Experiment with headers in response params

lib/active_merchant/billing/gateways/adyen.rb

@@ -755,18 +755,28 @@ def add_metadata(post, options = {})
         post[:metadata].merge!(options[:metadata]) if options[:metadata]
       end
 
-      def parse(body)
+      def parse(response)
+        body = response.body
         return {} if body.blank?
 
-        JSON.parse(body)
+        JSON.parse(body).merge(response.each_header.to_h)
+      end
+
+      def handle_response(response)
+        case response.code.to_i
+        when 200...300
+          response
+        else
+          raise ResponseError.new(response)
+        end
       end
 
       def commit(action, parameters, options)
         begin
           raw_response = ssl_post(url(action), post_data(action, parameters), request_headers(options))
           response = parse(raw_response)
         rescue ResponseError => e
-          raw_response = e.response.body
+          raw_response = e.response
           response = parse(raw_response)
         end
 

test/remote/gateways/remote_adyen_test.rb

@@ -192,6 +192,13 @@ def test_successful_authorize
     assert_equal 'Authorised', response.message
   end
 
+  def test_headers_in_response
+    response = @gateway.authorize(@amount, @credit_card, @options)
+    assert_success response
+    assert_equal 'Authorised', response.message
+    refute response.params['content-type'].blank?
+  end
+
   def test_successful_authorize_with_bank_account
     response = @gateway.authorize(@amount, @bank_account, @options)
     assert_success response