❔ Test file not found case

Hello. How simply and cleanly to test file not found case? I have web api app with two services. One sorts int array and prints to text file and other loads last sorted result.

       public SortingService(IConfiguration configuration)
        {
           _configuration = configuration;
        }

        public async Task<List<SortingDto>> SortingListAsync(int[] numberArray)
        {
            var sortingList = new List<SortingDto>();

           sortingList.Add(BubbleSort(numberArray));
           sortingList.Add(ArraySort(numberArray));
           sortingList.Add(QuickSort(numberArray));

            string sortedArray = string.Join(",", sortingList.First().SortedArray);
            var savePath = SaveTextFile();
            await File.WriteAllTextAsync(savePath, sortedArray);

            return sortingList;
        }

        public async Task<string[]> LoadSortedArrayAsync()
        {
            var loadPath = SaveTextFile();
            if (loadPath == null)
            {
                throw new FileNotFoundException();
            }
            string[] lines = await File.ReadAllLinesAsync(loadPath);
            return lines;
        }

        private string SaveTextFile()
        {
            return _configuration.GetValue<string>("FileLocation:Path") ?? null;
        }

Looks like nothing has happened here. I will mark this as stale and this post will be archived until there is new activity.