src/third_party/web_platform_tests/XMLHttpRequest/send-sync-blocks-async.htm - cobalt - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
     <!-- This behaviour is not explicitly spelled out in the spec.
     It does say "queue tasks" under the "if the synchronous flag is unset" header in point 10 of the "send" algorithm.. -->
     <link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following-sibling::ol/li[10]/dl/dd/dl/dd[2]/p[3]" />
     <script src="/resources/testharness.js"></script>
     <script src="/resources/testharnessreport.js"></script>
     <title>XMLHttpRequest: sync requests should block events on pending async requests</title>
 </head>

 <body>
     <div id="log"></div>

     <script type="text/javascript">
         var test = async_test();

         var expect = ['sync 4', 'async 2', 'async 3', 'async 4']
         var actual = []

         test.step(function()
         {
             var xhr_async = new XMLHttpRequest()
             xhr_async.open('GET', 'resources/delay.py?ms=1000', true) // first launch an async request, completes in 1 second
             xhr_async.onreadystatechange = function()
             {
                 test.step(function()
                 {
                      actual.push('async ' + xhr_async.readyState)
                      if(xhr_async.readyState === 4 && actual.indexOf('sync 4')>-1){
                         VerifyResult()
                     }

                 });
             };
             xhr_async.send()

             setTimeout(function(){
                 var xhr_sync = new XMLHttpRequest();
                 xhr_sync.open('GET', 'resources/delay.py?ms=2000', false) // here's a sync request that will take 2 seconds to finish
                 xhr_sync.onreadystatechange = function()
                 {
                     test.step(function()
                     {
                          actual.push('sync ' + xhr_sync.readyState)
                          if(xhr_sync.readyState === 4 && actual.indexOf('async 4')>-1){
                             VerifyResult()
                         }
                     });
                 };
                 xhr_sync.send()

             }, 10);

             function VerifyResult()
             {
                 test.step(function()
                 {
                     assert_array_equals(actual, expect);
                     test.done();
                 });
             };
         });
     </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<!-- This behaviour is not explicitly spelled out in the spec.
	It does say "queue tasks" under the "if the synchronous flag is unset" header in point 10 of the "send" algorithm.. -->
	<link rel="help" href="https://xhr.spec.whatwg.org/#the-send()-method" data-tested-assertations="following-sibling::ol/li[10]/dl/dd/dl/dd[2]/p[3]" />
	<script src="/resources/testharness.js"></script>
	<script src="/resources/testharnessreport.js"></script>
	<title>XMLHttpRequest: sync requests should block events on pending async requests</title>
	</head>

	<body>
	<div id="log"></div>

	<script type="text/javascript">
	var test = async_test();

	var expect = ['sync 4', 'async 2', 'async 3', 'async 4']
	var actual = []

	test.step(function()
	{
	var xhr_async = new XMLHttpRequest()
	xhr_async.open('GET', 'resources/delay.py?ms=1000', true) // first launch an async request, completes in 1 second
	xhr_async.onreadystatechange = function()
	{
	test.step(function()
	{
	actual.push('async ' + xhr_async.readyState)
	if(xhr_async.readyState === 4 && actual.indexOf('sync 4')>-1){
	VerifyResult()
	}

	});
	};
	xhr_async.send()

	setTimeout(function(){
	var xhr_sync = new XMLHttpRequest();
	xhr_sync.open('GET', 'resources/delay.py?ms=2000', false) // here's a sync request that will take 2 seconds to finish
	xhr_sync.onreadystatechange = function()
	{
	test.step(function()
	{
	actual.push('sync ' + xhr_sync.readyState)
	if(xhr_sync.readyState === 4 && actual.indexOf('async 4')>-1){
	VerifyResult()
	}
	});
	};
	xhr_sync.send()

	}, 10);

	function VerifyResult()
	{
	test.step(function()
	{
	assert_array_equals(actual, expect);
	test.done();
	});
	};
	});
	</script>
	</body>
	</html>