 'true');
     }
     document.write(location.search);
     document.write(` <form action="?third" method="post" target="unknownTarget"><input type="text" name="query"><input type="submit"></a>`);
 }

 </script>
 </body>
 </html>
	<!-- webkit-test-runner [ UsesBackForwardCache=true ] -->
	<!DOCTYPE html>
	<html>
	<body>
	<script>

	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	}

	if (location.search == '?third') {
	alert('PASS');
	if (window.testRunner)
	testRunner.notifyDone();
	} else if (self == top) {
	document.write(`<p>This tests navigating via an anchor element with a non-existent target name, which should create a new window.<br>
	WebKit should not hit any assertions and alert "PASS".</p>`);
	const frame = document.createElement('iframe');
	frame.src = '?first';
	let step = 0;
	frame.onload = () => {
	switch (step++) {
	case 0:
	setTimeout(() => frame.src = '?second', 0);
	break;
	case 1:
	setTimeout(() => history.back(), 0);
	break;
	}
	}
	document.body.appendChild(frame);
	} else {
	if (location.search == '?first') {
	if (localStorage.getItem('loaded')) {
	localStorage.removeItem('loaded');
	window.onload = () => {
	setTimeout(() => document.querySelector('form').submit(), 0);
	}
	} else
	localStorage.setItem('loaded', 'true');
	}
	document.write(location.search);
	document.write(` <form action="?third" method="post" target="unknownTarget"><input type="text" name="query"><input type="submit"></a>`);
	}

	</script>
	</body>
	</html>