public static void SetPosition()
{
using var ms = new MemoryStream(new byte[] { 1, 3, 5, 8, 12 });
using var segment = new StreamSegment(ms);
segment.Adjust(1, 3);
segment.Position = 1;
Equal(5, segment.ReadByte());
Equal(2, segment.Position);
segment.Position = 0;
Equal(3, segment.ReadByte());
Equal(1, segment.Position);
}
public static void ReadApm()
{
using var ms = new MemoryStream(new byte[] { 1, 3, 5, 8, 12 });
using var segment = new StreamSegment(ms);
segment.Adjust(1L, 2L);
var buffer = new byte[4];
var ar = segment.BeginRead(buffer, 0, 2, null, null);
Equal(2, segment.EndRead(ar));
Equal(3, buffer[0]);
Equal(5, buffer[1]);
Equal(0, buffer[2]);
}
public static async Task ReadRangeAsync()
{
using var ms = new MemoryStream(new byte[] { 1, 3, 5, 8, 12 });
using var segment = new StreamSegment(ms);
segment.Adjust(1L, 2L);
var buffer = new byte[4];
Equal(2, await segment.ReadAsync(buffer, 0, buffer.Length));
Equal(3, buffer[0]);
Equal(5, buffer[1]);
Equal(0, buffer[2]);
Equal(0, buffer[3]);
//read from the end of the stream
Equal(-1, segment.ReadByte());
}
public static void ReadByteSequentially()
{
using var ms = new MemoryStream(new byte[] { 1, 3, 5, 8, 12 });
using var segment = new StreamSegment(ms);
Equal(0, segment.Position);
segment.Adjust(0, 2);
Equal(1, segment.ReadByte());
Equal(1, segment.Position);
Equal(3, segment.ReadByte());
Equal(2, segment.Position);
Equal(-1, segment.ReadByte());
Equal(2, segment.Position);
}
public static void ReadRange()
{
var ms = new MemoryStream(new byte[] { 1, 3, 5, 8, 12 });
using (var segment = new StreamSegment(ms))
{
segment.Adjust(1L, 2L);
var buffer = new byte[4];
Equal(2, segment.Read(buffer, 0, buffer.Length));
Equal(3, buffer[0]);
Equal(5, buffer[1]);
Equal(0, buffer[2]);
Equal(0, buffer[3]);
//read from the end of the stream
Equal(-1, segment.ReadByte());
}
}