public void TestSeekEndLengthSpecified()
{
var inner = new MemoryStream(new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07}, false);
var stream = new PartialStream(inner, 4, 4);
// in range
Assert.AreEqual(3L, stream.Seek(-1, SeekOrigin.End));
Assert.AreEqual(3L, stream.Position);
Assert.AreEqual(7L, stream.InnerStream.Position);
// beyond the length
Assert.AreEqual(8L, stream.Seek(4, SeekOrigin.End));
Assert.AreEqual(8L, stream.Position);
Assert.AreEqual(12L, stream.InnerStream.Position);
// before start of stream
try {
stream.Seek(-5, SeekOrigin.End);
Assert.Fail("IOException not thrown");
}
catch (IOException) {
}
Assert.AreEqual(8L, stream.Position);
Assert.AreEqual(12L, stream.InnerStream.Position);
}
public void TestSeekCurrent()
{
var inner = new MemoryStream(new byte[] {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07}, false);
var stream = new PartialStream(inner, 4);
// in range
Assert.AreEqual(2L, stream.Seek(2, SeekOrigin.Current));
Assert.AreEqual(2L, stream.Position);
Assert.AreEqual(6L, stream.InnerStream.Position);
// beyond the length
Assert.AreEqual(10L, stream.Seek(8, SeekOrigin.Current));
Assert.AreEqual(10L, stream.Position);
Assert.AreEqual(14L, stream.InnerStream.Position);
// before start of stream
try {
stream.Seek(-12, SeekOrigin.Current);
Assert.Fail("IOException not thrown");
}
catch (IOException) {
}
Assert.AreEqual(10L, stream.Position);
Assert.AreEqual(14L, stream.InnerStream.Position);
}