public async Task TestGetStockItemAsync()
        {
            // Arrange
            var dbContext  = DbContextMocker.GetWideWorldImportersDbContext(nameof(TestGetStockItemAsync));
            var controller = new WebAPIController(null, dbContext);
            var id         = 1;

            // Act
            var response = await controller.GetStockItemAsync(id) as ObjectResult;

            var value = response.Value as ISingleResponse <StockItem>;

            dbContext.Dispose();

            // Assert
            Assert.False(value.DidError);
        }