不能滿足RSpec的

Question

我有這樣的RSpec代碼：

let(:valid_attributes) { 
    {name: "Sample Product"} 
    } 

    describe "#index" do 
    it "should give a collection of products" do 
     product = Product.create! valid_attributes 
     get :index, :format => :json 
     expect(response.status).to eq(200) 
     expect(response).to render_template("api/products/index") 
     expect(assigns(:products)).to eq([product]) 
    end 
    end 

而且它的控制器：

def index 
    @products = Product.all 
end 

但控制器代碼仍然不滿足規範。這裏有什麼問題。

這裏是失敗消息：

Failures:

1) Api::ProductsController#index should give a collection of products Failure/Error: expect(assigns(:products)).to eq([product])

expected: [#<Product id: 3, name: "Sample Product", created_at: "2016-06-15 05:10:50", updated_at: "2016-06-15 05:10:50">] 
     got: nil 

    (compared using ==) 
# ./spec/controllers/api/products_controller_spec.rb:53:in `block (3 levels) in <top (required)>' 

Finished in 0.05106 seconds (files took 1.89 seconds to load) 1 example, 1 failure

Answer 1

您有：

get :index, :format => :json 

我想你應該有：

get :index, :format => :html 

默認情況下，軌道返回HTML，你沒在您的index操作中未指定。該實例變量被設置

和products應該在數據庫（使用let!（與爆炸）它）創建

Answer 2

• assign檢查，則：

在你的控制器

：

def index 
    @products = Product.all # `@products` should be present 
end 

in rspec：

let(:valid_attributes) {{ name: 'Sample Product' }} 
let!(:product) { Product.create!(valid_attributes) } # use `!` here 

describe "#index" do 
    before { get :index, format :json } 

    it 'should give a collection of products' do 
    expect(assigns(:products)).to eq([product]) 
    end 
end