{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE ExistentialQuantification #-}
--- |
--- Module : Language.Haskell.LSP.Test
--- Description : A functional testing framework for LSP servers.
--- Maintainer : luke_lau@icloud.com
--- Stability : experimental
---
--- A framework for testing <https://github.com/Microsoft/language-server-protocol Language Server Protocol servers> at the JSON level.
-
+{-|
+Module : Language.Haskell.LSP.Test
+Description : A functional testing framework for LSP servers.
+Maintainer : luke_lau@icloud.com
+Stability : experimental
+Portability : POSIX
+
+Provides the framework to start functionally testing
+<https://github.com/Microsoft/language-server-protocol Language Server Protocol servers>.
+You should import "Language.Haskell.LSP.Types" alongside this.
+-}
module Language.Haskell.LSP.Test
(
-- * Sessions
- runSession
- , runSessionWithHandles
+ Session
+ , runSession
+ -- ** Config
, runSessionWithConfig
- , Session
, SessionConfig(..)
- , SessionException(..)
- , anySessionException
+ , defaultConfig
+ , C.fullCaps
+ -- ** Exceptions
+ , module Language.Haskell.LSP.Test.Exceptions
, withTimeout
-- * Sending
+ , request
+ , request_
, sendRequest
- , sendRequest_
- , sendRequest'
, sendNotification
- , sendRequestMessage
- , sendNotification'
, sendResponse
-- * Receving
- , message
- , anyRequest
- , anyResponse
- , anyNotification
- , anyMessage
- , loggingNotification
- , publishDiagnosticsNotification
- -- * Combinators
- , satisfy
+ , module Language.Haskell.LSP.Test.Parsing
-- * Utilities
+ -- | Quick helper functions for common tasks.
+ -- ** Initialization
, initializeResponse
-- ** Documents
, openDoc
+ , openDoc'
+ , closeDoc
+ , changeDoc
, documentContents
, getDocumentEdit
, getDocUri
, getDocumentSymbols
-- ** Diagnostics
, waitForDiagnostics
+ , waitForDiagnosticsSource
, noDiagnostics
+ , getCurrentDiagnostics
-- ** Commands
, executeCommand
-- ** Code Actions
+ , getCodeActions
, getAllCodeActions
, executeCodeAction
-- ** Completions
, getCompletions
+ -- ** References
+ , getReferences
+ -- ** Definitions
+ , getDefinitions
+ , getTypeDefinitions
+ -- ** Renaming
+ , rename
+ -- ** Hover
+ , getHover
+ -- ** Highlights
+ , getHighlights
+ -- ** Formatting
+ , formatDoc
+ , formatRange
-- ** Edits
, applyEdit
) where
import Data.Aeson
import Data.Default
import qualified Data.HashMap.Strict as HashMap
+import Data.IORef
import qualified Data.Map as Map
import Data.Maybe
-import Language.Haskell.LSP.Types hiding (id, capabilities, message)
-import qualified Language.Haskell.LSP.Types as LSP
-import qualified Language.Haskell.LSP.Types.Capabilities as LSP
+import Language.Haskell.LSP.Types
+import Language.Haskell.LSP.Types.Lens hiding
+ (id, capabilities, message, executeCommand, applyEdit, rename)
+import qualified Language.Haskell.LSP.Types.Lens as LSP
+import qualified Language.Haskell.LSP.Types.Capabilities as C
import Language.Haskell.LSP.Messages
import Language.Haskell.LSP.VFS
import Language.Haskell.LSP.Test.Compat
import System.IO
import System.Directory
import System.FilePath
-import qualified Yi.Rope as Rope
+import qualified Data.Rope.UTF16 as Rope
-- | Starts a new session.
+--
+-- > runSession "hie" fullCaps "path/to/root/dir" $ do
+-- > doc <- openDoc "Desktop/simple.hs" "haskell"
+-- > diags <- waitForDiagnostics
+-- > let pos = Position 12 5
+-- > params = TextDocumentPositionParams doc
+-- > hover <- request TextDocumentHover params
runSession :: String -- ^ The command to run the server.
