recycle!

# File actionpack/lib/action_controller/test_case.rb, line 173
    def recycle!
      @formats = nil
      @env.delete_if { |k, v| k =~ /^(action_dispatch|rack)\.request/ }
      @env.delete_if { |k, v| k =~ /^action_dispatch\.rescue/ }
      @symbolized_path_params = nil
      @method = @request_method = nil
      @fullpath = @ip = @remote_ip = nil
      @env['action_dispatch.request.query_parameters'] = {}
    end