Open Stack

As part of the enforce-unique-instance-uuid-in-db blueprint [1] I'm 
writing a script to scan the database and find any NULL instance_uuid 
records that will cause the new database migration to fail so that 
operators can run this before they run the migration, otherwise the 
migration blocks if these types of records are found.

I have the script written [2], but wanted to also write unit tests for 
it. I guess I assumed the script would go under nova/tools/db like the 
schema_diff.py script, but I'm not sure how to unit test anything 
outside of the nova/nova tree.

Nova's testr configuration is only discovering tests within nova/tests 
[3].  But I don't think I can put the unit tests under nova/tests and 
then import the module from nova/tools.

So I'm a bit stuck.  I could take the easy way out and just throw the 
script under nova/db/sqlalchemy/migrate_repo and put my unit tests under 
nova/tests/db/, and I'd also get pep8 checking with that, but that 
doesn't seem right - but I'm also possibly over-thinking this.

Anyone else have any ideas?

[1] 
https://blueprints.launchpad.net/nova/+spec/enforce-unique-instance-uuid-in-db
[2] https://review.openstack.org/#/c/97946/
[3] http://git.openstack.org/cgit/openstack/nova/tree/.testr.conf#n5

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Thanks,

Matt Riedemann