|  | <!doctype html> | 
|  | <html> | 
|  | <head> | 
|  | <title>XMLHttpRequest: setRequestHeader() - headers that differ in case</title> | 
|  | <script src="/resources/testharness.js"></script> | 
|  | <script src="/resources/testharnessreport.js"></script> | 
|  | <link rel="help" href="https://xhr.spec.whatwg.org/#the-setrequestheader()-method" data-tested-assertations="/following::ol/li[6] /following::ol/li[7]" /> | 
|  | </head> | 
|  | <body> | 
|  | <div id="log"></div> | 
|  | <script> | 
|  | test(function() { | 
|  | var client = new XMLHttpRequest() | 
|  | client.open("POST", "resources/inspect-headers.py?filter_value=t1, t2, t3", false) | 
|  | client.setRequestHeader("x-test", "t1") | 
|  | client.setRequestHeader("X-TEST", "t2") | 
|  | client.setRequestHeader("X-teST", "t3") | 
|  | client.send(null) | 
|  | assert_equals(client.responseText, "x-test,") | 
|  | }) | 
|  | </script> | 
|  | </body> | 
|  | </html> |