function test_get_code()
 {
     $coupon = new WPSC_Coupon(self::PERCENTAGE_COUPON_ID);
     $exists = $coupon->exists();
     $this->assertTrue($exists);
     if ($exists) {
         $coupon->set('coupon_code', self::PERCENTAGE_COUPON_CODE);
         $coupon->save();
         $coupon->delete_cache();
         $new_coupon = new WPSC_Coupon(self::PERCENTAGE_COUPON_ID);
         $this->assertEquals(self::PERCENTAGE_COUPON_CODE, $new_coupon->get('coupon_code'));
     }
 }