The gate tests use a canned shell runner, and two of them build a real
slopo-shaped SQLite file to prove the warm-database hole is closed: the summary
line says zero new units while the database says 8,607 unembedded, and the gate
must believe the database.
Those fixtures insert in one transaction. Row-by-row they were 8,607 individual
fsyncs, which took two minutes and timed the suite out - worth knowing before
writing another one.
