方法存根于 before(:all)

require './spec/spec_helper'
require './bank'

describe Bank do
  context "#transfer" do
    before(:all) do
      @customer1 = Customer.new(500)
      customer2 = Customer.new(0)
      @customer1.stub(:my_money).and_return(1000)
      customer2.stub(:my_money).and_return(0)
      @transfer_message = Bank.new.transfer(@customer1, customer2, 2000)
    end 

    it "should return insufficient balance if transferred amount is greater than balance" do
      expect(@transfer_message).to eq("Insufficient funds")
    end 

    it "calls my_money" do
      expect(@customer1).to have_received(:my_money)
    end 
  end 
end

当我使用before(:each)反而before(:all)有用。但如果使用before(:all)它会抛出错误undefined method proxy_for for nil:NilClass。我找不到原因。请你帮助我好吗？提前致谢。

聚会迟到了？是的，但我不介意从我的发现中拿出我自己的一分钱。我在尝试存根请求时遇到了类似的错误RSpec.configure块，以便存根仅可用于我传递的示例config.around(:each, option)选项到.

所以，这意味着我在单个示例的范围之外使用了存根，这是不受支持的RSpec::Mocks here https://relishapp.com/rspec/rspec-mocks/docs/basics/scope！.解决方法是在上下文中使用临时作用域。

所以你有了

before(:all) do
  RSpec::Mocks.with_temporary_scope do
    @customer1 = Customer.new(500)
    customer2 = Customer.new(0)
    @customer1.stub(:my_money).and_return(1000)
    customer2.stub(:my_money).and_return(0)
    @transfer_message = Bank.new.transfer(@customer1, customer2, 2000)
  end
end

HTH!