Fix tests on travis

[lsp-test.git] / src / Language / Haskell / LSP / Test / Session.hs

diff --git a/src/Language/Haskell/LSP/Test/Session.hs b/src/Language/Haskell/LSP/Test/Session.hs
index a58496d5234dff41854b0f5baba401658daeffc7..9af3a6774150b559500ee544ce63a298b944d387 100644 (file)
--- a/src/Language/Haskell/LSP/Test/Session.hs
+++ b/src/Language/Haskell/LSP/Test/Session.hs
@@ -1,11 +1,14 @@
+{-# LANGUAGE CPP               #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE FlexibleInstances #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE RankNTypes #-}
 
 module Language.Haskell.LSP.Test.Session
   ( Session
   , SessionConfig(..)
+  , defaultConfig
   , SessionMessage(..)
   , SessionContext(..)
   , SessionState(..)
@@ -19,6 +22,8 @@ module Language.Haskell.LSP.Test.Session
   , sendMessage
   , updateState
   , withTimeout
+  , logMsg
+  , LogMsgType(..)
   )
 
 where
@@ -29,6 +34,9 @@ import Control.Lens hiding (List)
 import Control.Monad
 import Control.Monad.IO.Class
 import Control.Monad.Except
+#if __GLASGOW_HASKELL__ >= 806
+import Control.Monad.Fail
+#endif
 import Control.Monad.Trans.Reader (ReaderT, runReaderT)
 import qualified Control.Monad.Trans.Reader as Reader (ask)
 import Control.Monad.Trans.State (StateT, runStateT)
@@ -49,7 +57,8 @@ import Data.Maybe
 import Data.Function
 import Language.Haskell.LSP.Messages
 import Language.Haskell.LSP.Types.Capabilities
-import Language.Haskell.LSP.Types hiding (error)
+import Language.Haskell.LSP.Types
+import Language.Haskell.LSP.Types.Lens hiding (error)
 import Language.Haskell.LSP.VFS
 import Language.Haskell.LSP.Test.Decoding
 import Language.Haskell.LSP.Test.Exceptions
@@ -62,24 +71,31 @@ import System.IO
 -- You can send and receive messages to the server within 'Session' via 'getMessage',
 -- 'sendRequest' and 'sendNotification'.
 --
--- @
--- runSession \"path\/to\/root\/dir\" $ do
---   docItem <- getDocItem "Desktop/simple.hs" "haskell"
---   sendNotification TextDocumentDidOpen (DidOpenTextDocumentParams docItem)
---   diagnostics <- getMessage :: Session PublishDiagnosticsNotification
--- @
+
 type Session = ParserStateReader FromServerMessage SessionState SessionContext IO
 
+#if __GLASGOW_HASKELL__ >= 806
+instance MonadFail Session where
+  fail s = do
+    lastMsg <- fromJust . lastReceivedMessage <$> get
+    liftIO $ throw (UnexpectedMessage s lastMsg)
+#endif
+
 -- | Stuff you can configure for a 'Session'.
 data SessionConfig = SessionConfig
-  {
-    messageTimeout :: Int -- ^ Maximum time to wait for a message in seconds. Defaults to 60.
-  , logStdErr :: Bool -- ^ When True redirects the servers stderr output to haskell-lsp-test's stdout. Defaults to False.
-  , logMessages :: Bool -- ^ When True traces the communication between client and server to stdout. Defaults to True.
+  { messageTimeout :: Int  -- ^ Maximum time to wait for a message in seconds, defaults to 60.
+  , logStdErr      :: Bool -- ^ Redirect the server's stderr to this stdout, defaults to False.
+  , logMessages    :: Bool -- ^ Trace the messages sent and received to stdout, defaults to False.
+  , logColor       :: Bool -- ^ Add ANSI color to the logged messages, defaults to True.
+  , lspConfig      :: Maybe Value -- ^ The initial LSP config as JSON value, defaults to Nothing.
   }
 
+-- | The configuration used in 'Language.Haskell.LSP.Test.runSession'.
+defaultConfig :: SessionConfig
+defaultConfig = SessionConfig 60 False False True Nothing
+
 instance Default SessionConfig where
-  def = SessionConfig 60 False True
+  def = defaultConfig
 
 data SessionMessage = ServerMessage FromServerMessage
                     | TimeoutMessage Int
@@ -158,7 +174,6 @@ runSession context state session = runReaderT (runStateT conduit state) context
       yield msg
       chanSource
 
-
     watchdog :: ConduitM SessionMessage FromServerMessage (StateT SessionState (ReaderT SessionContext IO)) ()
     watchdog = Conduit.awaitForever $ \msg -> do
       curId <- curTimeoutId <$> get
@@ -277,16 +292,8 @@ updateState _ = return ()
 sendMessage :: (MonadIO m, HasReader SessionContext m, ToJSON a) => a -> m ()
 sendMessage msg = do
   h <- serverIn <$> ask
-  let encoded = encodePretty msg
-
-  shouldLog <- asks $ logMessages . config
-  liftIO $ when shouldLog $ do
-  
-    setSGR [SetColor Foreground Dull Cyan]
-    putStrLn $ "--> " ++ B.unpack encoded
-    setSGR [Reset]
-
-    B.hPut h (addHeader encoded)
+  logMsg LogClient msg
+  liftIO $ B.hPut h (addHeader $ encode msg)
 
 -- | Execute a block f that will throw a 'TimeoutException'
 -- after duration seconds. This will override the global timeout
@@ -304,3 +311,26 @@ withTimeout duration f = do
                      overridingTimeout = False
                    }
   return res
+
+data LogMsgType = LogServer | LogClient
+  deriving Eq
+
+-- | Logs the message if the config specified it
+logMsg :: (ToJSON a, MonadIO m, HasReader SessionContext m)
+       => LogMsgType -> a -> m ()
+logMsg t msg = do
+  shouldLog <- asks $ logMessages . config
+  shouldColor <- asks $ logColor . config
+  liftIO $ when shouldLog $ do
+    when shouldColor $ setSGR [SetColor Foreground Dull color]
+    putStrLn $ arrow ++ showPretty msg
+    when shouldColor $ setSGR [Reset]
+
+  where arrow
+          | t == LogServer  = "<-- "
+          | otherwise       = "--> "
+        color
+          | t == LogServer  = Magenta
+          | otherwise       = Cyan
+
+        showPretty = B.unpack . encodePretty