public void TestValidateFailRefParameter()
        {
            Store        store         = NakedObjectsFramework.Persistor.Instances <Store>().First();
            Vendor       vendor        = NakedObjectsFramework.Persistor.Instances <Vendor>().First();
            const string actionName    = "CreateNewOrder";
            const string parameterName = "customer";

            string id    = NakedObjectsFramework.GetObjectId(store);
            string value = NakedObjectsFramework.GetObjectId(vendor);

            JsonResult result = controller.ValidateParameter(id, value, actionName, parameterName);

            Assert.AreEqual("Not a suitable type; must be a Customer", result.Data);
        }