1 module Language.Haskell.LSP.Test.Exceptions where
3 import Control.Exception
4 import Language.Haskell.LSP.Messages
5 import Language.Haskell.LSP.Types
6 import Data.Aeson.Encode.Pretty
7 import Data.Algorithm.Diff
8 import Data.Algorithm.DiffOutput
10 import qualified Data.ByteString.Lazy.Char8 as B
12 data SessionException = Timeout
13 | UnexpectedMessage String FromServerMessage
14 | ReplayOutOfOrder FromServerMessage [FromServerMessage]
15 | UnexpectedDiagnostics
16 | IncorrectApplyEditRequest String
17 | UnexpectedResponseError LspIdRsp ResponseError
20 instance Exception SessionException
22 instance Show SessionException where
23 show Timeout = "Timed out waiting to receive a message from the server."
24 show (UnexpectedMessage expected lastMsg) =
25 "Received an unexpected message from the server:\n" ++
26 "Was parsing: " ++ expected ++ "\n" ++
27 "Last message received: " ++ show lastMsg
28 show (ReplayOutOfOrder received expected) =
29 let expected' = nub expected
30 getJsonDiff = lines . B.unpack . encodePretty
31 showExp exp = B.unpack (encodePretty exp) ++ "\nDiff:\n" ++
32 ppDiff (getGroupedDiff (getJsonDiff received) (getJsonDiff exp))
33 in "Replay is out of order:\n" ++
34 -- Print json so its a bit easier to update the session logs
35 "Received from server:\n" ++ B.unpack (encodePretty received) ++ "\n" ++
36 "Expected one of:\n" ++ unlines (map showExp expected')
37 show UnexpectedDiagnostics = "Unexpectedly received diagnostics from the server."
38 show (IncorrectApplyEditRequest msgStr) = "ApplyEditRequest didn't contain document, instead received:\n"
40 show (UnexpectedResponseError lid e) = "Received an exepected error in a response for id " ++ show lid ++ ":\n"
43 anySessionException :: SessionException -> Bool
44 anySessionException = const True