How to write JUnit for Rest Controller

I have written Rest controller as follows:

@RestController

public class RegisterRestController {

@RequestMapping(value = "/create", method = RequestMethod.POST, consumes = "application/json", produces = "application/json")

public RegisterResponseObject createProspect(
        @Valid @RequestBody ProfileBean profileBean) throws Exception {

//If validation passes do something

}

}

Here, if validation fails I am handling exception in Controller advice and sending error object back to client.

How to test this controller with JUnit for validation erros.

Thanks in advance.