为什么这个简单的销毁方法期望不起作用？

发布于 2024-12-12 01:58:33 字数 1467 浏览 0 评论 0原文

在这里做了一些研究并使用 Google 后，我仍然很困惑为什么这个简单的规范不起作用：

describe CartsController do
  #stuff omitted...
  describe "carts#destroy" do
    it "destroys the requested cart" do
      cart = FactoryGirl.create(:cart)
      puts "Cart count = #{Cart.count}"
      expect {
        delete :destroy, :id => cart.id
      }.to change(Cart, :count).by(-1)
    end
  end
#stuff omitted...
end

这是 CartsController 的操作：

class CartsController < ApplicationController

  def destroy
    @cart = current_cart
    @cart.destroy
    session[:cart_id] = nil

    respond_to do |format|
      format.html { redirect_to(store_url, :notice => 'Your cart is currently empty') }
      format.json { head :ok }
    end
  end

end

最后但并非最不重要的是，我得到的错误：

Cart count = 1
F

Failures:

  1) CartsController carts#destroy destroys the requested cart
     Failure/Error: expect {
       count should have been changed by -1, but was changed by 0
     # ./spec/controllers/carts_controller_spec.rb:146:in `block (3 levels) in <top (required)>'

Finished in 6.68 seconds
1 example, 1 failure

我是 rspec 测试的新手，但是，据我了解，我的销毁规范非常简单，并且应该按预期执行。我不知道我做错了什么。

请帮助我，一如既往地感谢，

编辑..这是 current_cart 方法：

def current_cart
  Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
  cart = Cart.create
  session[:cart_id] = cart.id
  cart
end

原文

After doing some research here, and using Google I'm still confused as to why this simple spec isn't working:

describe CartsController do
  #stuff omitted...
  describe "carts#destroy" do
    it "destroys the requested cart" do
      cart = FactoryGirl.create(:cart)
      puts "Cart count = #{Cart.count}"
      expect {
        delete :destroy, :id => cart.id
      }.to change(Cart, :count).by(-1)
    end
  end
#stuff omitted...
end

Here's the CartsController's action:

class CartsController < ApplicationController

  def destroy
    @cart = current_cart
    @cart.destroy
    session[:cart_id] = nil

    respond_to do |format|
      format.html { redirect_to(store_url, :notice => 'Your cart is currently empty') }
      format.json { head :ok }
    end
  end

end

And last but not least, the error I'm getting:

Cart count = 1
F

Failures:

  1) CartsController carts#destroy destroys the requested cart
     Failure/Error: expect {
       count should have been changed by -1, but was changed by 0
     # ./spec/controllers/carts_controller_spec.rb:146:in `block (3 levels) in <top (required)>'

Finished in 6.68 seconds
1 example, 1 failure

I'm new to rspec tests, however, As far as I understand my destroy spec is very straightforward, and it should perform as expected. I have no idea of what I'm doing wrong..

Please help me,
Thankful as always,

EDIT.. here's the current_cart method:

def current_cart
  Cart.find(session[:cart_id])
rescue ActiveRecord::RecordNotFound
  cart = Cart.create
  session[:cart_id] = cart.id
  cart
end

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骑趴 2024-12-19 01:58:33

根据您提供的内容，我想您应该简单地

session[:cart_id] = cart.id

在 expect 块之前添加：。

为什么？看起来你并没有真正使用 url 中传递的 id，而是存储在 session 中的值。但可以肯定的是，您应该提供 current_cart 方法。

According to what you provide, I guess you should simply add:

session[:cart_id] = cart.id

before your expect block.

Why? It seems you're not really using the id passed in the url but the value stored in session. But to be sure, you should provide your current_cart method.

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