add formData support

rswag-specs/lib/rswag/specs/request_factory.rb

@@ -27,6 +27,7 @@ module Rswag
       end
 
       def build_body(example)
+        return build_form_data(example) if parameters_in(:formData).present?
         body_parameter = parameters_in(:body).first
         body_parameter.nil? ? '' : example.send(body_parameter[:name]).to_json
       end
@@ -93,6 +94,10 @@ module Rswag
           "#{name}=#{value.join(',')}" # csv is default
         end
       end
+
+      def build_form_data(example)
+        Hash[parameters_in(:formData).map { |p| [p[:name][/^\w+[^\[]/, 0], example.send(p[:name][/^\w+[^\[]/, 0])] }]
+      end
     end
   end
 end