如何测试double，mock或stub控制器端对象(How to test double, mock or stub controller side object)

 我正在编写一个控制器测试，我想验证Controller1的call_dashboard_function。 
 
class Controller1 < ApplicationController 
  before_action :init_dashb

  def call_dashboard_function
     @dashb.do_something!
  end 

  def init_dashb
    @dashb ||= Dashboard.new(current_user)
  end 
end 

class Dashboard
  #... this is a facade class
end 
 
 实际测试： 
 
  test "should do something" do 
    sign_in @user
    patch :call_dashboard_function
  end 
 
 问题是我不想测试仪表板类，因为我有一个单独的测试。 所以我想模拟，存根等等这类行为 
 
 如果我从外面访问，那将很容易。 但我无法从控制器外部看到仪表板类。 

I'm writing a controller test, and I wanted to verify Controller1's call_dashboard_function.
 
class Controller1 < ApplicationController 
  before_action :init_dashb

  def call_dashboard_function
     @dashb.do_something!
  end 

  def init_dashb
    @dashb ||= Dashboard.new(current_user)
  end 
end 

class Dashboard
  #... this is a facade class
end 
 
Actual test:
 
  test "should do something" do 
    sign_in @user
    patch :call_dashboard_function
  end 
 
The problem is I don't want to test the dashboard class, since I have a separated test for it. So I'd like to mock, stub, etc this class behavior
 
That would be easy if I had access from outside. But I can't see dashboard class from outside the controller.

原文：https://stackoverflow.com/questions/40708887