Question

我有以下帮助方法（app / helpers / application_helper.rb）：

module ApplicationHelper

 #Return a title on a per-page basis
 def title
   base_title = "Ruby on Rails Tutorial Sample App"
   if @title.nil?
     base_title
   else
     "#{base_title} | #{@title}"
   end
 end
end

这里是erb（app / views / layouts / application.html.erb）：

<!DOCTYPE html>
<html>
  <head>
    <title><%= title %></title>
    <%= csrf_meta_tag %>
  </head>
  <body>
    <%= yield %>
  </body>
</html>

我运行了一个rspec测试，看看这个帮助方法是否有效，似乎找不到标题。

以下是错误消息：

Failures:

  1) PagesController GET 'home' should be successful
     Failure/Error: get 'home'
     ActionView::Template::Error:
       undefined local variable or method `title' for #<#<Class:0x991ecb4>:0x991315c>
     # ./app/views/layouts/application.html.erb:4:in `_app_views_layouts_application_html_erb__248109341_80250010__979063050'
     # ./spec/controllers/pages_controller_spec.rb:8:in `block (3 levels) in <top (required)>'

  2) PagesController GET 'home' should have the right title
     Failure/Error: get 'home'
     ActionView::Template::Error:
       undefined local variable or method `title' for #<#<Class:0x991ecb4>:0x9d7d094>
     # ./app/views/layouts/application.html.erb:4:in `_app_views_layouts_application_html_erb__248109341_82566280__979063050'
     # ./spec/controllers/pages_controller_spec.rb:13:in `block (3 levels) in <top (required)>'

谁能告诉我我做错了什么？

更新

我通过执行以下操作来包含帮助程序：

 describe PagesController do
      include ApplicationHelper
      render_views

      describe "GET 'home'" do
        it "should be successful" do
          get 'home'
          response.should be_success
        end

       it "should have the right title" do
      get 'home'
      response.should have_selector("title",
                        :content => "Ruby on Rails Tutorial Sample App | Home")
    end
  end


//and some more

但是我仍然遇到同样的错误

Answer 1

在您的视图中，默认情况下不包括帮助程序。

你可以mock out the helper methods using the template object：

template.should_receive(:title).and_return("Title")

然后，您可以单独测试helpers。

或者，您只需执行以下操作即可在您的视图规范中包含帮助程序：

include ApplicationHelper

修改

describe PagesController do include ApplicationHelper describe "GET 'home'" do it "should be successful" do controller.template.should_receive(:title).and_return("Title") get 'home' response.should be_success end end end

rails中的helper方法问题

1 个答案: