public virtual void CommonUsagePerfTest()
{
int NumRuns = 5;
DataChecksum checksum = DataChecksum.NewDataChecksum(DataChecksum.Type.Crc32c, 512
);
int dataLength = 512 * 1024 * 1024;
TestDataChecksum.Harness h = new TestDataChecksum.Harness(checksum, dataLength, true
);
for (int i = 0; i < NumRuns; i++)
{
StopWatch s = new StopWatch().Start();
// calculate real checksum, make sure it passes
checksum.CalculateChunkedSums(h.dataBuf, h.checksumBuf);
s.Stop();
System.Console.Error.WriteLine("Calculate run #" + i + ": " + s.Now(TimeUnit.Microseconds
) + "us");
s = new StopWatch().Start();
// calculate real checksum, make sure it passes
checksum.VerifyChunkedSums(h.dataBuf, h.checksumBuf, "fake file", 0);
s.Stop();
System.Console.Error.WriteLine("Verify run #" + i + ": " + s.Now(TimeUnit.Microseconds
) + "us");
}
}
public virtual void TestEquality()
{
Assert.Equal(DataChecksum.NewDataChecksum(DataChecksum.Type.Crc32
, 512), DataChecksum.NewDataChecksum(DataChecksum.Type.Crc32, 512));
NUnit.Framework.Assert.IsFalse(DataChecksum.NewDataChecksum(DataChecksum.Type.Crc32
, 512).Equals(DataChecksum.NewDataChecksum(DataChecksum.Type.Crc32, 1024)));
NUnit.Framework.Assert.IsFalse(DataChecksum.NewDataChecksum(DataChecksum.Type.Crc32
, 512).Equals(DataChecksum.NewDataChecksum(DataChecksum.Type.Crc32c, 512)));
}
public override bool Equals(object other)
{
if (!(other is DataChecksum))
{
return(false);
}
DataChecksum o = (DataChecksum)other;
return(o.bytesPerChecksum == this.bytesPerChecksum && o.type == this.type);
}
public virtual void Setup()
{
Assume.AssumeTrue(NativeCrc32.IsAvailable());
Assert.Equal("These tests assume they can write a checksum value as a 4-byte int."
, 4, checksumType.size);
Configuration conf = new Configuration();
bytesPerChecksum = conf.GetInt(IoBytesPerChecksumKey, IoBytesPerChecksumDefault);
fileName = this.GetType().Name;
checksum = DataChecksum.NewDataChecksum(checksumType, bytesPerChecksum);
}
/// <summary>
/// This constructs a DataChecksum by reading HEADER_LEN bytes from input
/// stream <i>in</i>
/// </summary>
/// <exception cref="System.IO.IOException"/>
public static DataChecksum NewDataChecksum(DataInputStream @in)
{
int type = @in.ReadByte();
int bpc = @in.ReadInt();
DataChecksum summer = NewDataChecksum(DataChecksum.Type.ValueOf(type), bpc);
if (summer == null)
{
throw new IOException("Could not create DataChecksum of type " + type + " with bytesPerChecksum "
+ bpc);
}
return(summer);
}
public virtual void TestBulkOps()
{
foreach (DataChecksum.Type type in ChecksumTypes)
{
System.Console.Error.WriteLine("---- beginning tests with checksum type " + type
+ "----");
DataChecksum checksum = DataChecksum.NewDataChecksum(type, BytesPerChunk);
foreach (bool useDirect in new bool[] { false, true })
{
DoBulkTest(checksum, 1023, useDirect);
DoBulkTest(checksum, 1024, useDirect);
DoBulkTest(checksum, 1025, useDirect);
}
}
}
internal Harness(DataChecksum checksum, int dataLength, bool useDirect)
{
this.checksum = checksum;
this.dataLength = dataLength;
numSums = (dataLength - 1) / checksum.GetBytesPerChecksum() + 1;
sumsLength = numSums * checksum.GetChecksumSize();
byte[] data = new byte[dataLength + DataOffsetInBuffer + DataTrailerInBuffer];
new Random().NextBytes(data);
dataBuf = ByteBuffer.Wrap(data, DataOffsetInBuffer, dataLength);
byte[] checksums = new byte[SumsOffsetInBuffer + sumsLength];
checksumBuf = ByteBuffer.Wrap(checksums, SumsOffsetInBuffer, sumsLength);
// Swap out for direct buffers if requested.
if (useDirect)
{
dataBuf = Directify(dataBuf);
checksumBuf = Directify(checksumBuf);
}
}
public virtual void TestToString()
{
Assert.Equal("DataChecksum(type=CRC32, chunkSize=512)", DataChecksum
.NewDataChecksum(DataChecksum.Type.Crc32, 512).ToString());
}
/// <exception cref="System.Exception"/>
private void DoBulkTest(DataChecksum checksum, int dataLength, bool useDirect)
{
System.Console.Error.WriteLine("Testing bulk checksums of length " + dataLength +
" with " + (useDirect ? "direct" : "array-backed") + " buffers");
new TestDataChecksum.Harness(checksum, dataLength, useDirect).TestCorrectness();
}
