在Rspec中测试控制器的新动作

Question

I'm trying to test my controller's new actin with Rspec but getting the following error:

Failure/Error: expect(assigns(:category)).to be_a_new(Category)
       expected nil to be a new Category(id: integer, title: string, image_url: string, description: string, created_at: datetime, updated_at: datetime)

Here is the code for the test:

describe "GET #new" do
    it "assigns a new category as @category" do
      get :new, params: { }, session: valid_session
      expect(assigns(:category)).to be_a_new(Category)
    end
  end

Categories controller new action:

def new
    @category = Category.new
  end

Using get with the new action opens up a form where a new category can be created.

If anyone could point me in the right direction that would be great.

Thanks.

Answer 1

Try something like this:

describe "GET #new" do
    before(:each) do
      session[:user_id] = valid_session.id #or something like
      get :new
    end

    it "should be success" do
      expect(assigns(:category)).to_not eq nil
      expect(assigns(:category)).to be_a_new(Category)
    end
end

This way you set the session before get :new.