+ -> C.ClientCapabilities -- ^ The capabilities that the client should declare.
-> FilePath -- ^ The filepath to the root directory for the session.
-> Session a -- ^ The session to run.
-> IO a
runSession = runSessionWithConfig def
--- | Starts a new sesion with a client with the specified capabilities.
-runSessionWithConfig :: SessionConfig -- ^ The capabilities the client should have.
+-- | Starts a new sesion with a custom configuration.
+runSessionWithConfig :: SessionConfig -- ^ Configuration options for the session.
-> String -- ^ The command to run the server.
+ -> C.ClientCapabilities -- ^ The capabilities that the client should declare.
-> FilePath -- ^ The filepath to the root directory for the session.
-> Session a -- ^ The session to run.
-> IO a
-runSessionWithConfig config serverExe rootDir session = do
+runSessionWithConfig config serverExe caps rootDir session = do
+ -- We use this IORef to make exception non-fatal when the server is supposed to shutdown.
+ exitOk <- newIORef False
pid <- getCurrentProcessID
absRootDir <- canonicalizePath rootDir
(Just $ T.pack absRootDir)
(Just $ filePathToUri absRootDir)
Nothing
- (capabilities config)
+ caps
(Just TraceOff)
+ Nothing
withServer serverExe (logStdErr config) $ \serverIn serverOut _ ->
- runSessionWithHandles serverIn serverOut listenServer config rootDir $ do
+ runSessionWithHandles serverIn serverOut (\h c -> catchWhenTrue exitOk $ listenServer h c) config caps rootDir $ do
-- Wrap the session around initialize and shutdown calls
- initRspMsg <- sendRequest Initialize initializeParams :: Session InitializeResponse
+ initRspMsg <- request Initialize initializeParams :: Session InitializeResponse
liftIO $ maybe (return ()) (putStrLn . ("Error while initializing: " ++) . show ) (initRspMsg ^. LSP.error)
sendNotification Initialized InitializedParams
+ case lspConfig config of
+ Just cfg -> sendNotification WorkspaceDidChangeConfiguration (DidChangeConfigurationParams cfg)
+ Nothing -> return ()
+
-- Run the actual test
result <- session
+ liftIO $ atomicWriteIORef exitOk True
sendNotification Exit ExitParams
return result
where
+ catchWhenTrue :: IORef Bool -> IO () -> IO ()
+ catchWhenTrue exitOk a =
+ a `catch` (\e -> do
+ x <- readIORef exitOk
+ unless x $ throw (e :: SomeException))
+
-- | Listens to the server output, makes sure it matches the record and
-- signals any semaphores
+ -- Note that on Windows, we cannot kill a thread stuck in getNextMessage.
+ -- So we have to wait for the exit notification to kill the process first
+ -- and then getNextMessage will fail.
listenServer :: Handle -> SessionContext -> IO ()
listenServer serverOut context = do
msgBytes <- getNextMessage serverOut
documentContents :: TextDocumentIdentifier -> Session T.Text
documentContents doc = do
vfs <- vfs <$> get
- liftIO $ print vfs
- liftIO $ print doc
let file = vfs Map.! (doc ^. uri)
return $ Rope.toText $ Language.Haskell.LSP.VFS._text file
in maybe False (HashMap.member (doc ^. uri)) mMap
-- | Sends a request to the server and waits for its response.
+-- Will skip any messages in between the request and the response
-- @
--- rsp <- sendRequest TextDocumentDocumentSymbol params :: Session DocumentSymbolsResponse
+-- rsp <- request TextDocumentDocumentSymbol params :: Session DocumentSymbolsResponse
-- @
-- Note: will skip any messages in between the request and the response.
-sendRequest :: (ToJSON params, FromJSON a) => ClientMethod -> params -> Session (ResponseMessage a)
-sendRequest m = sendRequest' m >=> skipManyTill anyMessage . responseForId
+request :: (ToJSON params, FromJSON a) => ClientMethod -> params -> Session (ResponseMessage a)
+request m = sendRequest m >=> skipManyTill anyMessage . responseForId
--- | Send a request to the server and wait for its response,
--- but discard it.
