2

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（这似乎是 Hartl 测试分页是否有效的首选方法）出现在几个页面上的分页 div，但是当我添加以下代码时..

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

..它返回..

  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，相同的 Rspec 代码在某些测试中通过而在其他测试中失败（我将在下面突出显示）。div也pagination出现在我浏览器的源代码中，当然它工作正常。

因为它在某些地方而不是其他地方失败，所以我不得不假设这在某种程度上是一个“范围” - 或与相关的分配类型问题will_paginate- 你看，对于失败的测试，分页的内容实际上是“Microposts”的一部分” 控制器，但被测试的页面/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？也有可能我的 FactoryGirl 设置/调用被破坏并且由于某种原因没有触发测试中的分页代码。我是 Rails n00b - 实际上对编程完全陌生 - 所以谢谢你们。:)

（另外，ps，我如何使我的代码在 SO 上变得丰富多彩和漂亮？）

/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（分页在现场工作，测试工作也）

<%= provide(:title, 'All users') %>
<h1>All users</h1>

<%= will_paginate %>

<ul class="users">
  <%= render @users %>
</ul>

<%= will_paginate %>

/app/views/users/show.html.erb（分页在现场工作，测试失败）

<% provide(:title, @user.name) %>
<div class="row">
.
.
.
  <div class="span8">
    <% if @user.microposts.any? %>
      <h3>Microposts (<%= @user.microposts.count %>)</h3>
      <ol class="microposts">
        <%= render @microposts %>
      </ol>
      <%= will_paginate @microposts %> # Here is where I declare that pagination should occur on @microposts, NOT @users
    <% end %>
  </div>
</div>

/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

/宝石文件

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 view testing 相关，但不诚实地理解它（可能是由于语法）.. 它可能有某种关联吗？

4

3 回答 3

6

当您使用：

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

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

尝试创建31个微博而不是 30 个，应该可以通过。

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

编辑：我忘记将 :user 传递给 micropost 工厂，它现在应该可以工作（是我测试中的代码并且它通过了）

于 2012-05-26T20:01:05.493 回答
1

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

"<%= will_paginate %>" 生成带有 的 div 标签class = pagination，但我没有看到任何暗示通过测试的内容'div.pagination'。

我将测试更改为

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

这应该基本上测试同样的事情，这对我来说是通过的。希望这可以帮助！

于 2013-02-06T22:38:33.177 回答
0 
<%= provide (:title, 'All users') %>
<h1>All users</h1>

<div class="pagination">
<%=will_paginate%>
</div>

<ul class="users">
<%=render @users%>
</ul> 

<div class="pagination">
<%= will_paginate %>
</div>
于 2012-10-30T18:00:55.383 回答