RSpec: Assert successful create request without assigns method

Question

I have this code in a create method inside a Rails controller:

if @product.save
  format.html { redirect_to @product, notice: 'Product was successfully created.' }

To test this code, I have this expectation in an RSpec file:

expect(response).to redirect_to(assigns(:product))

Using assigns is deprecated/has been moved to a gem and frankly I don't care if @product or @my_product has been created in the controller. Actually I just want to know if I have been redirected to /products/<some-id>. Is there a (recommended) way to do so?

Answer 1

If you want render new you you'll need add gem 'rails-controller-testing' to your Gemfile.

After read your comments i guess your action #create is look like that:

  def create
    @product = Product.new(product_params)

    respond_to do |format|
      if @product.save
        format.html { redirect_to @product, notice: 'Product was successfully created.' }
        format.json { render :show, status: :created, location: @product }
      else
        format.html { render :new }
        format.json { render json: @product.errors, status: :unprocessable_entity }
      end
    end
  end

You could do a test like that:

  describe 'POST /products' do
    context 'when everithing is ok' do
      it 'returns the product' do
        post products_url, params: { product: { description: 'lorem ipsum', title: 'lorem ipsum' } }

        expect(response).to redirect_to(product_url(Product.last))
      end
    end

    context 'when something worong' do
      it 'redirect to new' do
        post products_url, params: { product: { description: 'lorem ipsum' } }

        expect(response).to render_template(:new)
      end
    end
  end