使用Capybara / Rspec使用will_paginate Gem测试视图

做Michael Hartl的Rails教程， 第10章，第5节，练习2 。 我 – 非常简单 – 尝试编写测试以确保使用will_paginate gem在几页上出现分页div（这似乎是Hartl测试分页是否有效的首选方法），但是当我添加以下代码时…

subject { page } . . . it { should have_selector('div.pagination') } 

..it返回..

  1) UserPages profile page Failure/Error: it { should have_selector('div.pagination') } expected css "div.pagination" to return something 

这特别奇怪，因为在这个特定的_spec文件中，这个相同的Rspec代码在一些测试中传递而在其他测试中失败（我将在下面强调这一点）。 pagination div也存在于浏览器的源代码中，当然它工作正常。

因为它在某些地方而不是在其他地方失败，我得假设这是某种“范围” – 或与will_paginate相关的分配类型问题 – 你看，对于失败的测试，被分页的内容实际上是“ Microposts“控制器，但正在测试的页面/视图由”用户“控制器处理。 对于通过测试，视图和控制器都是“用户”。

这可能是问题吗？ 我的FactoryGirl设置/调用也可能被破坏，并且由于某种原因没有在测试中触发分页代码。 我是一个Rails n00b – 实际上是编程的新手 – 所以谢谢你们。 🙂

（另外，ps，我如何让我的代码变得丰富多彩？）

/spec/requests/user_pages_spec.rb

 require 'spec_helper' # Omitted from below - I don't think this is relevant. describe "UserPages" do subject { page } describe "index" do # This is the block where it is PASSING.. let(:user) { FactoryGirl.create(:user) } # I'll include my /spec/factories.rb file below before(:all) { 30.times { FactoryGirl.create(:user) } } after(:all) { User.delete_all } # I'll omit my /app/models/user.rb file - I don't think it's relevant to the problem before do valid_signin user # References /spec/support/utilities.rb to sign in as a valid user, but I will omit this since this is part of the working tests visit users_path # This is /app/views/users/index.html.erb - this is where SUCCESSFUL pagination testing occurs end describe "pagination" do it { should have_selector('div.pagination') } #PASS!! As I would expect . . . end describe "profile page" do let(:user) { FactoryGirl.create(:user) } let!(:m1) { FactoryGirl.create(:micropost, user: user, content: "Awesome")} # Used for other tests let!(:m2) { FactoryGirl.create(:micropost, user: user, content: "Sauce") } # Used for other tests before(:all) { 30.times { FactoryGirl.create(:micropost) } } # Is this constructed properly? Perhaps the posts are not created, and that's why the failure to render the paginate code in test. after(:all) { user.microposts.delete_all } # I have tested with and without this line of code - it fails both ways. before { visit user_path(user) } # /app/views/users/show.html.erb it { should have_selector('div.pagination') } # FAIL!!! This is the line in question that generates the error above. . . . . end 

/app/views/users/index.html.erb （分页在网站上工作，也在测试工作）

  
All users
  
  
  

/app/views/users/show.html.erb （在网站上进行分页，测试失败）

  
 . . . 
  
Microposts ()
 
  
  # Here is where I declare that pagination should occur on @microposts, NOT @users  
  

/spec/requests/factories.rb

 FactoryGirl.define do factory :user do sequence(:name) { |n| "Person #{n}" } sequence(:email) { |n| "person_#{n}@example.com" } password "secret" password_confirmation "secret" factory :admin do admin true end end factory :micropost do content "Lorem ipsum" user end end 

/的Gemfile

 source 'https://rubygems.org' gem 'rails', '3.2.3' gem 'pg', '0.12.2' gem 'bootstrap-sass', '2.0.0' gem 'bcrypt-ruby', '3.0.1' gem 'faker', '1.0.1' gem 'will_paginate', '3.0.3' gem 'bootstrap-will_paginate', '0.0.6' group :development do gem 'guard-rspec', '0.5.5' gem 'annotate', '~> 2.4.1.beta' end # Gems used only for assets and not required # in production environments by default. group :assets do gem 'sass-rails', '3.2.4' gem 'coffee-rails', '3.2.2' gem 'uglifier', '1.2.3' end gem 'jquery-rails', '2.0.0' group :test, :development do gem 'rspec-rails', '2.9.0' end group :test do gem 'capybara', '1.1.2' gem 'rb-fsevent', '0.4.3.1', :require => false gem 'growl', '1.0.3' gem 'guard-spork', '0.3.2' gem 'spork', '0.9.0' gem 'factory_girl_rails', '1.4.0' end 

编辑：发现这篇文章与will_paginate和查看测试有关 ，但是老实说不明白（可能是由于语法）..它可能以某种方式相关吗？

Answer 1

当你使用：

 before(:all) { 30.times { FactoryGirl.create(:user) } } 

您已经创建了一个用户，因此总计数最多为31，因此它分页（默认情况下，使用will_paginate分页显示每页30条记录）。

尝试创建31个微博而不是30个，它应该通过。

 before(:each) { 31.times { FactoryGirl.create(:micropost, user: user) } } 

编辑：我忘了将用户传递给微博工厂，它现在应该工作（是我的测试代码，它通过了）

Answer 2

根据http://thewebfellas.com/blog/2008/8/3/roll-your-own-pagination-links-with-will_paginate

"<%= will_paginate %> ”会生成一个带有class = pagination的div标签，但我没有看到任何暗示要对'div.pagination'传递进行测试'div.pagination' 。

我改变了测试

 it { should have_selector('div', class: 'pagination') } 

这应该基本上测试相同的东西，这传递给我。 希望这可以帮助！

Answer 3

 <%= provide (:title, 'All users') %> 
All users
 
 <%=will_paginate%> 
 
 <%=render @users%> 
 
 <%= will_paginate %>