module Language.Haskell.LSP.Test.Parsing
( -- $receiving
satisfy
+ , satisfyMaybe
, message
, anyRequest
, anyResponse
import Control.Monad
import Data.Aeson
import qualified Data.ByteString.Lazy.Char8 as B
-import Data.Conduit.Parser
-import Data.Maybe
+import Data.Conduit.Parser hiding (named)
+import qualified Data.Conduit.Parser (named)
import qualified Data.Text as T
import Data.Typeable
import Language.Haskell.LSP.Messages
--
-- @since 0.5.2.0
satisfy :: (FromServerMessage -> Bool) -> Session FromServerMessage
-satisfy pred = do
+satisfy pred = satisfyMaybe (\msg -> if pred msg then Just msg else Nothing)
+
+-- | Consumes and returns the result of the specified predicate if it returns `Just`.
+--
+-- @since 0.6.1.0
+satisfyMaybe :: (FromServerMessage -> Maybe a) -> Session a
+satisfyMaybe pred = do
skipTimeout <- overridingTimeout <$> get
timeoutId <- curTimeoutId <$> get
threadDelay (timeout * 1000000)
writeChan chan (TimeoutMessage timeoutId)
- x <- await
+ x <- Session await
unless skipTimeout $
modify $ \s -> s { curTimeoutId = timeoutId + 1 }
modify $ \s -> s { lastReceivedMessage = Just x }
- if pred x
- then do
+ case pred x of
+ Just a -> do
logMsg LogServer x
- return x
- else empty
+ return a
+ Nothing -> empty
+
+named :: T.Text -> Session a -> Session a
+named s (Session x) = Session (Data.Conduit.Parser.named s x)
-- | Matches a message of type @a@.
message :: forall a. (Typeable a, FromJSON a) => Session a
message =
let parser = decode . encodeMsg :: FromServerMessage -> Maybe a
in named (T.pack $ show $ head $ snd $ splitTyConApp $ last $ typeRepArgs $ typeOf parser) $
- castMsg <$> satisfy (isJust . parser)
+ satisfyMaybe parser
-- | Matches if the message is a notification.
anyNotification :: Session FromServerMessage
responseForId :: forall a. FromJSON a => LspId -> Session (ResponseMessage a)
responseForId lid = named (T.pack $ "Response for id: " ++ show lid) $ do
let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
- x <- satisfy (maybe False (\z -> z ^. LSP.id == responseId lid) . parser)
- return $ castMsg x
+ satisfyMaybe $ \msg -> do
+ z <- parser msg
+ guard (z ^. LSP.id == responseId lid)
+ pure z
-- | Matches any type of message.
anyMessage :: Session FromServerMessage
anyMessage = satisfy (const True)
--- | 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
-- | Matches a 'Language.Haskell.LSP.Test.PublishDiagnosticsNotification'
-- (textDocument/publishDiagnostics) notification.
publishDiagnosticsNotification :: Session PublishDiagnosticsNotification
-publishDiagnosticsNotification = named "Publish diagnostics notification" $ do
- NotPublishDiagnostics diags <- satisfy test
- return diags
- where test (NotPublishDiagnostics _) = True
- test _ = False
+publishDiagnosticsNotification = named "Publish diagnostics notification" $
+ satisfyMaybe $ \msg -> case msg of
+ NotPublishDiagnostics diags -> Just diags
+ _ -> Nothing