import qualified Data.ByteString.Lazy.Char8 as B
-- | An exception that can be thrown during a 'Haskell.LSP.Test.Session.Session'
-data SessionException = Timeout
+data SessionException = Timeout (Maybe FromServerMessage)
| NoContentLengthHeader
| UnexpectedMessage String FromServerMessage
| ReplayOutOfOrder FromServerMessage [FromServerMessage]
instance Exception SessionException
instance Show SessionException where
- show Timeout = "Timed out waiting to receive a message from the server."
+ show (Timeout lastMsg) =
+ "Timed out waiting to receive a message from the server." ++
+ case lastMsg of
+ Just msg -> "\nLast message received:\n" ++ B.unpack (encodePretty msg)
+ Nothing -> mempty
show NoContentLengthHeader = "Couldn't read Content-Length header from the server."
show (UnexpectedMessage expected lastMsg) =
"Received an unexpected message from the server:\n" ++
"Was parsing: " ++ expected ++ "\n" ++
- "Last message received: " ++ show lastMsg
+ "Last message received:\n" ++ B.unpack (encodePretty lastMsg)
show (ReplayOutOfOrder received expected) =
let expected' = nub expected
getJsonDiff = lines . B.unpack . encodePretty