mailbox-station-conformance

Vitest-driven conformance battery for verifying user-supplied StoreAdapter implementations against the documented invariants in mailbox-station (atomic commit, idempotency on (accountId, messageId), lease-based claims, state transitions, etc.).

import { describe } from "vitest"
import { runStoreConformance } from "mailbox-station-conformance"
import { createMyStore } from "./my-store.js"

describe("my Store adapter", () => {
  runStoreConformance({
    name: "my-store",
    makeStore: () => createMyStore(),
  })
})

If your adapter passes, it satisfies every contract mailbox-station relies on. Full details: github.com/porkytheblack/mail-station.