public function test_accessors()
 {
     /** === Test Data === */
     $CODE = 'code';
     $EXP_DATE = 'expired at';
     $ID = 'id';
     /** === Call and asserts  === */
     $this->obj->setCode($CODE);
     $this->obj->setExpDate($EXP_DATE);
     $this->obj->setId($ID);
     $this->assertEquals($CODE, $this->obj->getCode());
     $this->assertEquals($EXP_DATE, $this->obj->getExpDate());
     $this->assertEquals($ID, $this->obj->getId());
 }