ruby-on-rails-3 - 使用 RSpec 测试嵌套资源控制器 - 计数不会改变 1

Question

我有嵌套资源：

resources :portfolios do
  resources :asset_actions
end

并遵循 RSpec 控制器：asset_actions_controller_spec.rb

before(:each) do
  @portfolio = Factory(:portfolio)
end

describe "POST create" do
  describe "with valid params" do
    it "creates a new AssetAction" do
      expect {
        post :create, :asset_action => valid_attributes, :portfolio_id => @portfolio.id
        #@portfolio.asset_actions.create! valid_attributes #WORKS correctly, but this is Model
      }.to change(@portfolio.asset_actions, :count).by(1)
    end
  end
end

运行 Spec 时出现以下错误：

Failure/Error: expect {
   count should have been changed by 1, but was changed by 0

我找不到这次失败的原因。有什么建议么？

注释： Rails 3.1.3、Ruby 1.9.3p5、RSpec 2.8.0

Answer 1

我认为问题在于它@portfolio没有改变，因为它是一个局部变量。它存储在内存中，并且您已对数据库进行了更改。因此，您需要重新加载@portfolio才能看到它的变化。尝试这样的事情：

describe "POST create" do
  describe "with valid params" do
    it "creates a new AssetAction" do
      post :create, :asset_action => valid_attributes, :portfolio_id => @portfolio.id

      expect { @portfolio.reload }.to change(@portfolio.asset_actions, :count).by(1)
    end
  end
end