Test suite

[bdrewery]

There should really be a test suite for this. Have it create a zpool on file or memory device. Create a jail, delegate the pool to the jail. Using jexec, execute beadm inside the jail, testing various scenarios and setups. Then test the resulting zfs list mount, and checking properties on cloned datasets, ensuring they match expectations. After every test, the jail should be rolled back to a clean starting point.

I'm happy to work on something like this, just documenting here for now for discussion.