How to unit test #Secured in Spring Security - spring-security

Question

Basically I was trying to unit test on #Secured feature in my application. Below is the code snippet on the secure implementation:
#Service
public class ReportService {
#Secured(value={"ROLE_EMPLOYEE_A"})
public void funcA() {
System.out.println("This only accessible for Employee A.");
}
}
Now I have a series of Employee users define in Spring Security just for my unit test purpose:
<security:global-method-security secured-annotations="enabled"/>
<security:authentication-manager>
<security:authentication-provider>
<security:password-encoder hash="plaintext"/>
<security:user-service>
<security:user name="empl1" password="pass1" authorities="ROLE_EMPLOYEE_A" />
<security:user name="empl2" password="pass2" authorities="ROLE_EMPLOYEE_B" />
</security:user-service>
</security:authentication-provider>
</security:authentication-manager>
In my unit test code, I have the following being define:
#RunWith(SpringJUnit4ClassRunner.class)
#ContextConfiguration(locations = {
"classpath:applicationcontext.xml",
"classpath:securitycontext.xml"
})
public class ReportServiceTest {
#Autowired
private ReportService reportService;
#Test(expected = AccessDeniedException.class)
public void testA() {
assertNotNull(userService);
UserDetails ud = userService.loadUserByUsername("empl2");
assertNotNull(ud);
Authentication auth = new UsernamePasswordAuthenticationToken(ud.getUsername(), ud.getPassword(), ud.getAuthorities());
SecurityContextHolder.getContext().setAuthentication(auth);
reportService.funcA();
}
In this test, I am expecting AccessDeniedException being thrown, but somehow the test were pass and "This only accessible for Employee A." were printed in console output. I'm sure the real execution is working fine, but I'm so curious to know why it doesn't work in unit test?