-sendRequest_ :: ToJSON params => ClientMethod -> params -> Session ()
-sendRequest_ p = void . (sendRequest p :: ToJSON params => params -> Session (ResponseMessage Value))
+-- | The same as 'sendRequest', but discard the response.
+request_ :: ToJSON params => ClientMethod -> params -> Session ()
+request_ p = void . (request p :: ToJSON params => params -> Session (ResponseMessage Value))
--- | Sends a request to the server without waiting on the response.
-sendRequest'
+-- | Sends a request to the server. Unlike 'request', this doesn't wait for the response.
+sendRequest
:: ToJSON params
=> ClientMethod -- ^ The request method.
-> params -- ^ The request parameters.
-> Session LspId -- ^ The id of the request that was sent.
-sendRequest' method params = do
+sendRequest method params = do
id <- curReqId <$> get
modify $ \c -> c { curReqId = nextId id }
object ["jsonrpc" .= rpc, "id" .= id, "method" .= method, "params" .= params]
-sendRequestMessage :: (ToJSON a, ToJSON b) => RequestMessage ClientMethod a b -> Session ()
-sendRequestMessage req = do
- -- Update the request map
- reqMap <- requestMap <$> ask
- liftIO $ modifyMVar_ reqMap $
- \r -> return $ updateRequestMap r (req ^. LSP.id) (req ^. method)
-
- sendMessage req
-
-- | Sends a notification to the server.
sendNotification :: ToJSON a
=> ClientMethod -- ^ The notification method.
-> a -- ^ The notification parameters.
-> Session ()
--- | Open a virtual file if we send a did open text document notification
+-- Open a virtual file if we send a did open text document notification
sendNotification TextDocumentDidOpen params = do
let params' = fromJust $ decode $ encode params
n :: DidOpenTextDocumentNotification
oldVFS <- vfs <$> get
newVFS <- liftIO $ openVFS oldVFS n
modify (\s -> s { vfs = newVFS })
- sendNotification' n
+ sendMessage n
--- | Close a virtual file if we send a close text document notification
+-- Close a virtual file if we send a close text document notification
sendNotification TextDocumentDidClose params = do
let params' = fromJust $ decode $ encode params
n :: DidCloseTextDocumentNotification
oldVFS <- vfs <$> get
newVFS <- liftIO $ closeVFS oldVFS n
modify (\s -> s { vfs = newVFS })
- sendNotification' n
+ sendMessage n
-sendNotification method params = sendNotification' (NotificationMessage "2.0" method params)
+sendNotification TextDocumentDidChange params = do
+ let params' = fromJust $ decode $ encode params
+ n :: DidChangeTextDocumentNotification
+ n = NotificationMessage "2.0" TextDocumentDidChange params'
+ oldVFS <- vfs <$> get
+ newVFS <- liftIO $ changeFromClientVFS oldVFS n
+ modify (\s -> s { vfs = newVFS })
+ sendMessage n
-sendNotification' :: (ToJSON a, ToJSON b) => NotificationMessage a b -> Session ()
-sendNotification' = sendMessage
+sendNotification method params = sendMessage (NotificationMessage "2.0" method params)
+-- | Sends a response to the server.
sendResponse :: ToJSON a => ResponseMessage a -> Session ()
sendResponse = sendMessage
-- | Opens a text document and sends a notification to the client.
openDoc :: FilePath -> String -> Session TextDocumentIdentifier
openDoc file languageId = do
- item <- getDocItem file languageId
- sendNotification TextDocumentDidOpen (DidOpenTextDocumentParams item)
- TextDocumentIdentifier <$> getDocUri file
- where
- -- | Reads in a text document as the first version.
- getDocItem :: FilePath -- ^ The path to the text document to read in.
- -> String -- ^ The language ID, e.g "haskell" for .hs files.
