#91 Regression spec for empty field with parameter group

spec/form_params_spec.rb

@@ -29,6 +29,16 @@ class FormParamApi < Grape::API
         {}
       end
 
+      params do
+        requires :required_group, type: Hash do
+          requires :required_param_1
+          requires :required_param_2
+        end
+      end
+      post '/groups' do
+        {}
+      end
+
       add_swagger_documentation
     end
   end
@@ -83,4 +93,33 @@ def app
       ]
     }
   end
+
+  it 'retrieves the documentation for group parameters' do
+    get '/swagger_doc/groups.json'
+
+    JSON.parse(last_response.body).should == {
+      'apiVersion' => '0.1',
+      'swaggerVersion' => '1.2',
+      'resourcePath' => '/groups',
+      'basePath' => 'http://example.org',
+      'produces' => ['application/json'],
+      'apis' => [
+        {
+          'path' => '/groups.{format}',
+          'operations' => [
+            {
+              'notes' => '',
+              'summary' => '',
+              'nickname' => 'POST-groups---format-',
+              'method' => 'POST',
+              'parameters' => [
+                { 'paramType' => 'form', 'name' => 'required_group[required_param_1]', 'description' => nil, 'type' => 'string', 'required' => true, 'allowMultiple' => false },
+                { 'paramType' => 'form', 'name' => 'required_group[required_param_2]', 'description' => nil, 'type' => 'string', 'required' => true, 'allowMultiple' => false }],
+              'type' => 'void'
+            }
+          ]
+        }
+      ]
+    }
+  end
 end