Function deferredMutation

packages/offline-transactions/tests/offline-e2e.test.ts:430–450

(
      params: OfflineMutationFnParams & { attempt: number },
    )

    let env: ReturnType<typeof createTestOfflineEnvironment> | undefined

    const deferredMutation = async (
      params: OfflineMutationFnParams & { attempt: number },
    ) => {
      const runtimeEnv = env
      if (!runtimeEnv) {
        throw new Error(`env not initialized`)
      }

      const mutations = params.transaction.mutations as Array<
        PendingMutation<TestItem>
      >

      await new Promise<void>((resolve) => {
        pendingResolvers.push(() => {
          runtimeEnv.applyMutations(mutations)
          resolve()
        })
      })

      return { ok: true, mutations }
    }

    env = createTestOfflineEnvironment({
      mutationFn: deferredMutation,