{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE RankNTypes #-}
+-- | A testing tool for replaying recorded client logs back to a server,
+-- and validating that the server output matches up with another log.
module Language.Haskell.LSP.Test.Recorded
( replay
)
where
import Control.Concurrent
+import Control.Monad.Trans.Class
+import Control.Monad.Trans.Reader
import Data.Default
-import Language.Haskell.LSP.Control as Control
import qualified Data.ByteString.Lazy.Char8 as B
+import Data.List
+import Language.Haskell.LSP.Capture
+import Language.Haskell.LSP.Messages
import Language.Haskell.LSP.Core
import qualified Language.Haskell.LSP.Types as LSP
import Data.Aeson
-import Data.List
import Data.Maybe
import Control.Lens
import Control.Monad
import System.IO
+import System.Directory
import System.Process
+import Language.Haskell.LSP.Test.Files
+import Language.Haskell.LSP.Test.Parsing
-- | Replays a recorded client output and
-- makes sure it matches up with an expected response.
-replay :: FilePath -- ^ The client output to replay to the server.
- -> FilePath -- ^ The expected response from the server.
- -> IO Int
-replay cfp sfp = do
+replay
+ :: FilePath -- ^ The recorded session file.
+ -> FilePath -- ^ The root directory of the project
+ -> IO Bool
+replay sessionFp curRootDir = do
- (Just serverIn, Just serverOut, _, _) <- createProcess
- (proc "hie" ["--lsp", "-l", "/tmp/hie.log", "-d"]) { std_in = CreatePipe
- , std_out = CreatePipe
- }
+ -- need to keep hold of current directory since haskell-lsp changes it
+ prevDir <- getCurrentDirectory
+
+ (Just serverIn, Just serverOut, _, serverProc) <- createProcess
+ (proc "hie" ["--lsp", "-l", "/tmp/hie.log"]) { std_in = CreatePipe , std_out = CreatePipe }
hSetBuffering serverIn NoBuffering
hSetBuffering serverOut NoBuffering
- -- todo: use qsem
-- whether to send the next request
reqSema <- newEmptyMVar :: IO (MVar LSP.LspIdRsp)
-- whether to send the next response
rspSema <- newEmptyMVar :: IO (MVar LSP.LspId)
let semas = (reqSema, rspSema)
- -- the recorded client input to the server
- clientRecIn <- openFile cfp ReadMode
- serverRecIn <- openFile sfp ReadMode
- null <- openFile "/dev/null" WriteMode
+ didPass <- newEmptyMVar
+
+ entries <- B.lines <$> B.readFile sessionFp
+ -- decode session
+ let unswappedEvents = map (fromJust . decode) entries
- expectedMsgs <- getAllMessages serverRecIn
+ events <- swapFiles curRootDir unswappedEvents
+
+ let clientEvents = map (\(FromClient _ msg) -> msg) $ filter isClientMsg events
+ serverEvents = map (\(FromServer _ msg) -> msg) $ filter isServerMsg events
-- listen to server
- forkIO $ listenServer expectedMsgs serverOut semas
-
- -- send initialize request ourselves since haskell-lsp consumes it
- -- rest are handled via `handlers`
- sendInitialize clientRecIn serverIn
-
- -- wait for initialize response
- putStrLn "Waiting for initialzie response"
- takeMVar reqSema
- putStrLn "Got initialize response"
-
- Control.runWithHandles clientRecIn
- null
- (const $ Right (), const $ return Nothing)
- (handlers serverIn semas)
- def
- Nothing
- Nothing
+ forkIO $ runReaderT (listenServer serverEvents serverOut semas) didPass
+
+ forM_ clientEvents (processClient serverIn)
+
+ print events
+
+ result <- takeMVar didPass
+ terminateProcess serverProc
+
+ -- restore directory
+ setCurrentDirectory prevDir
+
+ return result
where
- listenServer :: [B.ByteString] -> Handle -> (MVar LSP.LspIdRsp, MVar LSP.LspId) -> IO ()
- listenServer expectedMsgs h semas@(reqSema, rspSema) = do
- msg <- getNextMessage h
- putStrLn $ "Remaining messages " ++ show (length expectedMsgs)
