Test the required behavior of XMLHttpRequest.getAllResponseHeaders() On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS {state: 0}; headerValues = xhr.getAllResponseHeaders(); did not throw exception. PASS headerValues is the empty string PASS {state: 1}; headerValues = xhr.getAllResponseHeaders(); did not throw exception. PASS headerValues is the empty string PASS getAllResponseHeaders() result is empty in ready state 1. PASS xhr.open("GET", "resources/1251.html", true); did not throw exception. PASS {state: 1}; headerValues = xhr.getAllResponseHeaders(); did not throw exception. PASS headerValues is the empty string PASS xhr.send(null); did not throw exception. PASS {state: 2}; headerValues = xhr.getAllResponseHeaders(); did not throw exception. PASS headerValues is not the empty string PASS Header values appears to be conforming. PASS {state: 3}; headerValues = xhr.getAllResponseHeaders(); did not throw exception. PASS headerValues is not the empty string PASS responseHeaders is savedHeaders PASS {state: 4}; headerValues = xhr.getAllResponseHeaders(); did not throw exception. PASS headerValues is not the empty string PASS responseHeaders is savedHeaders PASS successfullyParsed is true TEST COMPLETE