public void TestValidateFailRefProperty()
        {
            Store store  = NakedObjectsFramework.Persistor.Instances <Store>().First();
            Store store1 = NakedObjectsFramework.Persistor.Instances <Store>().OrderBy(x => "").Skip(1).First();

            string       id           = NakedObjectsFramework.GetObjectId(store);
            string       value        = NakedObjectsFramework.GetObjectId(store1);
            const string propertyName = "SalesPerson";

            JsonResult result = controller.ValidateProperty(id, value, propertyName);

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