public void AppendTest()
{
using (var testEnvironment = StreamTestEnvironment.FromExistingVhdx(true))
using (var filesystem = new ExFatEntryFilesystem(testEnvironment.PartitionStream))
{
var file = filesystem.FindChild(filesystem.RootDirectory, DiskContent.LongContiguousFileName);
using (var s = filesystem.OpenFile(file, FileAccess.ReadWrite))
{
s.Seek(0, SeekOrigin.End);
s.WriteByte(123);
}
Assert.AreEqual(file.Length, (long)DiskContent.LongFileSize + 1);
using (var s2 = filesystem.OpenFile(file, FileAccess.Read))
{
s2.Seek(-1, SeekOrigin.End);
Assert.AreEqual(123, s2.ReadByte());
Assert.AreEqual(-1, s2.ReadByte());
}
}
}
public void UpdateLastAccessTime()
{
using (var testEnvironment = StreamTestEnvironment.FromExistingVhdx())
using (var filesystem = new ExFatEntryFilesystem(testEnvironment.PartitionStream))
{
var file = filesystem.FindChild(filesystem.RootDirectory, DiskContent.LongContiguousFileName);
var access0 = file.LastAccessTime;
using (var stream = filesystem.OpenFile(file, FileAccess.Read))
{
}
var access1 = file.LastAccessTime;
Assert.IsTrue(access1 > access0);
var file2 = filesystem.FindChild(filesystem.RootDirectory, DiskContent.LongContiguousFileName);
var access2 = file2.LastAccessTime;
Assert.AreEqual(access1, access2);
}
}
public void ReadFile()
{
using (var testEnvironment = StreamTestEnvironment.FromExistingVhdx())
using (var filesystem = new ExFatEntryFilesystem(testEnvironment.PartitionStream))
{
var file = filesystem.FindChild(filesystem.RootDirectory, DiskContent.LongContiguousFileName);
var vb = new byte[sizeof(ulong)];
using (var stream = filesystem.OpenFile(file, FileAccess.Read))
{
for (ulong offset = 0; offset < DiskContent.LongFileSize; offset += 8)
{
stream.Read(vb, 0, vb.Length);
var v = LittleEndian.ToUInt64(vb);
Assert.AreEqual(v, DiskContent.GetLongContiguousFileNameOffsetValue(offset));
}
}
}
}
public void CreateEmptyFileTest()
{
using (var testEnvironment = StreamTestEnvironment.FromExistingVhdx(true))
{
using (var filesystem = new ExFatEntryFilesystem(testEnvironment.PartitionStream))
{
using (var s = filesystem.CreateFile(filesystem.RootDirectory, "a.txt"))
{
}
var f = filesystem.FindChild(filesystem.RootDirectory, "a.txt");
using (var s2 = filesystem.OpenFile(f, FileAccess.Read))
{
Assert.AreEqual(-1, s2.ReadByte());
}
}
}
}
public void TruncateFileTest()
{
using (var testEnvironment = StreamTestEnvironment.FromExistingVhdx(true))
{
using (var filesystem = new ExFatEntryFilesystem(testEnvironment.PartitionStream))
{
var f = filesystem.FindChild(filesystem.RootDirectory, DiskContent.LongContiguousFileName);
using (var s = filesystem.OpenFile(f, FileAccess.ReadWrite))
{
s.SetLength(16);
s.Seek(0, SeekOrigin.Begin);
var b = new byte[8];
Assert.AreEqual(8, s.Read(b, 0, b.Length));
Assert.AreEqual(DiskContent.GetLongContiguousFileNameOffsetValue(0), LittleEndian.ToUInt64(b));
Assert.AreEqual(8, s.Read(b, 0, b.Length));
Assert.AreEqual(DiskContent.GetLongContiguousFileNameOffsetValue(8), LittleEndian.ToUInt64(b));
Assert.AreEqual(0, s.Read(b, 0, b.Length));
}
}
}
}
