ContactLabel::staffType PHP Method

    public static function staffType()
    {
        if ($site = Site::model()->findByPk(Yii::app()->session['selected_site_id'])) {
            return ($site->institution->short_name ? $site->institution->short_name : $site->institution->name) . ' staff';
        }
        return 'Staff';
    }

 /**
  * @covers ContactLabel::staffType
  */
 public function testStaffType()
 {
     Yii::app()->session['selected_site_id'] = 1;
     $result = $this->model->staffType();
     $expected = 'Moorfields staff';
     $this->assertEquals($expected, $result);
 }