code: @Test public void testConvertRolesToAuthorities() throws Exception {
    Collection<RoleEntity> roles=new ArrayList<RoleEntity>();
    RoleEntity role=new RoleEntity();
    role.setRoleName("admin");
    roles.add(role);
    role=new RoleEntity();
    role.setRoleName("user");
    roles.add(role);
    Collection<GrantedAuthority> authorities=new AuthorizationHelper().convertRolesToAuthorities(roles);
    assertEquals("Wrong number of authorities",2,authorities.size());
    Iterator<GrantedAuthority> iterator=authorities.iterator();
    assertEquals("Wrong authority name","ADMIN",iterator.next().getAuthority());
  }
  