lib/accept_headers/negotiatable.rb in accept_headers-0.0.8 vs lib/accept_headers/negotiatable.rb in accept_headers-0.0.9

@@ -32,19 +32,24 @@
 
     def accept?(other)
       negotiate(other) ? true : false
     end
 
+    def to_s
+      list.join(',')
+    end
+
     private
     def no_header
       raise NotImplementedError.new("#no_header is not implemented")
     end
 
     def parse_item(entry)
       raise NotImplementedError.new("#parse_item(entry) is not implemented")
     end
 
     def parse(header, &block)
+      return no_header unless header
       header = header.dup
       header.sub!(/\A#{self.class::HEADER_PREFIX}\s*/, '')
       header.strip!
       return no_header if header.empty?
       list = []