1 {-# LANGUAGE OverloadedStrings #-}
2 {-# LANGUAGE FlexibleContexts #-}
3 -- | A testing tool for replaying recorded client logs back to a server,
4 -- and validating that the server output matches up with another log.
5 module Language.Haskell.LSP.Test.Recorded
10 import Control.Concurrent
11 import Control.Monad.Trans.Class
12 import Control.Monad.Trans.Reader
14 import Language.Haskell.LSP.Control as Control
15 import qualified Data.ByteString.Lazy.Char8 as B
16 import Language.Haskell.LSP.Core
17 import qualified Language.Haskell.LSP.Types as LSP
23 import System.Directory
25 import Language.Haskell.LSP.Test.Files
26 import Language.Haskell.LSP.Test.Parsing
28 -- | Replays a recorded client output and
29 -- makes sure it matches up with an expected response.
31 :: FilePath -- ^ The client output to replay to the server.
32 -> FilePath -- ^ The expected response from the server.
33 -> FilePath -- ^ The root directory of the project
35 replay cfp sfp curRootDir = do
37 -- need to keep hold of current directory since haskell-lsp changes it
38 prevDir <- getCurrentDirectory
40 (Just serverIn, Just serverOut, _, serverProc) <- createProcess
41 (proc "hie" ["--lsp", "-l", "/tmp/hie.log"]) { std_in = CreatePipe , std_out = CreatePipe }
43 hSetBuffering serverIn NoBuffering
44 hSetBuffering serverOut NoBuffering
46 -- whether to send the next request
47 reqSema <- newEmptyMVar :: IO (MVar LSP.LspIdRsp)
48 -- whether to send the next response
49 rspSema <- newEmptyMVar :: IO (MVar LSP.LspId)
50 let semas = (reqSema, rspSema)
52 didPass <- newEmptyMVar
54 -- the recorded client input to the server
55 clientRecIn <- openFile cfp ReadMode
56 serverRecIn <- openFile sfp ReadMode
57 null <- openFile "/dev/null" WriteMode
60 unswappedClientMsgs <- getAllMessages clientRecIn
62 let recRootDir = rootDir unswappedClientMsgs
64 clientMsgs <- swapFiles recRootDir curRootDir unswappedClientMsgs
69 tmpDir <- getTemporaryDirectory
70 (mappedClientRecFp, mappedClientRecIn) <- openTempFile tmpDir "clientRecInMapped"
71 mapM_ (B.hPut mappedClientRecIn . addHeader) clientMsgs
72 hSeek mappedClientRecIn AbsoluteSeek 0
74 expectedMsgs <- swapFiles recRootDir curRootDir =<< getAllMessages serverRecIn
77 forkIO $ runReaderT (listenServer expectedMsgs serverOut semas) didPass
79 -- start client replay
81 Control.runWithHandles mappedClientRecIn
83 (const $ Right (), const $ return Nothing)
84 (handlers serverIn semas)
89 -- todo: we shouldn't do this, we should check all notifications were delivered first
92 result <- takeMVar didPass
93 terminateProcess serverProc
96 setCurrentDirectory prevDir
99 removeFile mappedClientRecFp
103 -- | The internal monad for tests that can fail or pass,
104 -- ending execution early.
105 type Session = ReaderT (MVar Bool) IO
107 failSession :: String -> Session ()
108 failSession reason = do
109 lift $ putStrLn reason
111 lift $ putMVar passVar False
113 passSession :: Session ()
116 lift $ putMVar passVar True
118 -- | Listens to the server output, makes sure it matches the record and
119 -- signals any semaphores
120 listenServer :: [B.ByteString] -> Handle -> (MVar LSP.LspIdRsp, MVar LSP.LspId) -> Session ()
121 listenServer [] _ _ = passSession
122 listenServer expectedMsgs h semas@(reqSema, rspSema) = do
123 msg <- lift $ getNextMessage h
125 newExpectedMsgs <- case decode msg of
127 Nothing -> case decode msg of
128 Just m -> notification m
129 Nothing -> case decode msg of
131 Nothing -> failSession "Malformed message" >> return expectedMsgs
133 listenServer newExpectedMsgs h semas
136 where response :: LSP.ResponseMessage Value -> Session [B.ByteString]
138 lift $ putStrLn $ "Got response for id " ++ show (res ^. LSP.id)
144 lift $ putMVar reqSema (res ^. LSP.id) -- unblock the handler waiting to send a request
148 request :: LSP.RequestMessage LSP.ServerMethod Value Value -> Session [B.ByteString]
150 lift $ putStrLn $ "Got request for id " ++ show (req ^. LSP.id) ++ " " ++ show (req ^. LSP.method)
156 lift $ putMVar rspSema (req ^. LSP.id) -- unblock the handler waiting for a response
160 notification :: LSP.NotificationMessage LSP.ServerMethod Value -> Session [B.ByteString]
162 lift $ putStrLn $ "Got notification " ++ show (n ^. LSP.method)
165 lift $ putStrLn $ show (length (filter isNotification expectedMsgs) - 1) ++ " notifications remaining"
167 if n ^. LSP.method == LSP.WindowLogMessage
168 then return expectedMsgs
171 checkOrder msg = unless (inRightOrder msg expectedMsgs) $ do
172 let (Just expected) = decode firstExpected
173 _ = expected == msg -- make expected type same as res
174 failSession ("Out of order\nExpected\n" ++ show expected ++ "\nGot\n" ++ show msg ++ "\n")
177 let new = deleteFirstJson msg expectedMsgs
178 in if new == expectedMsgs
179 then failSession ("Unexpected message: " ++ show msg) >> return new
182 deleteFirstJson _ [] = []
183 deleteFirstJson msg (x:xs)
184 | Just msg == decode x = xs
185 | otherwise = x:deleteFirstJson msg xs
187 firstExpected = head $ filter (not . isNotification) expectedMsgs
191 isNotification :: B.ByteString -> Bool
193 isJust (decode msg :: Maybe (LSP.NotificationMessage Value Value))
195 -- TODO: QuickCheck tests?
