参数数量错误（0 代表 1）（ArgumentError）

Question

我devise用作身份验证系统并创建了一个场景。

Scenario: Home page have a login page
    When I go to the home page
    And user is not logged in
    Then I should see "Sign In"

用于步骤定义

When /^user is not logged in$/ do
  signed_in? == false
end

我还在黄瓜世界中添加了设计助手。

World(Devise::Controllers::Helpers)

黄瓜产生了这个错误：

And user is not logged in           # features/step_definitions/web_steps.rb:260
      wrong number of arguments (0 for 1) (ArgumentError)
      ./features/step_definitions/web_steps.rb:261:in `/^user is not logged in$/'
      features/manage_home_page.feature:13:in `And user is not logged in'

为什么会产生它以及如何修复它？

更新

signed_in?方法的定义是

  # Return true if the given scope is signed in session. If no scope given, return
  # true if any scope is signed in. Does not run authentication hooks.
  def signed_in?(scope=nil)
    [ scope || Devise.mappings.keys ].flatten.any? do |scope| 
      warden.authenticate?(:scope => scope)
    end
  end

它在设计中定义，我通过将此代码World(Devise::Controllers::Helpers)写入黄瓜的paths.rb文件将帮助程序添加到黄瓜。

Answer 1

我遇到了与此类似的问题，结果证明测试行与代码中其他位置的另一个步骤定义相匹配。

这里似乎不太可能，但是您还有其他可以匹配And user is not logged in但需要参数的东西吗？