Package storetest is the conformance suite every Weave store backend runs.
Each case populates the fields the dashboard reads (metadata, offsets,
timestamps, tenants), because a suite that only builds empty structs tests
the absence of those features. Assertions compare identities, never bare
counts: a count passes when the wrong rows come back in the right number.
Planter writes doc straight into s's storage, with none of the store's
checks, the way a v1.8 install wrote rows with an empty tenant. It only
exists for the cases RunLegacy runs; the store API can't write such a row.