public void TestCreateAndAppendFile_Bigger()
{
// this method test FileLog's behaviour when file size is exactly max size per FBT and new data is appended
// there was a problem before with new FBT not being created in this case
var file1 = log.CreateFile();
log.Close();
// a little hack to avoid writing gigabyte of data
FileStream stream = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite);
var newFileSize = FileLogTestsHelper.CreateBigLogFile(file1.Hint, stream, true);
log = new FileLog(filename, FileMode.Open);
// Don't use hint from previously open log file
log.AppendDataToFile(file1, new ByteArray(new byte[] { 233, 234, 235, 236 }));
log.AppendDataToFile(file1, new ByteArray(new byte[] { 237, 238, 239 }));
log.Close();
stream = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite);
using (BinaryReader binReader = new BinaryReader(stream))
{
stream.Position = 0;
// move to file table pointer
stream.Position = binReader.ReadInt64() + 4 * sizeof(long);
// move to pointer to file 1
stream.Position = binReader.ReadInt64() + sizeof(long);
// move to file 1 - file size
stream.Position = binReader.ReadInt64();
Assert.Equal(newFileSize + 7, binReader.ReadInt64());
long nextFBT = binReader.ReadInt64();
Assert.InRange(nextFBT, 1, stream.Length);
// move to last FBT entry (next pointer was read already)
stream.Position += (FileLog.FilesPerBlock - 1) * sizeof(long);
// move to last FBT2 entry
stream.Position = binReader.ReadInt64() + FileLog.FilesPerBlock * sizeof(long);
// move to data block
stream.Position = binReader.ReadInt64();
for (int i = 0; i < FileLog.BlockSize; ++i)
{
// check that previous data were not altered
Assert.Equal(i % 128, binReader.ReadByte());
}
// move to second FBT
stream.Position = nextFBT;
// no third FBT
Assert.Equal(0, binReader.ReadInt64());
long fbt2Ptr = binReader.ReadInt64();
Assert.InRange(fbt2Ptr, 1, stream.Length);
// no other entry in the second FBT
Assert.Equal(0, binReader.ReadInt64());
stream.Position = fbt2Ptr;
long dataPtr = binReader.ReadInt64();
Assert.InRange(dataPtr, 1, stream.Length);
stream.Position = dataPtr;
for (int i = 0; i < 7; ++i)
{
var b = binReader.ReadByte();
Assert.Equal(233 + i, b);
}
}
}
public void TestGetFileLength()
{
var hint = log.CreateFile();
Assert.Equal(0, logReader.GetFileLength(hint));
log.AppendDataToFile(hint, new ByteArray(new byte[] { 1, 2, 3, 4 }));
Assert.Equal(4, logReader.GetFileLength(hint));
log.AppendDataToFile(hint, new ByteArray(new byte[] { 1, 2, 3, 4 }));
Assert.Equal(8, logReader.GetFileLength(hint));
}
public void TestCreateAndAppendFile_OneBlock()
{
var file1 = log.CreateFile();
log.AppendDataToFile(file1, new ByteArray(new byte[] { 1, 2, 3, 4 }));
log.AppendDataToFile(file1, new ByteArray(new byte[] { 5, 6, 7, 8 }));
log.Close();
FileStream stream = new FileStream(filename, FileMode.Open, FileAccess.Read);
using (BinaryReader binReader = new BinaryReader(stream))
{
// a pointer to format info
stream.Position = 0;
// a pointer to file table
stream.Position = binReader.ReadInt64() + 4 * sizeof(long);
var fileTable = binReader.ReadInt64();
Assert.InRange(fileTable, 1, stream.Length - 1);
// file count
Assert.Equal(1, binReader.ReadInt64());
// skip file table next pointer
stream.Position = fileTable + sizeof(long);
long filePtr = binReader.ReadInt64();
Assert.InRange(filePtr, 1, stream.Length - 1);
stream.Position = filePtr;
// file size
Assert.Equal(8, binReader.ReadInt64());
// FBT - next pointer
Assert.Equal(0, binReader.ReadInt64());
// FBT - first FBT2 entry
long fbt2Ptr = binReader.ReadInt64();
Assert.InRange(fbt2Ptr, 1, stream.Length - 1);
stream.Position = fbt2Ptr;
long dataPtr = binReader.ReadInt64();
Assert.InRange(dataPtr, 1, stream.Length - 1);
stream.Position = dataPtr;
for (int i = 1; i <= 8; i++)
{
Assert.Equal(i, binReader.ReadByte());
}
binReader.Close();
}
}
public void TestReadFileDataToBuffer_Big()
{
var hint = log.CreateFile();
logReader.Close();
log.Close();
var stream = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
var newFileSize = FileLogTestsHelper.CreateBigLogFile(hint.Hint, stream);
stream.Close();
log = new FileLog(filename, FileMode.Open);
log.AppendDataToFile(hint, new ByteArray(new byte[] { 1, 2, 3, 4 }));
byte[] buffer = new byte[128];
buffer[0] = 15;
logReader = log.CreateReader();
logReader.ReadFileDataToBuffer(hint, buffer, newFileSize, 4, 1);
Assert.Equal(15, buffer[0]);
Assert.Equal(1, buffer[1]);
Assert.Equal(2, buffer[2]);
}