- -> Session TextDocumentItem
- getDocItem file languageId = do
context <- ask
let fp = rootDir context </> file
contents <- liftIO $ T.readFile fp
- return $ TextDocumentItem (filePathToUri fp) (T.pack languageId) 0 contents
+ openDoc' file languageId contents
+
+-- | This is a variant of `openDoc` that takes the file content as an argument.
+openDoc' :: FilePath -> String -> T.Text -> Session TextDocumentIdentifier
+openDoc' file languageId contents = do
+ context <- ask
+ let fp = rootDir context </> file
+ uri = filePathToUri fp
+ item = TextDocumentItem uri (T.pack languageId) 0 contents
+ sendNotification TextDocumentDidOpen (DidOpenTextDocumentParams item)
+ pure $ TextDocumentIdentifier uri
+
+-- | Closes a text document and sends a notification to the client.
+closeDoc :: TextDocumentIdentifier -> Session ()
+closeDoc docId = do
+ let params = DidCloseTextDocumentParams (TextDocumentIdentifier (docId ^. uri))
+ sendNotification TextDocumentDidClose params
+
+-- | Changes a text document and sends a notification to the client
+changeDoc :: TextDocumentIdentifier -> [TextDocumentContentChangeEvent] -> Session ()
+changeDoc docId changes = do
+ verDoc <- getVersionedDoc docId
+ let params = DidChangeTextDocumentParams (verDoc & version . non 0 +~ 1) (List changes)
+ sendNotification TextDocumentDidChange params
-- | Gets the Uri for the file corrected to the session directory.
getDocUri :: FilePath -> Session Uri
let (List diags) = diagsNot ^. params . LSP.diagnostics
return diags
+-- | The same as 'waitForDiagnostics', but will only match a specific
+-- 'Language.Haskell.LSP.Types._source'.
+waitForDiagnosticsSource :: String -> Session [Diagnostic]
+waitForDiagnosticsSource src = do
+ diags <- waitForDiagnostics
+ let res = filter matches diags
+ if null res
+ then waitForDiagnosticsSource src
+ else return res
+ where
+ matches :: Diagnostic -> Bool
+ matches d = d ^. source == Just (T.pack src)
+
-- | Expects a 'PublishDiagnosticsNotification' and throws an
--- 'UnexpectedDiagnosticsException' if there are any diagnostics
+-- 'UnexpectedDiagnostics' exception if there are any diagnostics
-- returned.
noDiagnostics :: Session ()
noDiagnostics = do
when (diagsNot ^. params . LSP.diagnostics /= List []) $ liftIO $ throw UnexpectedDiagnostics
-- | Returns the symbols in a document.
-getDocumentSymbols :: TextDocumentIdentifier -> Session [SymbolInformation]
+getDocumentSymbols :: TextDocumentIdentifier -> Session (Either [DocumentSymbol] [SymbolInformation])
getDocumentSymbols doc = do
- ResponseMessage _ rspLid mRes mErr <- sendRequest TextDocumentDocumentSymbol (DocumentSymbolParams doc)
+ ResponseMessage _ rspLid mRes mErr <- request TextDocumentDocumentSymbol (DocumentSymbolParams doc) :: Session DocumentSymbolsResponse
maybe (return ()) (throw . UnexpectedResponseError rspLid) mErr
- let (Just (List symbols)) = mRes
- return symbols
+ case mRes of
+ Just (DSDocumentSymbols (List xs)) -> return (Left xs)
+ Just (DSSymbolInformation (List xs)) -> return (Right xs)
+ Nothing -> Prelude.error "No result and no error in DocumentSymbolsResponse"
+
+-- | Returns the code actions in the specified range.
+getCodeActions :: TextDocumentIdentifier -> Range -> Session [CAResult]
+getCodeActions doc range = do
+ ctx <- getCodeActionContext doc
+ rsp <- request TextDocumentCodeAction (CodeActionParams doc range ctx)
+
+ case rsp ^. result of
+ Just (List xs) -> return xs
+ _ -> throw (UnexpectedResponseError (rsp ^. LSP.id) (fromJust $ rsp ^. LSP.error))
-- | Returns all the code actions in a document by
-- querying the code actions at each of the current
-- diagnostics' positions.
