I started adding tests along with v0.5 and reached a good coverage in v0.6. Of course, I'll have to extend them to check if everything works in different scenarios.
So far, I've tested pgMemento mostly with workflows from one of my other projects, the 3D City Database. There, I'm importing 3d city models into a PostGIS-enabled database. The schema contains a lot of relationships between tables, even self-references. Thus, import and delete operations, for example, can cover multiple tables. Being able to revert such processes has been one of my major goals.
What's open to test
I haven't worked with table inheritence or table partitioning, yet, so I can't tell if they impose some problems to the logging behaviour of pgMemento.