如何编写RSpec测试以进行简单的PUT更新? [英] How to write an RSpec test for a simple PUT update?

问题描述

我试图巩固我对Rails和BDD工作流程的理解，所以我想通过创建其中一个迷你博客(但使用rspec)来从小处入手.现在，我有一个ArticlesController和Article模型，以及相关的rspec文件. Article非常简单，只有title:string和content:text，ArticlesController是RESTful的-尽管我是为Article亲自编写MCV的，但它与使用脚手架创建它的基本相同.

I'm trying to solidify my understanding of rails and the BDD workflow, so I wanted to start small by creating one of those mini-blogs, but with rspec. Right now I have an ArticlesController and Article model, and associated rspec files. Article is very simple, has just title:string and content:text, and the ArticlesController is RESTful - although I hand wrote the MCV for Article, it's basically the same as if I used a scaffold to create it.

但是，在rspec中为PUT更新编写测试时，我真的不知道我在做什么.我正在使用Factory Girl创建article对象，到目前为止，我的代码如下:

However I don't really know what I'm doing when it comes to writing a test in rspec for the PUT update. I'm using Factory Girl to create the article object, and so far my code looks like:

#factories.rb
FactoryGirl.define do
  factory :article do
  title "a title"
  content "hello world"
end

#articles_controller_spec.rb
before(:each) do
  @article = Factory(:article)
end

describe "PUT 'update/:id'" do
  it "allows an article to be updated" do
    @attr = { :title => "new title", :content => "new content" }
    put :update, :id => @article.id, :article => @attr
    response.should be_successful
  end
end

但是我不断得到:

Failures:
1) ArticlesController PUT 'update/:id' allows an article to be updated
   Failure/Error: response.should be_successful
     expected successful? to return true, got false

我做错了什么?我在使用正确的工具吗?当我运行测试服务器时，New，Edit，Destroy会按照我期望的那样进行所有工作，因此我猜测这是我对RSpec的理解存在的问题.让我知道我是否错-谢谢！

What am I doing wrong? And am I using the right tools? When I run my test server, New, Edit, Destroy all work as I would expect them to, so I'm guessing this is a problem with my understanding of RSpec. Let me know if I'm wrong - thanks!

推荐答案

您忘记了.reload您的@article，而在update操作上，您的响应很可能会执行重定向，所以

You forgot to .reload your @article, and on update action your response most likely perform redirect, so

RSpec 2:

describe "PUT update/:id" do
  let(:attr) do 
    { :title => 'new title', :content => 'new content' }
  end

  before(:each) do
    put :update, :id => @article.id, :article => attr
    @article.reload
  end

  it { response.should redirect_to(@article) }
  it { @article.title.should eql attr[:title] }
  it { @article.content.should eql attr[:content] }
end

Rspec 3:

describe "PUT update/:id" do
  let(:attr) do 
    { :title => 'new title', :content => 'new content' }
  end

  before(:each) do
    put :update, :id => @article.id, :article => attr
    @article.reload
  end

  it { expect(response).to redirect_to(@article) }
  it { expect(@article.title).to eql attr[:title] }
  it { expect(@article.content).to eql attr[:content] }
end

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