Question

我正在尝试模仿下面的PriceInspector#get_latest_price来测试OderForm。传递了两个命令，因此，我需要在模拟PriceInspector#get_latest_price时返回两个不同的值。这一切都适用于Supplier模型（ActiveRecord），但我不能在PriceInspector类上运行模拟：

# inside the test / example
expect(Supplier).to receive(:find).and_return(supplier_1) # first call, works
expect(PriceInspector).to receive(:get_latest_price).and_return(price_item_1_supplier_1) # returns nil
expect(Supplier).to receive(:find).and_return(supplier_2) # second call, works
expect(PriceInspector).to receive(:get_latest_price).and_return(price_item_2_supplier_1) # returns nil

class OrderForm
  include ActiveModel::Model

  def initialize(purchaser)
    @purchaser = purchaser
  end  

  def submit(orders)        
    orders.each do |supplier_id, order_items|      
      @supplier = Organization.find(supplier_id.to_i)
      @order_item = OrderItem.save(                    
        price_unit_price: PriceInspector.new(@purchaser).get_latest_price.price_unit_price
      )
      [...]
    end
  end
end

class PriceInspector
  def initialize(purchaser)
    @purchaser = purchaser    
  end

  def get_latest_price
    [...]
  end
end

修改

以下是基于Bogieman答案的更新测试代码：

before(:each) do        
  expect(Organization).to receive(:find).and_return(supplier_1, supplier_2)

  price_inspector = PriceInspector.new(purchaser, item_1)
  PriceInspector.stub(:new).and_return price_inspector
  expect(price_inspector).to receive(:get_latest_price).and_return(price_item_1_supplier_1)  
  expect(price_inspector).to receive(:get_latest_price).and_return(price_item_2_supplier_2)                
end

it "saves correct price_unit_price for first OrderItem", :focus do        
  order_form.submit(params)
  expect(OrderItem.first.price_unit_price).to be_within(0.01).of(price_item_1_supplier_1.price_unit_price)  
end

Answer 1

我认为这应该解决实例方法问题，并允许您检查两个不同的退货（假设您传入购买者或双人）：

price_inspector = PriceInspector.new(purchaser)
PriceInspector.stub(:new).and_return price_inspector

expect(price_inspector).to receive(:get_latest_price).and_return(price_item_1_supplier_1)
expect(price_inspector).to receive(:get_latest_price).and_return(price_item_2_supplier_1)

RSpec：模拟不能用于例如方法和多个调用

1 个答案: