test/Golden/Utils.hs

   1 module Golden.Utils where
   2
   3 import Control.Monad (Monad(..))
   4 import Data.Either (Either(..))
   5 import Data.Function (($))
   6 import Data.Semigroup (Semigroup(..))
   7 import Data.String (String)
   8 import System.IO (IO, FilePath)
   9 import System.IO.Unsafe (unsafePerformIO)
  10 import qualified Data.ByteString.Lazy as BSL
  11 import qualified Data.IORef as IORef
  12
  13 import qualified Data.Text.Lazy as TL
  14 import qualified Data.Text.Lazy.Encoding as TL
  15 import qualified Language.Haskell.TH.Syntax as TH
  16 import Paths_symantic_parser
  17
  18 getGoldenDir :: FilePath -> FilePath
  19 getGoldenDir p = unsafePerformIO $ getDataFileName $ "test/Golden/" <> p
  20
  21 goldenDiff :: FilePath -> FilePath -> [String]
  22 goldenDiff ref new = ["diff", "-u", "-w", "-B", ref, new]
  23
  24 -- | Resetting 'TH.counter' makes 'makeLetName' deterministic,
  25 -- except when GHC or executable flags change, like profiling
  26 -- or even --accept unfortunately,
  27 -- in those case the 'goldensMachine' tests may fail
  28 -- due to a different numbering of the 'def' and 'ref' combinators.
  29 -- Hence 'ShowLetName' is used with 'False'.
  30 resetTHNameCounter :: IO ()
  31 resetTHNameCounter = IORef.writeIORef TH.counter 0
  32
  33 unLeft :: Either String BSL.ByteString -> IO BSL.ByteString
  34 unLeft lr = case lr of
  35   Left err -> return $ TL.encodeUtf8 $ TL.pack err
  36   Right a  -> return a