196 -- | Checks wether or not the message appears in the right order
197 -- @ N1 N2 N3 REQ1 N4 N5 REQ2 RES1 @
198 -- given N2, notification order doesn't matter.
199 -- @ N1 N3 REQ1 N4 N5 REQ2 RES1 @
201 -- @ N1 N3 N4 N5 REQ2 RES1 @
203 -- @ N1 N3 N4 N5 XXXX RES1 @ False!
204 -- Order of requests and responses matter
205 inRightOrder :: (FromJSON a, Eq a) => a -> [B.ByteString] -> Bool
207 inRightOrder _ [] = error "Why is this empty"
208 -- inRightOrder (LSP.NotificationMessage _ _ _) _ = True
210 inRightOrder received (expected:msgs)
211 | Just received == decode expected = True
212 | isNotification expected = inRightOrder received msgs
216 handlers :: Handle -> (MVar LSP.LspIdRsp, MVar LSP.LspId) -> Handlers
217 handlers serverH (reqSema, rspSema) = def
220 hoverHandler = Just request
221 , completionHandler = Just request
222 , completionResolveHandler = Just request
223 , signatureHelpHandler = Just request
224 , definitionHandler = Just request
225 , referencesHandler = Just request
226 , documentHighlightHandler = Just request
227 , documentSymbolHandler = Just request
228 , workspaceSymbolHandler = Just request
229 , codeActionHandler = Just request
230 , codeLensHandler = Just request
231 , codeLensResolveHandler = Just request
232 , documentFormattingHandler = Just request
233 , documentRangeFormattingHandler = Just request
234 , documentTypeFormattingHandler = Just request
235 , renameHandler = Just request
236 , documentLinkHandler = Just request
237 , documentLinkResolveHandler = Just request
238 , executeCommandHandler = Just request
239 , initializeRequestHandler = Just request
241 , didChangeConfigurationParamsHandler = Just notification
242 , didOpenTextDocumentNotificationHandler = Just notification
243 , didChangeTextDocumentNotificationHandler = Just notification
244 , didCloseTextDocumentNotificationHandler = Just notification
245 , didSaveTextDocumentNotificationHandler = Just notification
246 , didChangeWatchedFilesNotificationHandler = Just notification
247 , initializedHandler = Just notification
248 , willSaveTextDocumentNotificationHandler = Just notification
249 , cancelNotificationHandler = Just notification
250 , exitNotificationHandler = Just notification
252 , responseHandler = Just response
256 -- TODO: May need to prevent premature exit notification being sent
257 notification msg@(LSP.NotificationMessage _ LSP.Exit _) = do
258 putStrLn "Will send exit notification soon"
260 B.hPut serverH $ addHeader (encode msg)
261 notification msg@(LSP.NotificationMessage _ m _) = do
262 B.hPut serverH $ addHeader (encode msg)
264 putStrLn $ "Sent a notification " ++ show m
266 request msg@(LSP.RequestMessage _ id m _) = do
268 when (m == LSP.TextDocumentDocumentSymbol) $ threadDelay 5000000
270 B.hPut serverH $ addHeader (encode msg)
271 putStrLn $ "Sent a request id " ++ show id ++ ": " ++ show m ++ "\nWaiting for a response"
273 rspId <- takeMVar reqSema
274 when (LSP.responseId id /= rspId)
281 response msg@(LSP.ResponseMessage _ id _ _) = do
282 putStrLn $ "Waiting for request id " ++ show id ++ " from the server"
283 reqId <- takeMVar rspSema
284 if LSP.responseId reqId /= id
285 then error $ "Expected id " ++ show reqId ++ ", got " ++ show reqId
287 B.hPut serverH $ addHeader (encode msg)
288 putStrLn $ "Sent response to request id " ++ show id