-getAllCodeActions :: TextDocumentIdentifier -> Session [CommandOrCodeAction]
+getAllCodeActions :: TextDocumentIdentifier -> Session [CAResult]
getAllCodeActions doc = do
- curDiags <- fromMaybe [] . Map.lookup (doc ^. uri) . curDiagnostics <$> get
- let ctx = CodeActionContext (List curDiags) Nothing
+ ctx <- getCodeActionContext doc
- foldM (go ctx) [] curDiags
+ foldM (go ctx) [] =<< getCurrentDiagnostics doc
where
- go :: CodeActionContext -> [CommandOrCodeAction] -> Diagnostic -> Session [CommandOrCodeAction]
+ go :: CodeActionContext -> [CAResult] -> Diagnostic -> Session [CAResult]
go ctx acc diag = do
- ResponseMessage _ rspLid mRes mErr <- sendRequest TextDocumentCodeAction (CodeActionParams doc (diag ^. range) ctx)
+ ResponseMessage _ rspLid mRes mErr <- request TextDocumentCodeAction (CodeActionParams doc (diag ^. range) ctx)
case mErr of
Just e -> throw (UnexpectedResponseError rspLid e)
let Just (List cmdOrCAs) = mRes
in return (acc ++ cmdOrCAs)
+getCodeActionContext :: TextDocumentIdentifier -> Session CodeActionContext
+getCodeActionContext doc = do
+ curDiags <- getCurrentDiagnostics doc
+ return $ CodeActionContext (List curDiags) Nothing
+
+-- | Returns the current diagnostics that have been sent to the client.
+-- Note that this does not wait for more to come in.
+getCurrentDiagnostics :: TextDocumentIdentifier -> Session [Diagnostic]
+getCurrentDiagnostics doc = fromMaybe [] . Map.lookup (doc ^. uri) . curDiagnostics <$> get
+
-- | Executes a command.
executeCommand :: Command -> Session ()
executeCommand cmd = do
let args = decode $ encode $ fromJust $ cmd ^. arguments
execParams = ExecuteCommandParams (cmd ^. command) args
- sendRequest_ WorkspaceExecuteCommand execParams
+ request_ WorkspaceExecuteCommand execParams
-- | Executes a code action.
-- Matching with the specification, if a code action
fs <- vfs <$> get
let ver =
case fs Map.!? uri of
- Just (VirtualFile v _) -> Just v
+ Just (VirtualFile v _ _) -> Just v
_ -> Nothing
return (VersionedTextDocumentIdentifier uri ver)
verDoc <- getVersionedDoc doc
- caps <- asks (capabilities . config)
+ caps <- asks sessionCapabilities
let supportsDocChanges = fromMaybe False $ do
- let LSP.ClientCapabilities mWorkspace _ _ = caps
- LSP.WorkspaceClientCapabilities _ mEdit _ _ _ _ <- mWorkspace
- LSP.WorkspaceEditClientCapabilities mDocChanges <- mEdit
+ let mWorkspace = C._workspace caps
+ C.WorkspaceClientCapabilities _ mEdit _ _ _ _ _ _ <- mWorkspace
+ C.WorkspaceEditClientCapabilities mDocChanges <- mEdit
mDocChanges
let wEdit = if supportsDocChanges
-- | Returns the completions for the position in the document.
getCompletions :: TextDocumentIdentifier -> Position -> Session [CompletionItem]
getCompletions doc pos = do
- rsp <- sendRequest TextDocumentCompletion (TextDocumentPositionParams doc pos)
+ rsp <- request TextDocumentCompletion (TextDocumentPositionParams doc pos)
- let exc = throw $ UnexpectedResponseError (rsp ^. LSP.id)
- (fromJust $ rsp ^. LSP.error)
- res = fromMaybe exc (rsp ^. result)
- case res of
+ case getResponseResult rsp of
Completions (List items) -> return items
CompletionList (CompletionListType _ (List items)) -> return items
+
+-- | Returns the references for the position in the document.
