public void PutDiff_DataFieldsNotValid_StatusBadRequest()
        {
            // Arange
            var model = new DiffPutModel()
            {
                Data = null
            };

            // Act
            var resultLeft  = _ctrl.PutDiff(1, "left", model).Result.ExecuteAsync(CancellationToken.None);
            var resultRight = _ctrl.PutDiff(1, "right", model).Result.ExecuteAsync(CancellationToken.None);

            // Assert
            var statusCodeLeft  = resultLeft.Result.StatusCode;
            var statusCodeRight = resultRight.Result.StatusCode;

            Assert.IsTrue(statusCodeLeft == HttpStatusCode.BadRequest);
            Assert.IsTrue(statusCodeRight == HttpStatusCode.BadRequest);
        }