anchor.diff:    1. [Isolated unit tests](#isolated-unit-tests "Unit testing without the Angular testing utilities")
   
     1. [隔离的单元测试](#isolated-unit-tests "Unit testing without the Angular testing utilities")
  -
  +    
  +    - [Services](#isolated-service-tests)
  +    
       - [服务](#isolated-service-tests)
  -
  +    
  +    - [Pipes](#isolated-pipe-tests)
  +    
       - [管道](#isolated-pipe-tests)
  +    
  +    - [Components](#isolated-component-tests)
   
       - [组件](#isolated-component-tests)
   
  
positive.code:   You can and should write isolated unit tests for pipes and services. 
  
    你可以，也应该为服务和管道编写孤立的单元测试。
  
  :marked
    Components can be tested in isolation as well.
  
negative.code: 
      - [_TestBed.get_](#testbed-get)
  
    1. [Test a component with an async service](#component-with-async-service)
  
    1. [测试拥有异步服务的组件](#component-with-async-service)  
  
  