public void Read_SingleStream_ReadFromThePositionAfterTheEnd()
{
ConcatReadingStream s = Create(CreateCharStm('a', 'g'));
s.Position = 10;
CheckRead(s, 100, "");
}
public void Read_SingleStream_ReadFromMiddleOfTheStream_ReadMoreThanExists()
{
ConcatReadingStream s = Create(CreateCharStm('a', 'g'));
s.Position = 4;
CheckRead(s, 100, "ef");
}
public void Read_SingleStream_ReadExactlyFromTheEndOfTheStream()
{
ConcatReadingStream s = Create(CreateCharStm('a', 'g'));
s.Position = 6;
CheckRead(s, 100, "");
}
ConcatReadingStream Create(params MemoryStream[] streams)
{
ConcatReadingStream ret = new ConcatReadingStream();
ret.Update(streams);
return(ret);
}
public void Read_SingleStream_ReadFromMiddleOfTheStream()
{
ConcatReadingStream s = Create(CreateCharStm('a', 'g'));
s.Position = 3;
CheckRead(s, "def");
}
public void Read_TwoStreams_ReadExactlyWholeStream()
{
ConcatReadingStream s = Create(
CreateCharStm('a', 'g'),
CreateCharStm('o', 'u')
);
CheckRead(s, 100, "abcdefopqrst");
}
void CheckRead(ConcatReadingStream stm, int bytesToRead, string expectation)
{
byte[] buf = new byte[bytesToRead];
long savePos = stm.Position;
int read = stm.Read(buf, 0, bytesToRead);
Assert.AreEqual(expectation.Length, read);
Assert.AreEqual(expectation, Encoding.ASCII.GetString(buf, 0, read));
Assert.AreEqual(savePos + read, stm.Position);
}
public void Read_TwoStreams_ReadFromTheMiddleOfTheSecondStream()
{
ConcatReadingStream s = Create(
CreateCharStm('0', '7'),
CreateCharStm('o', 'u')
);
s.Position = 8;
CheckRead(s, 2, "pq");
}
public void Read_TwoStreams_ReadFromTheMiddleOfTheFirstStreamToTheMiddleOfTheSecondStream()
{
ConcatReadingStream s = Create(
CreateCharStm('0', '7'),
CreateCharStm('o', 'u')
);
s.Position = 4;
CheckRead(s, 7, "456opqr");
}
public void Read_ThreeStreams_ReadOverTheSteamInTheMiddle()
{
ConcatReadingStream s = Create(
CreateCharStm('0', '7'),
CreateCharStm('a', 'f'),
CreateCharStm('o', 'u')
);
s.Position = 5;
CheckRead(s, 10, "56abcdeopq");
}
public void Read_TwoStreams_ReadNothing()
{
ConcatReadingStream s = Create(
CreateCharStm('0', '7'),
CreateCharStm('o', 'u')
);
s.Position = 8;
CheckRead(s, 0, "");
Assert.AreEqual(s.Position, (long)8);
}
void CheckRead(ConcatReadingStream stm, string expectation)
{
CheckRead(stm, expectation.Length, expectation);
}