Run the node on an already synced testnet folder. Check that it upgrades the bloc index on first launch, and do not do it again after that.
Bump version to 0.22.8 by editing src/CMakeFiles.txt and verify the uprgade takes place again, but this time is extremely quick and simply as most of the work has already been done.
Run this on a prunned directory, and ensure it fails with an error message telling me to reindex.
Depends on D8315 and D8318