hls-graph-1.7.0.0: test/DatabaseSpec.hs

{-# LANGUAGE OverloadedLists #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE ScopedTypeVariables #-}
module DatabaseSpec where

import Control.Concurrent.STM
import Development.IDE.Graph (shakeOptions)
import Development.IDE.Graph.Database (shakeNewDatabase, shakeRunDatabase)
import Development.IDE.Graph.Internal.Action (apply1)
import Development.IDE.Graph.Internal.Types
import Development.IDE.Graph.Rule
import Example
import qualified StmContainers.Map as STM
import Test.Hspec
import System.Time.Extra (timeout)

spec :: Spec
spec = do
    describe "Evaluation" $ do
        it "detects cycles" $ do
            db <- shakeNewDatabase shakeOptions $ do
                ruleBool
                addRule $ \Rule old mode -> do
                    True <- apply1 (Rule @Bool)
                    return $ RunResult ChangedRecomputeDiff "" ()
            let res = shakeRunDatabase db $ pure $ apply1 (Rule @())
            timeout 1 res `shouldThrow` \StackException{} -> True