1 {-# LANGUAGE MultiParamTypeClasses #-}
2 {-# LANGUAGE ScopedTypeVariables #-}
3 {-# LANGUAGE RankNTypes #-}
4 {-# LANGUAGE OverloadedStrings #-}
6 module Language.Haskell.LSP.Test.Parsing
15 , publishDiagnosticsNotification
19 import Control.Applicative
20 import Control.Concurrent
22 import Control.Monad.IO.Class
25 import qualified Data.ByteString.Lazy.Char8 as B
26 import Data.Conduit.Parser
27 import qualified Data.Text as T
29 import Language.Haskell.LSP.Messages
30 import Language.Haskell.LSP.Types
31 import qualified Language.Haskell.LSP.Types.Lens as LSP
32 import Language.Haskell.LSP.Test.Messages
33 import Language.Haskell.LSP.Test.Session
36 -- To receive a message, just specify the type that expect:
39 -- msg1 <- message :: Session ApplyWorkspaceEditRequest
40 -- msg2 <- message :: Session HoverResponse
43 -- 'Language.Haskell.LSP.Test.Session' is actually just a parser
44 -- that operates on messages under the hood. This means that you
45 -- can create and combine parsers to match speicifc sequences of
46 -- messages that you expect.
48 -- For example, if you wanted to match either a definition or
49 -- references request:
51 -- > defOrImpl = (message :: Session DefinitionRequest)
52 -- > <|> (message :: Session ReferencesRequest)
54 -- If you wanted to match any number of telemetry
55 -- notifications immediately followed by a response:
59 -- skipManyTill (message :: Session TelemetryNotification)
63 -- | Consumes and returns the next message, if it satisfies the specified predicate.
66 satisfy :: (FromServerMessage -> Bool) -> Session FromServerMessage
67 satisfy pred = satisfyMaybe (\msg -> if pred msg then Just msg else Nothing)
69 -- | Consumes and returns the result of the specified predicate if it returns `Just`.
72 satisfyMaybe :: (FromServerMessage -> Maybe a) -> Session a
73 satisfyMaybe pred = do
75 skipTimeout <- overridingTimeout <$> get
76 timeoutId <- curTimeoutId <$> get
77 unless skipTimeout $ do
78 chan <- asks messageChan
79 timeout <- asks (messageTimeout . config)
80 void $ liftIO $ forkIO $ do
81 threadDelay (timeout * 1000000)
82 writeChan chan (TimeoutMessage timeoutId)
87 modify $ \s -> s { curTimeoutId = timeoutId + 1 }
89 modify $ \s -> s { lastReceivedMessage = Just x }
97 -- | Matches a message of type @a@.
98 message :: forall a. (Typeable a, FromJSON a) => Session a
100 let parser = decode . encodeMsg :: FromServerMessage -> Maybe a
101 in satisfyMaybe parser
103 -- | Matches if the message is a notification.
104 anyNotification :: Session FromServerMessage
105 anyNotification = satisfy isServerNotification
107 -- | Matches if the message is a request.
108 anyRequest :: Session FromServerMessage
109 anyRequest = satisfy isServerRequest
111 -- | Matches if the message is a response.
112 anyResponse :: Session FromServerMessage
113 anyResponse = satisfy isServerResponse
115 -- | Matches a response for a specific id.
116 responseForId :: forall a. FromJSON a => LspId -> Session (ResponseMessage a)
117 responseForId lid = do
118 let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
119 satisfyMaybe $ \msg -> do
121 guard (z ^. LSP.id == responseId lid)
124 -- | Matches any type of message.
125 anyMessage :: Session FromServerMessage
126 anyMessage = satisfy (const True)
128 -- | A version of encode that encodes FromServerMessages as if they
130 encodeMsg :: FromServerMessage -> B.ByteString
131 encodeMsg = encode . genericToJSON (defaultOptions { sumEncoding = UntaggedValue })
133 -- | Matches if the message is a log message notification or a show message notification/request.
134 loggingNotification :: Session FromServerMessage
135 loggingNotification = satisfy shouldSkip
137 shouldSkip (NotLogMessage _) = True
138 shouldSkip (NotShowMessage _) = True
139 shouldSkip (ReqShowMessage _) = True
142 -- | Matches a 'Language.Haskell.LSP.Test.PublishDiagnosticsNotification'
143 -- (textDocument/publishDiagnostics) notification.
144 publishDiagnosticsNotification :: Session PublishDiagnosticsNotification
145 publishDiagnosticsNotification = satisfyMaybe $
147 NotPublishDiagnostics diags -> Just diags