public async Task TestPutInvalidBrandStockItemAsync()
        {
            // Arrange
            var request = new
            {
                Url  = "/api/StockItem/1",
                Body = new
                {
                    Name  = "Холодильник Юпитер-2",
                    Brand = "xEnwh6aPtenVHKjENaUxojbqMVtecMKZDZ7lo6XsEt3hMX5kuk63Cj4pq32s4xGN530su7sXitfn6FGyngMqNvVX47Mvf2oxQhXMmd9b5vBRDGdZ5GffPAJojjmsErsqeDbrRmTm0KulZNJhiJRvLRUrFnWbSIlc5S7mLvVhyEmVmTVEcwXjifZQVERDyoFjWhNgNpSON",
                    Price = 2000
                }
            };

            // Act
            var putResponse = await _client.PutAsync(request.Url, ContentHelper.GetStringContent(request.Body));

            // Assert
            Assert.True(putResponse.StatusCode == HttpStatusCode.BadRequest);
        }
        public async Task TestPutStockItemAsync()
        {
            // Arrange
            var request = new
            {
                Url  = "/api/StockItem/1",
                Body = new
                {
                    Name  = "Холодильник Юпитер-2",
                    Brand = "Космос",
                    Price = 2000
                }
            };

            // Act
            var putResponse = await _client.PutAsync(request.Url, ContentHelper.GetStringContent(request.Body));

            // Assert
            putResponse.EnsureSuccessStatusCode();
        }
        public async Task TestPutUnExistedStockItemAsync()
        {
            // Arrange
            var request = new
            {
                Url  = $"/api/StockItem/{int.MaxValue}",
                Body = new
                {
                    Name  = "Холодильник Юпитер-2",
                    Brand = "Космос",
                    Price = 2000
                }
            };

            // Act
            var putResponse = await _client.PutAsync(request.Url, ContentHelper.GetStringContent(request.Body));

            // Act
            var errorDetails = JsonConvert.DeserializeObject <ErrorDetails>(await putResponse.Content.ReadAsStringAsync());

            // Assert
            Assert.True(putResponse.StatusCode == HttpStatusCode.InternalServerError && errorDetails != null);
        }