private static void ExecuteAndAssert <T>(T expected, MethodCall <T> methodCall)
        {
            Assert.Equal(expected, methodCall.Execute(mockServiceLocator));

            var methodToJson   = methodCall.ToJson();
            var methodFromJson = MethodCall <T> .FromJson(methodToJson);

            Assert.Equal(expected, methodFromJson.Execute(mockServiceLocator));

            var newtonJson   = JsonConvert.SerializeObject(methodCall);
            var newtonMethod = JsonConvert.DeserializeObject <MethodCall <T> >(newtonJson);

            Assert.Equal(expected, newtonMethod.Execute(mockServiceLocator));
        }