public void CreateChunkedFile()
{
Assert.False(File.Exists(_fileName));
var chunkedFile = new ChunkedFileStream(_fileName, 3, _chunksData, (buffer, offset, length) => null);
Assert.True(File.Exists(_fileName));
chunkedFile.Dispose();
}
public void SaveValidFileSinglePass()
{
int chunk = 0;
ChunkedFileStream.HashFunction hashFunction = (buffer, offset, length) => _chunksData.Chunks[chunk++].Hash;
using (var chunkedFile = new ChunkedFileStream(_fileName, 3, _chunksData, hashFunction))
{
Assert.AreEqual(0, chunkedFile.VerifiedLength);
Assert.AreEqual(3, chunkedFile.RemainingLength);
chunkedFile.Write(new byte[] { 1, 2, 3 }, 0, 3);
Assert.AreEqual(3, chunkedFile.VerifiedLength);
Assert.AreEqual(0, chunkedFile.RemainingLength);
}
}
public void SaveInvalidSecondPass()
{
int sequence = 0;
ChunkedFileStream.HashFunction hashFunction = (buffer, offset, length) =>
{
switch (sequence++)
{
case 0:
return(_chunksData.Chunks[0].Hash);
case 1:
return(_invalidHash);
case 2:
return(_chunksData.Chunks[1].Hash);
default:
throw new IndexOutOfRangeException(sequence.ToString());
}
};
using (var chunkedFile = new ChunkedFileStream(_fileName, 3, _chunksData, hashFunction))
{
Assert.AreEqual(0, chunkedFile.VerifiedLength);
Assert.AreEqual(3, chunkedFile.RemainingLength);
chunkedFile.Write(new byte[] { 1, 2 }, 0, 2);
Assert.AreEqual(2, chunkedFile.VerifiedLength);
Assert.AreEqual(1, chunkedFile.RemainingLength);
Assert.Throws <InvalidChunkDataException>(() => chunkedFile.Write(new byte[] { 3 }, 0, 1), "Should reject those bytes");
Assert.AreEqual(2, chunkedFile.VerifiedLength);
Assert.AreEqual(1, chunkedFile.RemainingLength);
chunkedFile.Write(new byte[] { 3 }, 0, 1);
Assert.AreEqual(3, chunkedFile.VerifiedLength);
Assert.AreEqual(0, chunkedFile.RemainingLength);
}
}
public void SaveValidFileTwoPasses()
{
int sequence = 0;
ChunkedFileStream.HashFunction hashFunction = (buffer, offset, length) => _chunksData.Chunks[sequence++].Hash;
using (var chunkedFile = new ChunkedFileStream(_fileName, 3, _chunksData, hashFunction))
{
Assert.AreEqual(0, chunkedFile.VerifiedLength);
Assert.AreEqual(3, chunkedFile.RemainingLength);
chunkedFile.Write(new byte[] { 1, 2 }, 0, 2);
Assert.AreEqual(2, chunkedFile.VerifiedLength);
Assert.AreEqual(1, chunkedFile.RemainingLength);
chunkedFile.Write(new byte[] { 3 }, 0, 1);
Assert.AreEqual(3, chunkedFile.VerifiedLength);
Assert.AreEqual(0, chunkedFile.RemainingLength);
}
Assert.AreEqual(3, new FileInfo(_fileName).Length);
}
