{-# 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
-import Data.Default
-import Language.Haskell.LSP.Control as Control
+import Control.Monad.Trans.Class
+import Control.Monad.Trans.Reader
import qualified Data.ByteString.Lazy.Char8 as B
-import Language.Haskell.LSP.Core
+import Data.List
+import Language.Haskell.LSP.Capture
+import Language.Haskell.LSP.Messages
import qualified Language.Haskell.LSP.Types as LSP
import Data.Aeson
+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
+ -- 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 serverOut NoBuffering
-- whether to send the next request
- semaphore <- newEmptyMVar
+ reqSema <- newEmptyMVar :: IO (MVar LSP.LspIdRsp)
+ -- whether to send the next response
+ rspSema <- newEmptyMVar :: IO (MVar LSP.LspId)
+ let semas = (reqSema, rspSema)
+
+ didPass <- newEmptyMVar
+
+ entries <- B.lines <$> B.readFile sessionFp
+
+ -- decode session
+ let unswappedEvents = map (fromJust . decode) entries
+
+ events <- swapFiles curRootDir unswappedEvents
- -- the recorded client input to the server
- clientRecIn <- openFile cfp ReadMode
- serverRecIn <- openFile sfp ReadMode
- null <- openFile "/dev/null" WriteMode
+ let clientEvents =
+ map (\(FromClient _ msg) -> msg) $ filter isClientMsg events
+ serverEvents =
+ map (\(FromServer _ msg) -> msg) $ filter isServerMsg events
+ requestMap = getRequestMap clientEvents
-- listen to server
- forkIO $ forever $ do
- msg <- getNextMessage serverOut
- expectedMsg <- getNextMessage serverRecIn
- putStrLn $ "received: " ++ (show msg)
- putStrLn $ "next expected: " ++ (show expectedMsg)
- case decode msg :: Maybe (LSP.RequestMessage Value Value Value) of
- Just _ -> putStrLn "ignoring request" >> return ()
- Nothing -> when (msg /= expectedMsg) $ error ("Expected " ++ show expectedMsg ++ " but got " ++ show msg)
- case decode msg :: Maybe (LSP.ResponseMessage Value) of
- Just _ -> putMVar semaphore ()
- Nothing -> return () -- might be a notification or something, that's ok
-
- -- send inialize request ourselves since haskell-lsp consumes it
- -- rest are handled via `handlers`
- sendInitialize clientRecIn serverIn
-
- Control.runWithHandles clientRecIn
- null
- (const $ Right (), const $ return Nothing)
- (handlers serverIn semaphore)
- def
- Nothing
- Nothing
+ forkIO $ runReaderT (listenServer serverEvents serverOut requestMap semas)
+ didPass
+
+ forM_ clientEvents (processClient serverIn rspSema reqSema)
+
+ result <- takeMVar didPass
+ terminateProcess serverProc
+
+ -- restore directory
+ setCurrentDirectory prevDir
+
+ return result
where
- sendInitialize recH serverH = do
- message <- getNextMessage recH
- B.hPut serverH (addHeader message)
- -- bring the file back to the start for haskell-lsp
- hSeek recH AbsoluteSeek 0
-
--- | 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 () -> Handlers
-handlers serverH flag = 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
- , responseHandler = Just notification
- }
+ isClientMsg (FromClient _ _) = True
+ isClientMsg _ = False
+
+ isServerMsg (FromServer _ _) = True
+ isServerMsg _ = False
+
+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
+ RspApplyWorkspaceEdit m -> response m
+ RspFromClient m -> response m
+ NotInitialized m -> notification m
+ NotExit m -> notification m
+ NotCancelRequestFromClient m -> notification m
+ NotDidChangeConfiguration m -> notification m
+ NotDidOpenTextDocument m -> notification m
+ NotDidChangeTextDocument m -> notification m
+ NotDidCloseTextDocument m -> notification m
+ NotWillSaveTextDocument m -> notification m
+ NotDidSaveTextDocument m -> notification m
+ NotDidChangeWatchedFiles m -> notification m
+ UnknownFromClientMessage m ->
+ error $ "Unknown message was recorded from the client" ++ show m
where
- notification m = do
- B.hPut serverH $ addHeader (encode m)
- putStrLn "sent a notification"
- request m = do
- B.hPut serverH $ addHeader (encode m)
- putStrLn "sent a request, waiting for a response"
- takeMVar flag
- putStrLn "got a response"
-
