SubscriptionCheckpointInventoryMock.hs

module Test.SubscriptionCheckpointInventoryMock (spec) where

import Control.Monad.IO.Class (liftIO)
import Data.IORef (IORef, modifyIORef', newIORef, readIORef)
import Data.Time.Calendar (fromGregorian)
import Data.Time.Clock (UTCTime (..))
import Data.Vector qualified as V
import Effectful (Eff, IOE, runEff, (:>))
import Effectful.Dispatch.Dynamic (interpret_)
import Kiroku.Store.Effect (Store (..))
import Kiroku.Store.Subscription (subscriptionCheckpointInventory)
import Kiroku.Store.Subscription.Types
import Kiroku.Store.Types (GlobalPosition (..))
import Test.Hspec

spec :: Spec
spec = describe "SubscriptionCheckpointInventory mock interpreter" $ do
  it "returns a public inventory through one Store effect call" $ do
    calls <- newIORef (0 :: Int)
    let updatedAt = UTCTime (fromGregorian 2026 8 9) 0
        expected =
          SubscriptionCheckpointInventory
            (GlobalPosition 17)
            ( V.singleton $
                SubscriptionCheckpoint
                  (SubscriptionName "mock")
                  3
                  (GlobalPosition 11)
                  updatedAt
            )
    actual <- runEff $ runInventoryMock calls expected subscriptionCheckpointInventory
    actual `shouldBe` expected
    readIORef calls `shouldReturn` 1

runInventoryMock ::
  (IOE :> es) =>
  IORef Int ->
  SubscriptionCheckpointInventory ->
  Eff (Store : es) a ->
  Eff es a
runInventoryMock calls expected = interpret_ $ \case
  GetSubscriptionCheckpointInventory -> do
    liftIO $ modifyIORef' calls (+ 1)
    pure expected
  _ -> error "unexpected Store operation in inventory mock"