sbc.write( ByteBuffer.wrap( "CONTENT\n?!".getBytes() ) );
assertEquals( 10L, sbc.position() );
assertEquals( 10L, sbc.size() );
sbc.position( 1L );
ByteBuffer buffer = ByteBuffer.allocate( 8 );
sbc.read( buffer );
assertEquals( "ONTENT\n?", new String( buffer.array() ) );
assertEquals( 9L, sbc.position() );