Try force decoding of golden test files as utf8

Author: lukel97

test/functional/Eval.hs

@@ -9,7 +9,8 @@ where
 
 import           Control.Applicative.Combinators (skipManyTill)
 import           Control.Monad.IO.Class          (MonadIO (liftIO))
-import qualified Data.Text.IO                    as T
+import qualified Data.ByteString                       as B
+import qualified Data.Text.Encoding                    as T
 import           Language.Haskell.LSP.Test
 import           Language.Haskell.LSP.Types      (ApplyWorkspaceEditRequest, CodeLens (CodeLens, _command, _range),
                                                   Command (_title),
@@ -99,7 +100,7 @@ goldenTest input = runSession hlsCommand fullCaps evalPath $ do
   executeCommand c
   _resp :: ApplyWorkspaceEditRequest <- skipManyTill anyMessage message
   edited <- documentContents doc
-  expected <- liftIO $ T.readFile $ evalPath </> input <.> "expected"
+  expected <- liftIO $ fmap T.decodeUtf8 $ B.readFile $ evalPath </> input <.> "expected"
   liftIO $ edited @?= expected
 
 evalPath :: FilePath