- if inRightOrder msg expectedMsgs
- then do
-
- -- if we got a request response unblock the replay waiting for a response
- whenResponse msg $ \res -> do
- putStrLn ("Got response for id " ++ show (res ^. LSP.id))
- putMVar reqSema (res ^. LSP.id)
-
- whenRequest msg $ \req -> do
- putStrLn ("Got request for id " ++ show (req ^. LSP.id) ++ " " ++ show (req ^. LSP.method))
- putMVar rspSema (req ^. LSP.id)
-
- listenServer (delete msg expectedMsgs) h semas
- else error $ "Got: " ++ show msg ++ "\n Expected: " ++ show (head (filter (not . isNotification) expectedMsgs))
-
- sendInitialize recH serverH = do
- message <- getNextMessage recH
- B.hPut serverH (addHeader message)
- putStrLn $ "Sent initialize response " ++ show message
- -- bring the file back to the start for haskell-lsp
- hSeek recH AbsoluteSeek 0
-
-isNotification :: B.ByteString -> Bool
-isNotification msg = isJust (decode msg :: Maybe (LSP.NotificationMessage Value Value))
-
-whenResponse :: B.ByteString -> (LSP.ResponseMessage Value -> IO ()) -> IO ()
-whenResponse msg f =
- case decode msg :: Maybe (LSP.ResponseMessage Value) of
- Just msg' -> when (isJust (msg' ^. LSP.result)) (f msg')
- _ -> return ()
-
-whenRequest :: B.ByteString -> (LSP.RequestMessage Value Value Value -> IO ()) -> IO ()
-whenRequest msg = forM_ (decode msg :: (Maybe (LSP.RequestMessage Value Value Value)))
+ isClientMsg (FromClient _ _) = True
+ isClientMsg _ = False
--- TODO: QuickCheck tests?
--- | Checks wether or not the message appears in the right order
--- @ N1 N2 N3 REQ1 N4 N5 REQ2 RES1 @
--- given N2, notification order doesn't matter.
--- @ N1 N3 REQ1 N4 N5 REQ2 RES1 @
--- given REQ1
--- @ N1 N3 N4 N5 REQ2 RES1 @
--- given RES1
--- @ N1 N3 N4 N5 XXXX RES1 @ False!
--- Order of requests and responses matter
-inRightOrder :: B.ByteString -> [B.ByteString] -> Bool
-inRightOrder _ [] = error "why is this empty"
-inRightOrder received msgs = received `elem` valid
- where valid = takeWhile canSkip msgs ++ firstNonSkip
- -- we don't care about the order of notifications
- canSkip = isNotification
- nonSkip = dropWhile canSkip msgs
- firstNonSkip
- | null nonSkip = []
- | otherwise = [head nonSkip]
-
-getAllMessages :: Handle -> IO [B.ByteString]
-getAllMessages h = do
- done <- hIsEOF h
- if done
- then return []
- else do
- msg <- getNextMessage h
- (msg:) <$> getAllMessages h
-
--- | Fetches the next message bytes based on
--- the Content-Length header
-getNextMessage :: Handle -> IO B.ByteString
-getNextMessage h = do
- headers <- getHeaders h
- case read . init <$> lookup "Content-Length" headers of
- Nothing -> error "Couldn't read Content-Length header"
- Just size -> B.hGet h size
-
-
-handlers :: Handle -> (MVar LSP.LspIdRsp, MVar LSP.LspId) -> Handlers
-handlers serverH (reqSema, rspSema) = def
- {
- -- Requests
- hoverHandler = Just request
- , completionHandler = Just request
- , completionResolveHandler = Just request
- , signatureHelpHandler = Just request
- , definitionHandler = Just request
- , referencesHandler = Just request
- , documentHighlightHandler = Just request
- , documentSymbolHandler = Just request
- , workspaceSymbolHandler = Just request
- , codeActionHandler = Just request
- , codeLensHandler = Just request
- , codeLensResolveHandler = Just request
- , documentFormattingHandler = Just request
- , documentRangeFormattingHandler = Just request
- , documentTypeFormattingHandler = Just request
- , renameHandler = Just request
- , documentLinkHandler = Just request
- , documentLinkResolveHandler = Just request
- , executeCommandHandler = Just request
- -- Notifications
