| <!doctype html> | 
 | <html> | 
 |   <head> | 
 |     <title>XMLHttpRequest: open() after setRequestHeader()</title> | 
 |     <script src="/resources/testharness.js"></script> | 
 |     <script src="/resources/testharnessreport.js"></script> | 
 |     <link rel="help" href="https://xhr.spec.whatwg.org/#the-open()-method" data-tested-assertations="following::ol/li[14]/ul/li[4]" /> | 
 |  | 
 |   </head> | 
 |   <body> | 
 |     <div id="log"></div> | 
 |     <script> | 
 |       var test = async_test() | 
 |       test.step(function() { | 
 |         var client = new XMLHttpRequest() | 
 |         client.onreadystatechange = function() { | 
 |           test.step(function() { | 
 |             if(client.readyState === 4){ | 
 |               assert_equals(client.responseText, '') | 
 |               test.done() | 
 |             } | 
 |           }) | 
 |         } | 
 |         client.open("GET", "resources/inspect-headers.py?filter_name=X-foo") | 
 |         assert_equals(client.readyState, 1) | 
 |         client.setRequestHeader('X-foo', 'bar') | 
 |         client.open("GET", "resources/inspect-headers.py?filter_name=X-foo") | 
 |         assert_equals(client.readyState, 1) | 
 |         client.send() | 
 |       }) | 
 |     </script> | 
 |   </body> | 
 | </html> |