public void TestCache2()
{
// Writer
DurableFileStream dfs = new DurableFileStream("TestCache2.dat", true, 5000);
byte[] writeBuffer = new byte[4096];
Helper.SetArrayRandomly(writeBuffer);
dfs.Write(writeBuffer, 0, writeBuffer.Length);
byte[] writeBuffer2 = new byte[4096];
Helper.SetArrayRandomly(writeBuffer2);
dfs.Write(writeBuffer2, 0, writeBuffer2.Length);
byte[] writeBuffer3 = new byte[4096];
Helper.SetArrayRandomly(writeBuffer3);
dfs.Write(writeBuffer3, 0, writeBuffer2.Length);
dfs.Commit();
byte[] writeBuffer4 = new byte[4096];
Helper.SetArrayRandomly(writeBuffer4);
dfs.Write(writeBuffer4, 0, writeBuffer2.Length);
dfs.Seek(-2 * 4096, System.IO.SeekOrigin.Current);
byte[] readBuffer = new byte[4096];
dfs.Read(readBuffer, 0, readBuffer.Length);
dfs.Seek(-2 * 4096, System.IO.SeekOrigin.Current);
byte[] readBuffer2 = new byte[4096];
dfs.Read(readBuffer2, 0, readBuffer2.Length);
dfs.Close();
}
public void TestWriteReadRandom_Seek2()
{
DurableFileStream dfs = new DurableFileStream("TestWriteReadRandom_Seek2.dat", true);
// seek
long seekedPos = dfs.Seek(2000, SeekOrigin.Begin);
Assert.AreEqual<long>(seekedPos, 2000);
Assert.AreEqual<long>(dfs.Position, 2000);
Assert.AreEqual<long>(dfs.Length, 0);
seekedPos = dfs.Seek(-1000, SeekOrigin.Current);
Assert.AreEqual<long>(seekedPos, 1000);
Assert.AreEqual<long>(dfs.Position, 1000);
Assert.AreEqual<long>(dfs.Length, 0);
// write
int bufferSize = DurableFileStream.BLOCK_SIZE;
byte[] writeBuffer = new byte[bufferSize];
Helper.SetArrayRandomly(writeBuffer);
dfs.Write(writeBuffer, 0, bufferSize);
long lastPosition = seekedPos + bufferSize;
Assert.AreEqual<long>(dfs.Position, lastPosition);
Assert.AreEqual<long>(dfs.Length, lastPosition);
seekedPos = dfs.Seek(-1000, SeekOrigin.End);
Assert.AreEqual<long>(seekedPos, lastPosition - 1000);
Assert.AreEqual<long>(dfs.Position, lastPosition - 1000);
Assert.AreEqual<long>(dfs.Length, lastPosition);
dfs.Commit();
dfs.Close();
}
public void TestWriteReadRandom_Seek1()
{
DurableFileStream dfs = new DurableFileStream("TestWriteReadRandom_Seek1.dat", true);
long seekedPos = dfs.Seek(2000, SeekOrigin.Begin);
Assert.AreEqual<long>(seekedPos, 2000);
Assert.AreEqual<long>(dfs.Position, 2000);
Assert.AreEqual<long>(dfs.Length, 0);
seekedPos = dfs.Seek(-1000, SeekOrigin.Current);
Assert.AreEqual<long>(seekedPos, 1000);
Assert.AreEqual<long>(dfs.Position, 1000);
Assert.AreEqual<long>(dfs.Length, 0);
dfs.Close();
}
public void TestLogWriteOptimization2()
{
Random rand = new Random();
byte[] writeBuffer1 = new byte[2500];
Helper.SetArrayRandomly(writeBuffer1);
byte[] writeBuffer2 = new byte[1000];
Helper.SetArrayRandomly(writeBuffer2);
//
// Writer
//
DurableFileStream dfs = new DurableFileStream("TestLogWriteOptimization2.dat", true);
dfs.Write(writeBuffer1, 0, writeBuffer1.Length);
Assert.AreEqual<long>(dfs.Position, writeBuffer1.Length);
Assert.AreEqual<long>(dfs.Length, writeBuffer1.Length);
dfs.Seek(500, System.IO.SeekOrigin.Begin);
Assert.AreEqual<long>(dfs.Position, 500);
dfs.Write(writeBuffer2, 0, writeBuffer2.Length);
Assert.AreEqual<long>(dfs.Position, 500 + writeBuffer2.Length);
Assert.AreEqual<long>(dfs.Length, writeBuffer1.Length);
dfs.Commit();
dfs.Close();
//
// Reader
//
dfs = new DurableFileStream("TestLogWriteOptimization2.dat", false);
byte[] readBuffer = new byte[writeBuffer1.Length];
dfs.Read(readBuffer, 0, writeBuffer1.Length);
Assert.AreEqual<long>(dfs.Position, writeBuffer1.Length);
Assert.AreEqual<long>(dfs.Length, writeBuffer1.Length);
byte[] mergedWriteBuffer = new byte[writeBuffer1.Length];
Array.Copy(writeBuffer1, 0, mergedWriteBuffer, 0, writeBuffer1.Length);
Array.Copy(writeBuffer2, 0, mergedWriteBuffer, 500, writeBuffer2.Length);
dfs.Close();
// Validate
Assert.IsTrue(Helper.EqualArray(readBuffer, mergedWriteBuffer));
}
public void TestOffset1()
{
int bufferSize = 4096;
byte[] writeBuffer = new byte[bufferSize];
Helper.SetArrayRandomly(writeBuffer);
//
// Writer
//
DurableFileStream dfs = new DurableFileStream("TestOffset1.dat", true);
int offset = 100;
int count = 500;
dfs.Write(writeBuffer, offset, count);
dfs.Seek(0, System.IO.SeekOrigin.Begin);
byte[] readBuffer = new byte[count * 2];
int readOffest = 300;
dfs.Read(readBuffer, readOffest, count);
bool equal = true;
for (int i = offset; i < count; i++)
{
if (writeBuffer[i] != readBuffer[i - offset + readOffest])
{
equal = false;
break;
}
}
Assert.IsTrue(equal);
dfs.Commit();
Assert.AreEqual<long>(dfs.Position, count);
Assert.AreEqual<long>(dfs.Length, count);
dfs.Seek(0, System.IO.SeekOrigin.Begin);
readBuffer = new byte[count * 2];
dfs.Read(readBuffer, readOffest, count);
equal = true;
for (int i = offset; i < count; i++)
{
if (writeBuffer[i] != readBuffer[i - offset + readOffest])
{
equal = false;
break;
}
}
Assert.IsTrue(equal);
dfs.Close();
//
// Reader
//
dfs = new DurableFileStream("TestOffset1.dat", false);
Assert.AreEqual<long>(dfs.Position, 0);
Assert.AreEqual<long>(dfs.Length, count);
int count2 = count - 10;
readBuffer = new byte[count2 * 3];
readOffest = 750;
dfs.Read(readBuffer, readOffest, count2);
equal = true;
for (int i = offset; i < count2; i++)
{
if (writeBuffer[i] != readBuffer[i - offset + readOffest])
{
equal = false;
break;
}
}
Assert.IsTrue(equal);
Assert.AreEqual<long>(dfs.Position, count2);
Assert.AreEqual<long>(dfs.Length, count);
dfs.Close();
}
