Add tests to datalink::dummy
Add tests to datalink::dummy

fsck/libpnet,fsck/libpnet,libpnet/libpnet,mrmonday/libpnet,mrmonday/libpnet,fsck/libpnet,libpnet/libpnet,symphorien/libpnet,symphorien/libpnet,fsck/libpnet,libpnet/libpnet,mrmonday/libpnet,symphorien/libpnet,symphorien/libpnet,mrmonday/libpnet,libpnet/libpnet