Add unexpected message exception

[opengl.git] / src / Language / Haskell / LSP / Test / Parsing.hs

diff --git a/src/Language/Haskell/LSP/Test/Parsing.hs b/src/Language/Haskell/LSP/Test/Parsing.hs
index 9e6bdd5c5739f07b9b8590598fe2a1c08cfcae86..fdc2e958bafc45eae1e02deceba80ba4e03657b4 100644 (file)
--- a/src/Language/Haskell/LSP/Test/Parsing.hs
+++ b/src/Language/Haskell/LSP/Test/Parsing.hs
@@ -1,7 +1,7 @@
 {-# LANGUAGE MultiParamTypeClasses #-}
-{-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE RankNTypes #-}
+{-# LANGUAGE OverloadedStrings #-}
 module Language.Haskell.LSP.Test.Parsing where
 
 import Control.Applicative
@@ -22,56 +22,57 @@ satisfy :: (MonadIO m, MonadSessionConfig m) => (a -> Bool) -> ConduitParser a m
 satisfy pred = do
   timeout <- timeout <$> lift sessionConfig
   tId <- liftIO myThreadId
-  liftIO $ forkIO $ do
+  timeoutThread <- liftIO $ forkIO $ do
     threadDelay (timeout * 1000000)
     throwTo tId TimeoutException
   x <- await
+  liftIO $ killThread timeoutThread
   if pred x
     then return x
     else empty
 
 -- | Matches if the message is a notification.
 anyNotification :: (MonadIO m, MonadSessionConfig m) => ConduitParser FromServerMessage m FromServerMessage
-anyNotification = satisfy isServerNotification
+anyNotification = named "Any notification" $ satisfy isServerNotification
 
 notification :: forall m a. (MonadIO m, MonadSessionConfig m, FromJSON a) => ConduitParser FromServerMessage m (NotificationMessage ServerMethod a)
-notification = do
+notification = named "Notification" $ do
   let parser = decode . encodeMsg :: FromServerMessage -> Maybe (NotificationMessage ServerMethod a)
   x <- satisfy (isJust . parser)
-  return $ decodeMsg $ encodeMsg x
+  return $ castMsg x
 
 -- | Matches if the message is a request.
 anyRequest :: (MonadIO m, MonadSessionConfig m) => ConduitParser FromServerMessage m FromServerMessage
-anyRequest = satisfy isServerRequest
+anyRequest = named "Any request" $ satisfy isServerRequest
 
 request :: forall m a b. (MonadIO m, MonadSessionConfig m, FromJSON a, FromJSON b) => ConduitParser FromServerMessage m (RequestMessage ServerMethod a b)
-request = do
+request = named "Request" $ do
   let parser = decode . encodeMsg :: FromServerMessage -> Maybe (RequestMessage ServerMethod a b)
   x <- satisfy (isJust . parser)
-  return $ decodeMsg $ encodeMsg x
+  return $ castMsg x
 
 -- | Matches if the message is a response.
 anyResponse :: (MonadIO m, MonadSessionConfig m) => ConduitParser FromServerMessage m FromServerMessage
-anyResponse = satisfy isServerResponse
+anyResponse = named "Any response" $ satisfy isServerResponse
 
 response :: forall m a. (MonadIO m, MonadSessionConfig m, FromJSON a) => ConduitParser FromServerMessage m (ResponseMessage a)
-response = do
+response = named "Response" $ do
   let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
   x <- satisfy (isJust . parser)
-  return $ decodeMsg $ encodeMsg x
+  return $ castMsg x
+
+-- | A stupid method for getting out the inner message.
+castMsg :: FromJSON a => FromServerMessage -> a
+castMsg = fromMaybe (error "Failed casting a message") . decode . encodeMsg
 
 -- | A version of encode that encodes FromServerMessages as if they
 -- weren't wrapped.
 encodeMsg :: FromServerMessage -> B.ByteString
 encodeMsg = encode . genericToJSON (defaultOptions { sumEncoding = UntaggedValue })
 
-decodeMsg :: FromJSON a => B.ByteString -> a
-decodeMsg x = fromMaybe (error $ "Unexpected message type\nGot:\n " ++ show x)
-                  (decode x)
-
 -- | Matches if the message is a log message notification or a show message notification/request.
 loggingNotification :: (MonadIO m, MonadSessionConfig m) => ConduitParser FromServerMessage m FromServerMessage
-loggingNotification = satisfy shouldSkip
+loggingNotification = named "Logging notification" $ satisfy shouldSkip
   where
     shouldSkip (NotLogMessage _) = True
     shouldSkip (NotShowMessage _) = True
@@ -79,7 +80,7 @@ loggingNotification = satisfy shouldSkip
     shouldSkip _ = False
 
 publishDiagnosticsNotification :: (MonadIO m, MonadSessionConfig m) => ConduitParser FromServerMessage m PublishDiagnosticsNotification
-publishDiagnosticsNotification = do
+publishDiagnosticsNotification = named "Publish diagnostics notification" $ do
   NotPublishDiagnostics diags <- satisfy test
   return diags
   where test (NotPublishDiagnostics _) = True