public void CompressUncompressEmpty()
{
var compressed = CompressTool.Compress(new byte[0]);
Assert.IsTrue(compressed.Length > 0);
Assert.AreEqual(0, CompressTool.Uncompress(compressed).Length);
}
public void CompressUncompressTest()
{
var data = _dataCreator.GenerateTestData(1024 * 1024);
var compressed = CompressTool.Compress(data);
Assert.IsTrue(compressed.Length > 0);
Assert.IsTrue(data.SequenceEqual(CompressTool.Uncompress(compressed)));
}
public void CompressRange()
{
var input = Encoding.ASCII.GetBytes("ByeHelloBye");
var output = new byte[100];
var length = CompressTool.Compress(input, 3, 5, output, 10);
Assert.AreEqual("Hello",
Encoding.ASCII.GetString(CompressTool.Uncompress(output.Skip(10).Take(length).ToArray())));
}
public void UncompressRange()
{
var howdy = Encoding.ASCII.GetBytes("Howdy");
var padded = howdy.Take(3).Concat(CompressTool.Compress(Encoding.ASCII.GetBytes("Hello"))).Concat(howdy.Skip(3)).ToArray();
var output = new byte[100];
var length = CompressTool.Uncompress(padded, 3, padded.Length - 5, output, 10);
Assert.AreEqual(5, length);
Assert.AreEqual("Hello", Encoding.ASCII.GetString(output.Skip(10).Take(5).ToArray()));
}
private void DoUncompressionBenchmark(int size)
{
Benchmark.Run("Uncompressing", size, benchmark =>
{
var compressed = CompressTool.Compress(benchmark.Input);
var roundtrip = new byte[benchmark.Input.Length];
int length = 0;
benchmark.Stopwatch.Start();
for (int i = 0; i < benchmark.Iterations; ++i)
{
length = CompressTool.Uncompress(compressed, 0, compressed.Length, roundtrip, 0);
}
benchmark.Stopwatch.Stop();
CollectionAssert.AreEqual(benchmark.Input, roundtrip);
});
}
private void DoCompressionBenchmark(int size)
{
Benchmark.Run("Compressing", size, benchmark =>
{
var output = new byte[CompressTool.GetMaxCompressedLength(benchmark.Input.Length)];
int length = 0;
benchmark.Stopwatch.Start();
for (int i = 0; i < benchmark.Iterations; ++i)
{
length = CompressTool.Compress(benchmark.Input, 0, benchmark.Input.Length, output, 0);
}
benchmark.Stopwatch.Stop();
var roundtrip = new byte[benchmark.Input.Length];
var roundtripLength = CompressTool.Uncompress(output, 0, length, roundtrip, 0);
Assert.IsTrue(benchmark.Input.SequenceEqual(roundtrip.Take(roundtripLength)));
benchmark.Note = String.Format(" ({0:0.00 %})", length / (double)benchmark.Input.Length);
});
}
private Task DoAsyncUncompressionOneParaBenchmark(int size)
{
return(Task.Factory.StartNew(() =>
{
Benchmark.Run("Uncompressing", size, benchmark =>
{
var compressed = CompressTool.Compress(benchmark.Input);
var roundtrip = new byte[benchmark.Input.Length];
int length = 0;
benchmark.Stopwatch.Start();
for (int i = 0; i < benchmark.Iterations; ++i)
{
roundtrip = CompressTool.Uncompress(compressed);
length = roundtrip.Length;
}
benchmark.Stopwatch.Stop();
CollectionAssert.AreEqual(benchmark.Input, roundtrip);
});
}));
}
private Task DoAsyncCompressionOneParaBenchmark(int size)
{
return(Task.Factory.StartNew(() =>
{
Benchmark.Run("Compressing", size, benchmark =>
{
var output = new byte[CompressTool.GetMaxCompressedLength(benchmark.Input.Length)];
int length = 0;
benchmark.Stopwatch.Start();
for (int i = 0; i < benchmark.Iterations; ++i)
{
output = CompressTool.Compress(benchmark.Input);
length = output.Length;
}
benchmark.Stopwatch.Stop();
var roundtrip = CompressTool.Uncompress(output);
Assert.IsTrue(benchmark.Input.SequenceEqual(roundtrip));
benchmark.Note = String.Format(" ({0:0.00 %})", length / (double)benchmark.Input.Length);
});
}));
}
public void UncompressExceptions()
{
var uncompressed = Encoding.ASCII.GetBytes("Hello, hello, howdy?");
var compressed = CompressTool.Compress(uncompressed);
var buffer = new byte[100];
TestException(() => { CompressTool.Uncompress(null); }, typeof(ArgumentNullException));
TestException(() => { CompressTool.Uncompress(null, 0, 3, buffer, 0); }, typeof(ArgumentNullException));
TestException(() => { CompressTool.Uncompress(compressed, 0, compressed.Length, null, 0); }, typeof(ArgumentNullException));
TestException(() => { CompressTool.Uncompress(compressed, -1, uncompressed.Length, buffer, 0); }, typeof(ArgumentOutOfRangeException));
TestException(() => { CompressTool.Uncompress(compressed, 0, -1, buffer, 0); }, typeof(ArgumentOutOfRangeException));
TestException(() => { CompressTool.Uncompress(compressed, compressed.Length - 2, 4, buffer, 0); }, typeof(ArgumentOutOfRangeException));
TestException(() => { CompressTool.Uncompress(compressed, 0, 0, buffer, 0); }, typeof(System.IO.IOException));
TestException(() => { CompressTool.Uncompress(compressed, compressed.Length, 0, buffer, 0); }, typeof(System.IO.IOException));
TestException(() => { CompressTool.Uncompress(compressed, 0, compressed.Length, buffer, -1); }, typeof(ArgumentOutOfRangeException));
TestException(() => { CompressTool.Uncompress(compressed, 0, compressed.Length, buffer, 101); }, typeof(ArgumentOutOfRangeException));
TestException(() => { CompressTool.Uncompress(compressed, 0, compressed.Length, buffer, 97); }, typeof(ArgumentOutOfRangeException));
}
/// <summary>
/// Retrieves data from the frame. Data is uncompressed before being stored in the output buffer.
/// CRC of the data is checked and CRC failure results in exception.
/// </summary>
/// <param name="buffer">Output buffer where uncompressed data is stored. Buffer length minus offset must be at least DataLength bytes.</param>
/// <param name="offset">Offset into the output buffer where uncompressed data will be stored.</param>
public void GetData(byte[] buffer, int offset)
{
if (Type == SnappyFrameType.Compressed)
{
var count = CompressTool.Uncompress(Buffer, 0, BufferUsage, buffer, offset);
if (ComputeMasked(buffer, offset, count) != Checksum)
{
throw new InvalidDataException();
}
}
else if (Type == SnappyFrameType.Uncompressed)
{
if (ComputeMasked(Buffer, offset, BufferUsage) != Checksum)
{
throw new InvalidDataException();
}
Array.Copy(Buffer, 0, buffer, offset, BufferUsage);
}
else
{
throw new InvalidOperationException();
}
}
public void CompressUncompressSimple()
{
Assert.AreEqual("Hello",
Encoding.ASCII.GetString(
CompressTool.Uncompress(CompressTool.Compress(Encoding.ASCII.GetBytes("Hello")))));
}