// Finds the DataChunk to resume from.
// Skips required nr of bytes in that chunk.
private async Task <DataChunk> GetResumeDataChunk(
DataChunk dataChunk, FileItem fileItem, int startByteNr)
{
int chunkSize = dataChunk.Data.Count();
if (fileItem.FileSize < dataChunk.Data.Count())
{
dataChunk.Data =
dataChunk.Data.Skip(startByteNr).ToArray();
}
else
{
int indexOfStartChunk = (int)(Math.Floor(
((float)startByteNr / (float)fileItem.FileSize)
* (float)dataChunk.NumberOfChunksInSequence()));
// dataChunk to resume from
dataChunk = await _context.GetDataChunkAtIndex(dataChunk, indexOfStartChunk);
// Skip ahead to start byte in dataChunk
dataChunk.Data = dataChunk.Data.Skip(
startByteNr - indexOfStartChunk * chunkSize).ToArray();
// If we skipped all bytes start resume from the begining of next chunk
if (dataChunk.Data.Count() == 0)
{
dataChunk = await _context.GetNextDataChunk(dataChunk);
}
}
return(dataChunk);
}
public void NumberOfChunksInSequenceReturnsLastNumberInString()
{
// Arrange
DataChunk dataChunk = new DataChunk {
PartName = "test.jpg.part_8.10"
};
// Act
var result = dataChunk.NumberOfChunksInSequence();
// Assert
Assert.Equal(10, result);
}