- , didChangeConfigurationParamsHandler = Just notification
- , didOpenTextDocumentNotificationHandler = Just notification
- , didChangeTextDocumentNotificationHandler = Just notification
- , didCloseTextDocumentNotificationHandler = Just notification
- , didSaveTextDocumentNotificationHandler = Just notification
- , didChangeWatchedFilesNotificationHandler = Just notification
- , initializedHandler = Just notification
- , willSaveTextDocumentNotificationHandler = Just notification
- , cancelNotificationHandler = Just notification
- -- Responses
- , responseHandler = Just response
- }
+ isServerMsg (FromServer _ _) = True
+ isServerMsg _ = False
+
+processEvent :: Handle -> MVar LSP.LspId -> MVar LSP.LspIdRsp -> Event -> IO ()
+processEvent serverH rspSema reqSema (FromClient _ msg) = processClient serverH rspSema reqSema msg
+processEvent _ _ _ (FromServer _ msg) = processServer msg
+
+processClient
+ :: Handle -> MVar LSP.LspId -> MVar LSP.LspIdRsp -> FromClientMessage -> IO ()
+processClient serverH rspSema reqSema msg = case msg of
+ ReqInitialize m -> request m
+ ReqShutdown m -> request m
+ ReqHover m -> request m
+ ReqCompletion m -> request m
+ ReqCompletionItemResolve m -> request m
+ ReqSignatureHelp m -> request m
+ ReqDefinition m -> request m
+ ReqFindReferences m -> request m
+ ReqDocumentHighlights m -> request m
+ ReqDocumentSymbols m -> request m
+ ReqWorkspaceSymbols m -> request m
+ ReqCodeAction m -> request m
+ ReqCodeLens m -> request m
+ ReqCodeLensResolve m -> request m
+ ReqDocumentFormatting m -> request m
+ ReqDocumentRangeFormatting m -> request m
+ ReqDocumentOnTypeFormatting m -> request m
+ ReqRename m -> request m
+ ReqExecuteCommand m -> request m
+ ReqDocumentLink m -> request m
+ ReqDocumentLinkResolve m -> request m
+ ReqWillSaveWaitUntil m -> request m
where
- notification m = do
- B.hPut serverH $ addHeader (encode m)
- putStrLn "Sent a notification"
+ -- TODO: May need to prevent premature exit notification being sent
+ notification msg@(LSP.NotificationMessage _ LSP.Exit _) = do
+ putStrLn "Will send exit notification soon"
+ threadDelay 10000000
+ B.hPut serverH $ addHeader (encode msg)
+ notification msg@(LSP.NotificationMessage _ m _) = do
+ B.hPut serverH $ addHeader (encode msg)
+
+ putStrLn $ "Sent a notification " ++ show m
request msg@(LSP.RequestMessage _ id m _) = do
+ when (m == LSP.TextDocumentDocumentSymbol) $ threadDelay 5000000
+
B.hPut serverH $ addHeader (encode msg)
- putStrLn $ "Sent a request id " ++ show id ++ ": " ++ show m ++ "\nWaiting for a response"
+ putStrLn
+ $ "Sent a request id "
+ ++ show id
+ ++ ": "
+ ++ show m
+ ++ "\nWaiting for a response"
rspId <- takeMVar reqSema
- if LSP.responseId id /= rspId
- then error $ "Expected id " ++ show id ++ ", got " ++ show rspId
- else putStrLn $ "Got a response for request id " ++ show id ++ ": " ++ show m
+ when (LSP.responseId id /= rspId)
+ $ error
+ $ "Expected id "
+ ++ show id
+ ++ ", got "
+ ++ show rspId
response msg@(LSP.ResponseMessage _ id _ _) = do
putStrLn $ "Waiting for request id " ++ show id ++ " from the server"
B.hPut serverH $ addHeader (encode msg)
putStrLn $ "Sent response to request id " ++ show id
-addHeader :: B.ByteString -> B.ByteString
-addHeader content = B.concat
- [ "Content-Length: "
- , B.pack $ show $ B.length content
- , "\r\n"
- , "\r\n"
- , content
- ]
-
-getHeaders :: Handle -> IO [(String, String)]
-getHeaders h = do
- l <- hGetLine h
- let (name, val) = span (/= ':') l
- if null val then return [] else ((name, drop 2 val) :) <$> getHeaders h
+-- | The internal monad for tests that can fail or pass,
+-- ending execution early.
