java - Test a Spring Controller with JUnit that depends of Spring Security -

i have spring application , building junit tests test controller.

the problem inside controller call code:

final authentication authentication = securitycontextholder.getcontext().getauthentication(); final string username = authentication.getname(); 

in other words, need authenticate before calling controller. wrote junit test code:

private mockmvc mockmvc;      @test     public void getpagetest() throws exception{         final processfilecontroller controller = new processfilecontroller();         mockmvc = standalonesetup(controller).build();      mockmvc.perform(get(uri.create("/processfile.html")).sessionattr("freetrialemailaddress", "")).andexpect(view().name("processfile"));         } 

and when run gives me nullpointerexception right on final string username = authentication.getname(); because authentication null since did not login.

the question is: there way mock authentication? ideas welcome.

thank you.

ideally use @authenticationprincipal if isn't option need setup securitycontext authentication instance available in test.

you static method in helper class this.

public static void setupsecuritycontext(string username, string password, string... groups) {   list<grantedauthority> authorities = new arraylist<>();   (string group : groups)   {     authorities.add(new simplegrantedauthority(group));   }    userdetails user = new userdetails(username, password, authorities);   usernamepasswordauthenticationtoken token = new usernamepasswordauthenticationtoken(user, password);   securitycontextholder.getcontext().setauthentication(token); } 

then in test can call

securityhelper.setupsecuritycontext("user", "password", "g1", "g2");