This patch introduces three EROFS tests which cover compact, extended and chunk-based inodes respectively. Signed-off-by: Yifan Zhao <zhaoyifan@sjtu.edu.cn> Reviewed-by: Glenn Washburn <development@efficientek.com> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>