Testing a create action with rspec and factory is failing

Question

I'm trying to test a post/create controller action in my rails 4 app, but it's failing.

Here is the scaffold generated test:

it "assigns a newly created project as @project" do
  post :create, {:project => valid_attributes}, valid_session
  assigns(:project).should be_a(Project)
  assigns(:project).should 
end

Here is the code after I refactored to use it with FactoryGirl

  it "assigns a newly created project as @project" do
    project = FactoryGirl.create(:post)
    assigns(project).should be_a(Project)
    assigns(project).should be_persisted
  end

So it's failing:

 Failure/Error: assigns(project).should be_a(Project)
   expected nil to be a kind of Project(id: integer, title: string, description: text, created_at: datetime, updated_at: datetime)

I don't know why projectis returning nil in assigns method. I already inspected it to make sure it's returning a proper Project.

Btw, here is my project factory:

factory :project do
  title "MyString"
  description "MyText"
  users {[FactoryGirl.create(:user)]}
end

Thanks in advance!

Peter Alfvin · Accepted Answer · 2013-11-16 19:08:36Z

1

The assigns(project) method call returns the value of the @project instance variable in Rails. Invoking the FactoryGirl method has no effect on this variable, so it evaluates to nil.

answered Nov 16, 2013 at 19:08

Peter Alfvin

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2 Comments

Bernardo Over a year ago

So I'm supposed to extract my factory's attributes to use in valid_attributes?

Peter Alfvin Over a year ago

Sort of. You don't need to create an instance and then "extract" them, you can just call FactoryGirl.attributes_for(..). I just noticed, though, that in your attempt to use FactoryGirl you passed in :post. Did you mean to do that rather than passing in :project? I would think you'd want post :create, {:project => FactoryGirl.attributes_for(:project)}, valid_session

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