public void SaveRestorePositionTest1()
{
MemoryStream memoryStream = new MemoryStream();
using (FileEncodingOutputStream stream = CreateFileEncodingOutputStream(memoryStream)) {
IStreamPosition position = stream.SavePosition();
Assert.IsNotNull(position);
stream.RestorePosition(position);
WriteBitString(stream, "11111111");
Assert.AreEqual(new byte[] { 0xFF }, memoryStream.ToArray());
}
}
public void SaveRestorePositionTest2()
{
MemoryStream memoryStream = new MemoryStream();
using (FileEncodingOutputStream stream = CreateFileEncodingOutputStream(memoryStream)) {
IStreamPosition p1 = stream.SavePosition();
WriteBitString(stream, "11111111");
IStreamPosition p2 = stream.SavePosition();
WriteBitString(stream, "00000000");
IStreamPosition p3 = stream.SavePosition();
WriteBitString(stream, "11111111");
IStreamPosition p4 = stream.SavePosition();
stream.RestorePosition(p2);
WriteBitString(stream, "10010110");
stream.RestorePosition(p1);
WriteBitString(stream, "10011001");
stream.RestorePosition(p4);
WriteBitString(stream, "00000001");
stream.RestorePosition(p3);
WriteBitString(stream, "00001111");
Assert.AreEqual(new byte[] { 0x99, 0x69, 0xF0, 0x80 }, memoryStream.ToArray());
}
}
public void RestorePositionGuardTest()
{
using (FileEncodingOutputStream stream = CreateFileEncodingOutputStream(new MemoryStream())) {
Assert.Throws <ArgumentNullException>(() => stream.RestorePosition(null));
}
}