+type Session = ReaderT (MVar Bool) IO
+
+-- TODO: Make return type polymoprhic more like error
+failSession :: String -> Session ()
+failSession reason = do
+ lift $ putStrLn reason
+ passVar <- ask
+ lift $ putMVar passVar False
+
+passSession :: Session ()
+passSession = do
+ passVar <- ask
+ lift $ putMVar passVar True
+
+-- | Listens to the server output, makes sure it matches the record and
+-- signals any semaphores
+listenServer :: [FromServerMessage] -> Handle -> (MVar LSP.LspIdRsp, MVar LSP.LspId) -> Session ()
+listenServer [] _ _ = passSession
+listenServer expectedMsgs h semas@(reqSema, rspSema) = do
+ msg <- lift $ getNextMessage h
+
+ newExpectedMsgs <- case decode msg of
+ Just m -> request m
+ Nothing -> case decode msg of
+ Just m -> notification m
+ Nothing -> case decode msg of
+ Just m -> response m
+ Nothing -> failSession "Malformed message" >> return expectedMsgs
+
+ listenServer newExpectedMsgs h semas
+
+ where response :: LSP.ResponseMessage a -> Session [FromServerMessage]
+ response res = do
+ lift $ putStrLn $ "Got response for id " ++ show (res ^. LSP.id)
+
+ lift $ print res
+
+ checkOrder res
+
+ lift $ putMVar reqSema (res ^. LSP.id) -- unblock the handler waiting to send a request
+
+ markReceived res
+
+ request :: LSP.RequestMessage LSP.ServerMethod a b -> Session [FromServerMessage]
+ request req = do
+ lift $ putStrLn $ "Got request for id " ++ show (req ^. LSP.id) ++ " " ++ show (req ^. LSP.method)
+
+ lift $ print req
+
+ checkOrder req
+
+ lift $ putMVar rspSema (req ^. LSP.id) -- unblock the handler waiting for a response
+
+ markReceived req
+
+ notification :: LSP.NotificationMessage LSP.ServerMethod a -> Session [FromServerMessage]
+ notification n = do
+ lift $ putStrLn $ "Got notification " ++ show (n ^. LSP.method)
+ lift $ print n
+
+ lift $ putStrLn $ show (length (filter isNotification expectedMsgs) - 1) ++ " notifications remaining"
+
+ if n ^. LSP.method == LSP.WindowLogMessage
+ then return expectedMsgs
+ else markReceived n
+
+ checkOrder msg = unless (inRightOrder msg expectedMsgs) $ do
+ let (Just expected) = decode firstExpected
+ _ = expected == msg -- make expected type same as res
+ failSession ("Out of order\nExpected\n" ++ show expected ++ "\nGot\n" ++ show msg ++ "\n")
+
+ markReceived :: Eq a => a -> [FromServerMessage] -> Session [FromServerMessage]
+ markReceived msg =
+ -- TODO: Find some way of equating FromServerMessage and LSP.ResponseMessage etc.
+ let new = delete msg expectedMsgs
+ in if new == expectedMsgs
+ then failSession ("Unexpected message: " ++ show msg) >> return new
+ else return new
+
+ firstExpected = head $ filter (not . isNotification) expectedMsgs
+
+isNotification :: FromServerMessage -> Bool
+isNotification (NotPublishDiagnostics _) = True
+isNotification (NotLogMessage _) = True
+isNotification (NotShowMessage _) = True
+isNotification (NotCancelRequestFromServer _) = True
+isNotification _ = False
+
+-- TODO: QuickCheck tests?
+-- | Checks wether or not the message appears in the right order
+-- @ N1 N2 N3 REQ1 N4 N5 REQ2 RES1 @
+-- given N2, notification order doesn't matter.
+-- @ N1 N3 REQ1 N4 N5 REQ2 RES1 @
+-- given REQ1
+-- @ N1 N3 N4 N5 REQ2 RES1 @
+-- given RES1
+-- @ N1 N3 N4 N5 XXXX RES1 @ False!
+-- Order of requests and responses matter
+inRightOrder :: (FromJSON a, Eq a) => a -> [B.ByteString] -> Bool
+
+inRightOrder _ [] = error "Why is this empty"
+-- inRightOrder (LSP.NotificationMessage _ _ _) _ = True
+
+inRightOrder received (expected:msgs)
+ | Just received == decode expected = True
+ | isNotification expected = inRightOrder received msgs
+ | otherwise = False
\ No newline at end of file
projects / lsp-test.git / blobdiff