public async Task <DataChunk> GetDataChunkAtIndex(DataChunk dataChunk, int index)
        {
            var partName         = dataChunk.ChunkNameAtIndex(index);
            var dataChunkAtIndex = await _context.DataChunks.FirstOrDefaultAsync(d => d.PartName == partName && d.FileItemId == dataChunk.FileItemId);

            return(dataChunkAtIndex);
        }
        public void ChunkNameAtIndexReturnsPartNameWithIndexPlusOne()
        {
            DataChunk dataChunk = new DataChunk {
                PartName = "test.jpg.part_8.10"
            };
            // Act
            var result = dataChunk.ChunkNameAtIndex(4);

            // Assert
            Assert.Equal("test.jpg.part_5.10", result);
        }