PASS Create headers giving an array having one string as init argument PASS Create headers giving an array having three strings as init argument PASS Create headers giving bad header name as init argument PASS Create headers giving bad header value as init argument PASS Check headers get with an invalid name invalidĀ PASS Check headers get with an invalid name [object Object] PASS Check headers delete with an invalid name invalidĀ PASS Check headers delete with an invalid name [object Object] PASS Check headers has with an invalid name invalidĀ PASS Check headers has with an invalid name [object Object] PASS Check headers set with an invalid name invalidĀ PASS Check headers set with an invalid name [object Object] PASS Check headers set with an invalid value invalidĀ PASS Check headers append with an invalid name invalidĀ PASS Check headers append with an invalid name [object Object] PASS Check headers append with an invalid value invalidĀ PASS Headers forEach throws if argument is not callable PASS Headers forEach loop should stop if callback is throwing exception