参数数量错误（0 代表 1）(ArgumentError)

Question

我使用 devise 作为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"

对于步骤定义，

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

我还向黄瓜世界添加了 Devise 助手。

World(Devise::Controllers::Helpers)

黄瓜正在生成此错误：

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'

为什么会生成以及如何修复它？

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

在 Devise 中定义的，我通过将此代码 World(Devise::Controllers::Helpers) 写入 cucumber 的路径来将该助手添加到 cucumber .rb 文件。

Answer 1

试试这个

When /^user is not logged in$/ do
  user_signed_in?.should be_false
end

更新
我认为你需要做这样的事情

When /^user is not logged in$/ do |user| 
  #check here user not logged in
end

或者
的功能修改为“然后”

Scenario: Home page has a login page
  Given I am on the home page
  And I am not logged in
  Then I should see "Sign In"

您可以尝试将步骤中

Given /^user is not logged in$/ do
  visit('users/sign_out')  # this will ensure that the user is not logged in
end

Answer 2

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 notlogin 但需要参数的内容吗？