Mark spec pending when using Rack <= 1.6.0.

.gitignore

@@ -30,6 +30,7 @@ pkg
 .yardoc/*
 dist
 Gemfile.lock
+gemfiles/*.lock
 tmp
 
 ## Rubinius

spec/grape/integration/rack_spec.rb

@@ -18,8 +18,14 @@
         'CONTENT_TYPE' => 'application/json'
       }
       env = Rack::MockRequest.env_for('/', options)
+
+      # requires Rack 1.6.0 to pass
+      # can't check explicitly version of Rack because of https://github.com/rack/rack/issues/773
+      pending 'Rack 1.6.0 is required' unless ::Rack.const_defined?(:TempfileReaper) || RUBY_PLATFORM == 'java'
+
       expect(JSON.parse(app.call(env)[2].body.first)['params_keys']).to match_array(%w(route_info test))
     ensure
+      input.close
       input.unlink
     end
   end