-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
+ -- 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"
+
+ rspId <- takeMVar reqSema
+ 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"
+ reqId <- takeMVar rspSema
+ if LSP.responseId reqId /= id
+ then error $ "Expected id " ++ show reqId ++ ", got " ++ show reqId
+ else do
+ B.hPut serverH $ addHeader (encode msg)
+ putStrLn $ "Sent response to request id " ++ show id
+
+-- | 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
+ -> RequestMap
+ -> (MVar LSP.LspIdRsp, MVar LSP.LspId)
+ -> Session ()
+listenServer [] _ _ _ = passSession
+listenServer expectedMsgs h reqMap semas@(reqSema, rspSema) = do
+ msgBytes <- lift $ getNextMessage h
+
+ let actualMsg = decodeFromServerMsg reqMap msgBytes
+
+ lift $ print actualMsg
+
+ newExpectedMsgs <- case actualMsg of
+ ReqRegisterCapability m -> request actualMsg m
+ ReqApplyWorkspaceEdit m -> request actualMsg m
+ ReqShowMessage m -> request actualMsg m
+ ReqUnregisterCapability m -> request actualMsg m
+ RspInitialize m -> response actualMsg m
+ RspShutdown m -> response actualMsg m
+ RspHover m -> response actualMsg m
+ RspCompletion m -> response actualMsg m
+ RspCompletionItemResolve m -> response actualMsg m
+ RspSignatureHelp m -> response actualMsg m
+ RspDefinition m -> response actualMsg m
+ RspFindReferences m -> response actualMsg m
+ RspDocumentHighlights m -> response actualMsg m
+ RspDocumentSymbols m -> response actualMsg m
+ RspWorkspaceSymbols m -> response actualMsg m
+ RspCodeAction m -> response actualMsg m
+ RspCodeLens m -> response actualMsg m
+ RspCodeLensResolve m -> response actualMsg m
+ RspDocumentFormatting m -> response actualMsg m
+ RspDocumentRangeFormatting m -> response actualMsg m
+ RspDocumentOnTypeFormatting m -> response actualMsg m
+ RspRename m -> response actualMsg m
+ RspExecuteCommand m -> response actualMsg m
+ RspError m -> response actualMsg m
+ RspDocumentLink m -> response actualMsg m
+ RspDocumentLinkResolve m -> response actualMsg m
+ RspWillSaveWaitUntil m -> response actualMsg m
+ NotPublishDiagnostics m -> notification actualMsg m
+ NotLogMessage m -> notification actualMsg m
+ NotShowMessage m -> notification actualMsg m
+ NotTelemetry m -> notification actualMsg m
+ NotCancelRequestFromServer m -> notification actualMsg m
+
+ listenServer newExpectedMsgs h reqMap semas
+ where
+ response
+ :: Show a
+ => FromServerMessage
+ -> LSP.ResponseMessage a
+ -> Session [FromServerMessage]
+ response msg res = do
+ lift $ putStrLn $ "Got response for id " ++ show (res ^. LSP.id)
+
+ lift $ print res
+
+ checkOrder msg
+
+ lift $ putMVar reqSema (res ^. LSP.id) -- unblock the handler waiting to send a request
+
+ markReceived msg
+
+ request
+ :: (Show a, Show b)
+ => FromServerMessage
+ -> LSP.RequestMessage LSP.ServerMethod a b
+ -> Session [FromServerMessage]
+ request msg req = do
+ lift
+ $ putStrLn
+ $ "Got request for id "
+ ++ show (req ^. LSP.id)
+ ++ " "
+ ++ show (req ^. LSP.method)
+
+ lift $ print req
+
+ checkOrder msg
+
+ lift $ putMVar rspSema (req ^. LSP.id) -- unblock the handler waiting for a response
+
+ markReceived msg
+
+ notification
+ :: Show a
+ => FromServerMessage
+ -> LSP.NotificationMessage LSP.ServerMethod a
+ -> Session [FromServerMessage]
+ notification msg 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 msg
+
+ checkOrder msg = unless (inRightOrder msg expectedMsgs) $ failSession
+ ( "Out of order\nExpected\n"
+ ++ show firstExpected
+ ++ "\nGot\n"
+ ++ show msg
+ ++ "\n"
+ )
+
+ markReceived :: FromServerMessage -> Session [FromServerMessage]
+ markReceived msg =
+ 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 :: FromServerMessage -> [FromServerMessage] -> Bool
+
+inRightOrder _ [] = error "Why is this empty"
+-- inRightOrder (LSP.NotificationMessage _ _ _) _ = True
+
+inRightOrder received (expected : msgs)
+ | received == expected = True
+ | isNotification expected = inRightOrder received msgs
+ | otherwise = False
projects / lsp-test.git / blobdiff