I like the helper functions. It would be great if we could make anotherAquireProvisionerJob function to mark jobs as complete. Just mutate the job fields with some "test only" query we have.

Last comment, can merge without. Maybe we should not name thisCreateWorkspace, because we use that exact wording in our API related helpers which actually goes through theCreate flow and has all the deps correct.

Maybe name itInsertWorkspace?PutWorkspace? Some other word?

Nice work, I think this is a huge improvement for writing tests!

I did notice CI is still quite unhappy:

                      - pq: insert or update on table "workspace_builds" violates foreign key constraint "workspace_builds_job_id_fkey"

Perhaps just a case of missing ID in a call to dbgen (in dbfake).