java - How to write Unit test with Mockito -

I have a simple controller, which I want to write a Mokto unit test. Here's the code:

  Personal End User Controller userCtl; Get public string (last model model) {return.userCtl.getLoginForm (model); }   
 This is my test:  
  @ mock private model model; Private DefaultControllerImpl Suite; @ Before public zero setup () {this.ctl = new DefaultControllerImpl (this.userCtl, this.authService, this.org service, this.riskSpaceService); This.ctl.setMessageSource (this.messageSource); } @Test Public Zero TestGate () {Final String View = this.sut.get (this.model); AssertThat (see) .isEqualTo (UserController.LOGIN_PATH); }   
 However, this test always gives blank. How can I go about writing a proper unit test for this controller?   
 
 
 You can not say  what  is  null  But I believe that you do not have any mask, so you have to declare the following runners on your test class:  
  @RunWith (MockitoJUnitRunner.class)   < P> However, I can not see the test. For example you are not asking to return anything  usrCtl  to getLoginForm (...) , so it By default  null  will return - maybe this is the The reason is that you are seeing  null   
  given (userCtl.getLoginForm (model))  
  usrCtl  copy To return, return the value you want:  .willReturn (UserController.LOGIN_PATH);   
 For more information and examples, if you have not already done so, then you should take a look.