public void ViewIO()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
// Check positions are independant
tss.Position = 100;
Assert.AreEqual(0, altView.Position);
Assert.AreEqual(100, tss.Position);
// Check I/O is synchronous
byte[] buffer = new byte[200];
tss.WriteByte(99);
altView.Read(buffer, 0, 200);
Assert.AreEqual(99, buffer[100]);
// Check positions are updated correctly
Assert.AreEqual(200, altView.Position);
Assert.AreEqual(101, tss.Position);
}
/// <summary>
/// Sets the length of the stream.
/// </summary>
/// <param name="value">The new length.</param>
public override void SetLength(long value)
{
CheckFrozen();
if (_diffStream != null)
{
_diffStream.SetLength(value);
}
else
{
_baseStream.SetLength(value);
}
}
/// <summary>
/// Takes a snapshot of the current stream contents.
/// </summary>
public void Snapshot()
{
if (_diffStream != null)
{
throw new InvalidOperationException("Already have a snapshot");
}
_savedPosition = _position;
_diffExtents = new List <StreamExtent>();
_diffStream = new SparseMemoryStream();
_diffStream.SetLength(_baseStream.Length);
}
public void ChangeLengthFails()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(2);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
Assert.AreEqual(2, tss.Length);
try
{
tss.SetLength(10);
Assert.Fail("SetLength should fail");
}
catch (NotSupportedException)
{
}
}
public void Seek()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
tss.Seek(10, SeekOrigin.Begin);
Assert.AreEqual(10, tss.Position);
tss.Seek(10, SeekOrigin.Current);
Assert.AreEqual(20, tss.Position);
tss.Seek(-10, SeekOrigin.End);
Assert.AreEqual(1014, tss.Position);
}
public void DisposeView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
altView.Dispose();
tss.ReadByte();
SparseStream altView2 = tss.OpenView();
altView2.ReadByte();
}
public void ChangeLengthFails()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(2);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
Assert.AreEqual(2, tss.Length);
try
{
tss.SetLength(10);
Assert.Fail("SetLength should fail");
}
catch (NotSupportedException)
{
}
}
public void Dispose_StopsView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
tss.Dispose();
try
{
altView.ReadByte();
Assert.Fail("Disposed stream didn't stop view");
}
catch (ObjectDisposedException)
{
}
}
public void Extents()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
tss.Position = 100;
tss.WriteByte(99);
List <StreamExtent> extents = new List <StreamExtent>(altView.Extents);
Assert.AreEqual(1, extents.Count);
Assert.AreEqual(100, extents[0].Start);
Assert.AreEqual(1, extents[0].Length);
extents = new List <StreamExtent>(altView.GetExtentsInRange(10, 300));
Assert.AreEqual(1, extents.Count);
Assert.AreEqual(100, extents[0].Start);
Assert.AreEqual(1, extents[0].Length);
}
public void DisposeView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
altView.Dispose();
tss.ReadByte();
SparseStream altView2 = tss.OpenView();
altView2.ReadByte();
}
public void ViewIO()
{
SparseMemoryStream memStream = new SparseMemoryStream();
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
// Check positions are independant
tss.Position = 100;
Assert.AreEqual(0, altView.Position);
Assert.AreEqual(100, tss.Position);
// Check I/O is synchronous
byte[] buffer = new byte[200];
tss.WriteByte(99);
altView.Read(buffer, 0, 200);
Assert.AreEqual(99, buffer[100]);
// Check positions are updated correctly
Assert.AreEqual(200, altView.Position);
Assert.AreEqual(101, tss.Position);
}
public void Seek()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
tss.Seek(10, SeekOrigin.Begin);
Assert.AreEqual(10, tss.Position);
tss.Seek(10, SeekOrigin.Current);
Assert.AreEqual(20, tss.Position);
tss.Seek(-10, SeekOrigin.End);
Assert.AreEqual(1014, tss.Position);
}
public void Extents()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
tss.Position = 100;
tss.WriteByte(99);
List<StreamExtent> extents = new List<StreamExtent>(altView.Extents);
Assert.AreEqual(1, extents.Count);
Assert.AreEqual(100, extents[0].Start);
Assert.AreEqual(1, extents[0].Length);
extents = new List<StreamExtent>(altView.GetExtentsInRange(10, 300));
Assert.AreEqual(1, extents.Count);
Assert.AreEqual(100, extents[0].Start);
Assert.AreEqual(1, extents[0].Length);
}
public void Dispose_StopsView()
{
SparseMemoryStream memStream = new SparseMemoryStream(new SparseMemoryBuffer(1), FileAccess.ReadWrite);
memStream.SetLength(1024);
ThreadSafeStream tss = new ThreadSafeStream(memStream);
SparseStream altView = tss.OpenView();
tss.Dispose();
try
{
altView.ReadByte();
Assert.Fail("Disposed stream didn't stop view");
}
catch (ObjectDisposedException)
{
}
}
/// <summary>
/// Takes a snapshot of the current stream contents.
/// </summary>
public void Snapshot()
{
if (_diffStream != null)
{
throw new InvalidOperationException("Already have a snapshot");
}
_savedPosition = _position;
_diffExtents = new List<StreamExtent>();
_diffStream = new SparseMemoryStream();
_diffStream.SetLength(_baseStream.Length);
}