Delete Content-Length. Conten-Type and body on status 204

Should work, but somehow it doesn't...

lib/zero/response.rb

@@ -30,12 +30,18 @@ module Zero
     #
     # @return [Array]
     #
-    def to_a()
+    def to_a
       # TODO Remove content length and body, on certain status codes
-      # Set content length, if not already set
-      content_length unless header.has_key? 'Content-Length'
-      # Set content type, if not already set
-      content_type 'text/html' unless header.has_key? 'Content-Type'
+      if status == 204
+        header.delete('Content-Length')
+        header.delete('Content-Type')
+        body = []
+      else
+        # Set content length, if not already set
+        content_length unless header.has_key? 'Content-Length'
+        # Set content type, if not already set
+        content_type 'text/html' unless header.has_key? 'Content-Type'
+      end
 
       [status, header, body]
     end

spec/unit/response/response_spec.rb

@@ -45,6 +45,17 @@ describe Zero::Response do
 
       value[1]['Content-Type'].should eq('text/html')  # Headers
     end
+
+    it "removes Content-Type, Content-Length and body on status code 204" do
+      subject.body.push '"foobar"'
+      subject.content_type 'application/json'
+      subject.header['Content-Length'] = 8
+
+      subject.status = 204
+      value = subject.to_a
+
+      value[1].should eq({})  # Headers
+    end
   end
 
   describe '#status' do