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

rswag-specs/spec/rswag/specs/request_factory_spec.rb

@@ -158,6 +158,17 @@ module Rswag
           end
         end
 
+        context "'formData' parameter" do
+          before do
+            api_metadata[:operation][:parameters] << { name: 'comment', in: :formData, type: 'string' }
+            allow(example).to receive(:comment).and_return('Some comment')
+          end
+
+          it 'returns the example value as a hash' do
+            expect(body).to eq({"comment" => "Some comment"})
+          end
+        end
+
         context "referenced 'body' parameter" do
           before do
             api_metadata[:operation][:parameters] << { '$ref' => '#/parameters/comment' }
@@ -171,6 +182,20 @@ module Rswag
             expect(body).to eq("{\"text\":\"Some comment\"}")
           end
         end
+
+        context "referenced 'formData' parameter" do
+          before do
+            api_metadata[:operation][:parameters] << { '$ref' => '#/parameters/comment' }
+            global_metadata[:parameters] = {
+              'comment' => { name: 'comment', in: :formData, type: 'string' }
+            }
+            allow(example).to receive(:comment).and_return('Some comment')
+          end
+
+          it 'returns the example value as a json string' do
+            expect(body).to eq({"comment" => "Some comment"})
+          end
+        end
       end
 
       describe '#build_headers' do