public void TestTrim()
{
var buf = new x2net.Buffer();
buf.EnsureCapacity(buf.BlockSize); // numBlocks + 1
buf.Position = 24;
// front <= pos
buf.Trim();
Assert.Equal(buf.BlockSize - 24, buf.Length);
Assert.Equal(0, buf.Position);
buf.Position = (int)buf.Length;
// reset
buf.Trim();
Assert.Equal(0, buf.Length);
Assert.Equal(0, buf.Position);
buf.EnsureCapacity(buf.BlockSize);
buf.MarkToRead(1024);
buf.Position = 24;
// front <= marker
buf.Trim();
Assert.Equal(buf.BlockSize - 1024, buf.Length);
Assert.Equal(0, buf.Position);
}