public async Task CreateWishlist_ExceptionInFileService_ReturnOperationFails()
        {
            //Arrange
            var fileServiceMock  = new Mock <IFilesService>();
            var exceptionMessage = "Directory name is not valid.";

            fileServiceMock
            .Setup(fileService => fileService.CreateDirectoryForWishlist("v...."))
            .Throws(new FileServiceException(exceptionMessage, new ArgumentException(exceptionMessage)));

            wishlistService = new WishlistService(DbContext, fileServiceMock.Object);


            //Act
            var operationResult = await wishlistService.CreateWishlist("TEST", UserId);

            //Assert
            Assert.AreEqual(OperationStatus.ERROR, operationResult.Status);
        }
        public async Task CreateWishlist_ValidParameters_ReturnsOperationResultSuccess()
        {
            var operationResult = await wishlistService.CreateWishlist("TEST", UserId);

            Assert.AreEqual(OperationStatus.SUCCESS, operationResult.Status);
        }