public void TestGetSameChuckSeveralTimes()
{
var holder = new FileChunkHolder();
holder.Add(0, new byte[0]);
holder.Get(0);
holder.Get(0);
}
public void TestFileChunksFromSomeByteArray()
{
var bytes = Encoding.UTF8.GetBytes("Hello, World!");
var holder = new FileChunkHolder();
holder.Add(0, bytes.RangeSubset(0, 5));
holder.Add(1, bytes.RangeSubset(5, 2));
holder.Add(2, bytes.RangeSubset(7, 5));
holder.Add(3, bytes.RangeSubset(12, 1));
Assert.AreEqual(4, holder.Count());
Assert.AreEqual("Hello", Encoding.UTF8.GetString(holder.Get(0)));
Assert.AreEqual(", ", Encoding.UTF8.GetString(holder.Get(1)));
Assert.AreEqual("World", Encoding.UTF8.GetString(holder.Get(2)));
Assert.AreEqual("!", Encoding.UTF8.GetString(holder.Get(3)));
Assert.AreEqual(0, holder.Count());
}
public void TestReadWholeFileToOneChunk()
{
var file = new FileInfo("input.txt");
var chunkHolder = new FileChunkHolder();
var command = new ReadChunkCommand(file.Name, 0, (int)file.Length, 0, chunkHolder);
command.Execute();
var chunk = chunkHolder.Get(0);
Assert.AreEqual(file.Length, chunk.Length);
CollectionAssert.AreEqual(File.ReadAllBytes(file.Name), chunk);
}
public void TestDecompressSeveralChunks()
{
var originalByteChunks = new List <byte[]>(3)
{
new List <byte>().Concat(Constants.GZipDefaultHeader).Concat(new byte[] { 0x00, 0x01, 0x02 }).ToArray(),
new List <byte>().Concat(Constants.GZipDefaultHeader).Concat(new byte[] { 0x05, 0x06, 0x07 }).ToArray(),
new List <byte>().Concat(Constants.GZipDefaultHeader).Concat(new byte[] { 0x0A, 0x0B, 0x0C }).ToArray()
};
var compressor = new GZipCompressor();
var inputHolder = new FileChunkHolder();
var outputHolder = new FileChunkHolder();
inputHolder.Add(0, originalByteChunks[0]);
inputHolder.Add(1, originalByteChunks[1]);
inputHolder.Add(2, originalByteChunks[2]);
Assert.AreEqual(originalByteChunks.Count, inputHolder.Count());
Assert.AreEqual(0, outputHolder.Count());
var commands = new List <ICommand>(3)
{
new DecompressChunkCommand(0, inputHolder, outputHolder, compressor),
new DecompressChunkCommand(1, inputHolder, outputHolder, compressor),
new DecompressChunkCommand(2, inputHolder, outputHolder, compressor)
};
foreach (var command in commands)
{
command.Execute();
}
Assert.AreEqual(0, inputHolder.Count());
Assert.AreEqual(originalByteChunks.Count, outputHolder.Count());
CollectionAssert.AreEqual(new byte[0], outputHolder.Get(0));
CollectionAssert.AreEqual(new byte[0], outputHolder.Get(1));
CollectionAssert.AreEqual(new byte[0], outputHolder.Get(2));
}
public void TestCompressSeveralChunks()
{
var originalByteChunks = new List <byte[]>(3)
{
Encoding.UTF8.GetBytes("High-Speed Recovery"),
Encoding.UTF8.GetBytes("Verified Recoverability"),
Encoding.UTF8.GetBytes("Complete Visibility")
};
var compressor = new GZipCompressor();
var inputHolder = new FileChunkHolder();
var outputHolder = new FileChunkHolder();
inputHolder.Add(0, originalByteChunks[0]);
inputHolder.Add(1, originalByteChunks[1]);
inputHolder.Add(2, originalByteChunks[2]);
Assert.AreEqual(originalByteChunks.Count, inputHolder.Count());
Assert.AreEqual(0, outputHolder.Count());
var commands = new List <ICommand>(3)
{
new CompressChunkCommand(0, inputHolder, outputHolder, compressor),
new CompressChunkCommand(1, inputHolder, outputHolder, compressor),
new CompressChunkCommand(2, inputHolder, outputHolder, compressor)
};
foreach (var command in commands)
{
command.Execute();
}
Assert.AreEqual(0, inputHolder.Count());
Assert.AreEqual(originalByteChunks.Count, outputHolder.Count());
CollectionAssert.AreEqual(compressor.Compress(originalByteChunks[0]), outputHolder.Get(0));
CollectionAssert.AreEqual(compressor.Compress(originalByteChunks[1]), outputHolder.Get(1));
CollectionAssert.AreEqual(compressor.Compress(originalByteChunks[2]), outputHolder.Get(2));
}
public void TestReadSomeFileToSeveralChunks()
{
var file = new FileInfo("input.txt");
var chunkHolder = new FileChunkHolder();
var commands = new List <ICommand>(0);
var bytesAvailable = file.Length;
var readPosition = 0;
var chunkIndex = 0;
while (bytesAvailable > 0)
{
var readCount = bytesAvailable < Constants.DefaultByteBufferSize
? (int)bytesAvailable
: Constants.DefaultByteBufferSize;
commands.Add(new ReadChunkCommand(file.Name, readPosition, readCount, chunkIndex, chunkHolder));
bytesAvailable -= readCount;
readPosition += readCount;
chunkIndex++;
}
foreach (var command in commands)
{
command.Execute();
}
var chunksCount = chunkHolder.Count();
Assert.AreEqual(file.Length / Constants.DefaultByteBufferSize + 1, chunksCount);
var chunkHolderBytes = new List <byte>(0);
for (var i = 0; i < chunksCount; i++)
{
chunkHolderBytes.AddRange(chunkHolder.Get(i));
}
Assert.AreEqual(0, chunkHolder.Count());
Assert.AreEqual(file.Length, chunkHolderBytes.Count);
CollectionAssert.AreEqual(File.ReadAllBytes(file.Name), chunkHolderBytes);
}
public void TestCompressOneChunk()
{
var originalBytes = Encoding.UTF8.GetBytes("AVAILABILITY for the Always-On Enterprise");
var compressor = new GZipCompressor();
var inputHolder = new FileChunkHolder();
var outputHolder = new FileChunkHolder();
inputHolder.Add(0, originalBytes);
Assert.AreEqual(1, inputHolder.Count());
Assert.AreEqual(0, outputHolder.Count());
var command = new CompressChunkCommand(0, inputHolder, outputHolder, compressor);
command.Execute();
Assert.AreEqual(0, inputHolder.Count());
Assert.AreEqual(1, outputHolder.Count());
CollectionAssert.AreEqual(compressor.Compress(originalBytes), outputHolder.Get(0));
}
public void TestDecompressOneChunk()
{
var originalBytes = new List <byte>()
.Concat(Constants.GZipDefaultHeader)
.Concat(new byte[] { 0x00, 0x01, 0x02 }).ToArray();
var compressor = new GZipCompressor();
var inputHolder = new FileChunkHolder();
var outputHolder = new FileChunkHolder();
inputHolder.Add(0, originalBytes);
Assert.AreEqual(1, inputHolder.Count());
Assert.AreEqual(0, outputHolder.Count());
var command = new DecompressChunkCommand(0, inputHolder, outputHolder, compressor);
command.Execute();
Assert.AreEqual(0, inputHolder.Count());
Assert.AreEqual(1, outputHolder.Count());
CollectionAssert.AreEqual(new byte[0], outputHolder.Get(0));
}