/**
  * test clear session info
  */
 public function testClearSessionInfo()
 {
     AmfphpAuthentication::addRole('bla');
     AmfphpAuthentication::clearSessionInfo();
     $this->assertFalse(isset($_SESSION[AmfphpAuthentication::SESSION_FIELD_ROLES]));
 }
 /**
  * sign out function
  */
 public function signOut()
 {
     AmfphpAuthentication::clearSessionInfo();
 }