This change increases the coverage and makes the unit test more
realistic, and furthermore makes the following refactoring easier.
Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: If8177b9cff888bf26e9a8e9830d4e915d264523f
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5247
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>