/// <summary>
/// Gets the updated chunks.
/// </summary>
public IEnumerable <DifferenceChunkDto> GetUpdatedChunks(string fileName, IEnumerable <CachedChunkDto> cacheChunks)
{
string downloadFilePath = Path.Combine(CommonConstants.ServerFilesLocation, $"{fileName}");
List <Chunk> chunks = RabinKarpAlgorithm.Slice(File.ReadAllBytes(downloadFilePath));
return(ChunkDifferentiator.GetUpdatedChunks(cacheChunks.Select(CachedChunkDtoMapper.Map).ToList(), chunks).Select(DifferenceChunkDtoMapper.Map));
}
// cache: [0][1][2][3]
// ↓ ↓
// current : [0][1][2]
public void TestCase10()
{
var chunksFromCachedFile = new List <Chunk>
{
new Chunk(Encode("chunk"), 0),
new Chunk(Encode("chunk0"), 1),
new Chunk(Encode("chunk"), 2),
new Chunk(Encode("chunk2"), 3),
};
var chunksFromCurrentFile = new List <Chunk>
{
new Chunk(Encode("chunk0"), 0),
new Chunk(Encode("chunk1"), 1),
new Chunk(Encode("chunk2"), 2)
};
List <DifferenceChunk> differenceChunks =
ChunkDifferentiator.GetUpdatedChunks(chunksFromCachedFile, chunksFromCurrentFile).ToList();
differenceChunks.Count.Should().Be(3);
differenceChunks.ElementAt(0).ChunkInformation.Should().BeEmpty();
differenceChunks.ElementAt(0).CurentFileChunkNumber.Should().Be(0);
differenceChunks.ElementAt(0).CachedFileChunkNumber.Should().Be(1);
differenceChunks.ElementAt(1).ChunkInformation.Should().NotBeEmpty();
differenceChunks.ElementAt(1).CurentFileChunkNumber.Should().Be(1);
differenceChunks.ElementAt(1).CachedFileChunkNumber.Should().BeNegative();
differenceChunks.ElementAt(2).ChunkInformation.Should().BeEmpty();
differenceChunks.ElementAt(2).CurentFileChunkNumber.Should().Be(2);
differenceChunks.ElementAt(2).CachedFileChunkNumber.Should().Be(3);
}
// cache: no chunks
//
// current: no chunks
public void TestCase1()
{
var chunksFromCurrentFile = new List <Chunk>();
var chunksFromCachedFile = new List <Chunk>();
IEnumerable <DifferenceChunk> differenceChunks = ChunkDifferentiator.GetUpdatedChunks(chunksFromCachedFile,
chunksFromCurrentFile);
differenceChunks.Count().Should().Be(0);
}
// cache: [0]
// ↓
// current: [0]
public void TestCase2()
{
var chunksFromCurrentFile = new List <Chunk> {
new Chunk(Encode("chunk"), 0)
};
var chunksFromCachedFile = new List <Chunk> {
new Chunk(Encode("chunk"), 0)
};
IEnumerable <DifferenceChunk> differenceChunks = ChunkDifferentiator.GetUpdatedChunks(chunksFromCachedFile,
chunksFromCurrentFile);
DifferenceChunk chunk = differenceChunks.Single();
chunk.CachedFileChunkNumber.Should().Be(0);
chunk.CurentFileChunkNumber.Should().Be(0);
chunk.ChunkInformation.Should().BeEmpty();
}