lib/swagalicious/example_helpers.rb in swagalicious-0.5.1 vs lib/swagalicious/example_helpers.rb in swagalicious-0.5.2

@@ -18,10 +18,16 @@
         @headers = {}
       end
     end
 
     def app
-      @app ||= defined?(Rails) ? Rails.application : Rack::Builder.parse_file("config.ru").first
+      @app ||= if defined?(Rails)
+                 Rails.application
+               elsif Rack::RELEASE >= "3.0.0"
+                 Rack::Builder.parse_file("config.ru")
+               else
+                 Rack::Builder.parse_file("config.ru").first
+               end
     end
 
     def client
       @client ||= Faraday.new do |b|
         b.adapter Faraday::Adapter::Rack, app