考虑以下集成测试：

test "if there is no user in session,redirect to index and flash message" do
  open_session do |sess|
    post '/login',:email => users(:client).email,:password => 'rumpelstiltskin'
    sess[:user] = nil
    get '/user_page'
    assert_redirected_to index_path
    assert_equal "Your session has expired. Please log in again",flash[:notice]
  end    
end

@H_404_4@这会产生错误：undefined method'[] =’

@H_404_4@而且,更改为sess.session [：user] = nil也会生成错误：NoMethodError：未定义的方法“session”为nil：NilClass

@H_404_4@如何从Rails中的集成测试修改会话参数？

@H_404_4@在Rails 3.0.7中工作,Ruby 1.9.2p180,单元测试框架.

@H_404_4@编辑：
get’/ user_page’,nil,{：user => nil}和get(‘/ user_page’,{：user => nil})生成错误.

# Hit the root_path to start our session
get root_path

# A helper method to set our session
login_as(@user_fixture)

# Now we can access the session variable
assert session[:user_id]