public function testRoles()
 {
     $member = new User();
     $identity = new AuthenticatedIdentity($member);
     $this->assertSame('member', $identity->getRoleId());
     $admin = new User();
     $admin->setIsAdministrator(true);
     $identity = new AuthenticatedIdentity($admin);
     $this->assertSame('admin', $identity->getRoleId());
 }