    # File lib/action_controller/vendor/rack-1.0/rack/mock.rb, line 60
        def request(method="GET", uri="", opts={})
          env = self.class.env_for(uri, opts.merge(:method => method))

          if opts[:lint]
            app = Rack::Lint.new(@app)
          else
            app = @app
          end

          errors = env["rack.errors"]
          MockResponse.new(*(app.call(env) + [errors]))
        end