+getReferences :: TextDocumentIdentifier -- ^ The document to lookup in.
+ -> Position -- ^ The position to lookup.
+ -> Bool -- ^ Whether to include declarations as references.
+ -> Session [Location] -- ^ The locations of the references.
+getReferences doc pos inclDecl =
+ let ctx = ReferenceContext inclDecl
+ params = ReferenceParams doc pos ctx
+ in getResponseResult <$> request TextDocumentReferences params
+
+-- | Returns the definition(s) for the term at the specified position.
+getDefinitions :: TextDocumentIdentifier -- ^ The document the term is in.
+ -> Position -- ^ The position the term is at.
+ -> Session [Location] -- ^ The location(s) of the definitions
+getDefinitions doc pos =
+ let params = TextDocumentPositionParams doc pos
+ in getResponseResult <$> request TextDocumentDefinition params
+
+-- | Returns the type definition(s) for the term at the specified position.
+getTypeDefinitions :: TextDocumentIdentifier -- ^ The document the term is in.
+ -> Position -- ^ The position the term is at.
+ -> Session [Location] -- ^ The location(s) of the definitions
+getTypeDefinitions doc pos =
+ let params = TextDocumentPositionParams doc pos
+ in getResponseResult <$> request TextDocumentTypeDefinition params
+
+-- | Renames the term at the specified position.
+rename :: TextDocumentIdentifier -> Position -> String -> Session ()
+rename doc pos newName = do
+ let params = RenameParams doc pos (T.pack newName)
+ rsp <- request TextDocumentRename params :: Session RenameResponse
+ let wEdit = getResponseResult rsp
+ req = RequestMessage "" (IdInt 0) WorkspaceApplyEdit (ApplyWorkspaceEditParams wEdit)
+ updateState (ReqApplyWorkspaceEdit req)
+
+-- | Returns the hover information at the specified position.
+getHover :: TextDocumentIdentifier -> Position -> Session (Maybe Hover)
+getHover doc pos =
+ let params = TextDocumentPositionParams doc pos
+ in getResponseResult <$> request TextDocumentHover params
+
+-- | Returns the highlighted occurences of the term at the specified position
+getHighlights :: TextDocumentIdentifier -> Position -> Session [DocumentHighlight]
+getHighlights doc pos =
+ let params = TextDocumentPositionParams doc pos
+ in getResponseResult <$> request TextDocumentDocumentHighlight params
+
+-- | Checks the response for errors and throws an exception if needed.
+-- Returns the result if successful.
+getResponseResult :: ResponseMessage a -> a
+getResponseResult rsp = fromMaybe exc (rsp ^. result)
+ where exc = throw $ UnexpectedResponseError (rsp ^. LSP.id)
+ (fromJust $ rsp ^. LSP.error)
+
+-- | Applies formatting to the specified document.
+formatDoc :: TextDocumentIdentifier -> FormattingOptions -> Session ()
+formatDoc doc opts = do
+ let params = DocumentFormattingParams doc opts
+ edits <- getResponseResult <$> request TextDocumentFormatting params
+ applyTextEdits doc edits
+
+-- | Applies formatting to the specified range in a document.
+formatRange :: TextDocumentIdentifier -> FormattingOptions -> Range -> Session ()
+formatRange doc opts range = do
+ let params = DocumentRangeFormattingParams doc range opts
+ edits <- getResponseResult <$> request TextDocumentRangeFormatting params
+ applyTextEdits doc edits
+
+applyTextEdits :: TextDocumentIdentifier -> List TextEdit -> Session ()
+applyTextEdits doc edits =
+ let wEdit = WorkspaceEdit (Just (HashMap.singleton (doc ^. uri) edits)) Nothing
+ req = RequestMessage "" (IdInt 0) WorkspaceApplyEdit (ApplyWorkspaceEditParams wEdit)
+ in updateState (ReqApplyWorkspaceEdit req)