失败的测试期望

Failed test expectation

我的应用程序中有一个购物车控制器

class CartsController < ApplicationController
  def show
    @cart = Cart.find(session[:cart_id])
    @products = @cart.products
  end
end

并写了测试 cartscontroller_spec.rb

RSpec.describe CartsController, type: :controller do
  describe 'GET #show' do
    let(:cart_full_of){ create(:cart_with_products, products_count: 3)}
    before do
      get :show
    end
    it { expect(response.status).to eq(200) }
    it { expect(response.headers["Content-Type"]).to eql("text/html; charset=utf-8")}
    it { is_expected.to render_template :show }
    it 'should be products in current cart' do
      expect(assigns(:products)).to eq(cart_full_of.products)
    end
  end
end

我的 factories.rb 看起来是这样的:

factory(:cart) do |f|
  f.factory(:cart_with_products) do
    transient do
      products_count 5
    end
    after(:create) do |cart, evaluator|
      create_list(:product, evaluator.products_count, carts: [cart])
    end
  end
end

factory(:product) do |f|
  f.name('__product__')
  f.description('__well-description__')
  f.price(100500)
end 

但是我有一个错误:

FCartsController GET #show should be products in current cart
Failure/Error: expect(assigns(:products)).to eq(cart_full_of.products)

   expected: #<ActiveRecord::Associations::CollectionProxy [#<Product id: 41, name: "MyProduct", description: "Pro...dDescription", price: 111.0, created_at: "2016-11-24 11:18:43", updated_at: "2016-11-24 11:18:43">]>
        got: #<ActiveRecord::Associations::CollectionProxy []>

看起来我根本没有创建产品,因为产品模型数组为空 ActiveRecord::Associations::CollectionProxy [],同时,我调查产品的 ID 在每次测试时都在增加 attempt.At没有扎实的想法是错误的

创建的 cartid 未分配给您 get :show 的会话。

before do
  session[:cart_id] = cart_full_of.id
  get :show
end

# or

before do
  get :show, session: { cart_id: cart_full_of.id }
end

更新:

控制器中的 find 需要 session[:cart_id] 值,但您的测试没有向控制器请求提供此数据。如果您使用上述代码之一,测试请求会向控制器提供会话。