ruby on rails - How to write an RSpec test for a simple PUT update?

Question

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.

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

However I keep getting:

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

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!

Answer 1

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