ghcide-0.2.0: test/exe/Main.hs
-- Copyright (c) 2019 The DAML Authors. All rights reserved.
-- SPDX-License-Identifier: Apache-2.0
{-# LANGUAGE AllowAmbiguousTypes #-}
{-# LANGUAGE DuplicateRecordFields #-}
{-# LANGUAGE PatternSynonyms #-}
{-# LANGUAGE CPP #-}
#include "ghc-api-version.h"
module Main (main) where
import Control.Applicative.Combinators
import Control.Exception (bracket, catch)
import qualified Control.Lens as Lens
import Control.Monad
import Control.Monad.IO.Class (liftIO)
import Data.Aeson (FromJSON, Value)
import Data.Foldable
import Data.List.Extra
import Data.Rope.UTF16 (Rope)
import qualified Data.Rope.UTF16 as Rope
import Development.IDE.Core.PositionMapping (fromCurrent, toCurrent)
import Development.IDE.GHC.Util
import qualified Data.Text as T
import Data.Typeable
import Development.IDE.Spans.Common
import Development.IDE.Test
import Development.IDE.Test.Runfiles
import Development.IDE.Types.Location
import Development.Shake (getDirectoryFilesIO)
import Language.Haskell.LSP.Test
import Language.Haskell.LSP.Messages
import Language.Haskell.LSP.Types
import Language.Haskell.LSP.Types.Capabilities
import qualified Language.Haskell.LSP.Types.Lens as Lsp (diagnostics, params, message)
import Language.Haskell.LSP.VFS (applyChange)
import Network.URI
import System.Environment.Blank (getEnv, setEnv, unsetEnv)
import System.FilePath
import System.IO.Extra
import System.Directory
import Test.QuickCheck
import Test.QuickCheck.Instances ()
import Test.Tasty
import Test.Tasty.ExpectedFailure
import Test.Tasty.Ingredients.Rerun
import Test.Tasty.HUnit
import Test.Tasty.QuickCheck
import Data.Maybe
main :: IO ()
main = do
-- We mess with env vars so run single-threaded.
setEnv "TASTY_NUM_THREADS" "1" True
defaultMainWithRerun $ testGroup "HIE"
[ testSession "open close" $ do
doc <- createDoc "Testing.hs" "haskell" ""
void (skipManyTill anyMessage message :: Session WorkDoneProgressCreateRequest)
void (skipManyTill anyMessage message :: Session WorkDoneProgressBeginNotification)
closeDoc doc
void (skipManyTill anyMessage message :: Session WorkDoneProgressEndNotification)
, initializeResponseTests
, completionTests
, cppTests
, diagnosticTests
, codeActionTests
, codeLensesTests
, outlineTests
, findDefinitionAndHoverTests
, pluginTests
, preprocessorTests
, thTests
, safeTests
, unitTests
, haddockTests
, positionMappingTests
, watchedFilesTests
, cradleTests
, dependentFileTest
]
initializeResponseTests :: TestTree
initializeResponseTests = withResource acquire release tests where
-- these tests document and monitor the evolution of the
-- capabilities announced by the server in the initialize
-- response. Currently the server advertises almost no capabilities
-- at all, in some cases failing to announce capabilities that it
-- actually does provide! Hopefully this will change ...
tests :: IO InitializeResponse -> TestTree
tests getInitializeResponse =
testGroup "initialize response capabilities"
[ chk " text doc sync" _textDocumentSync tds
, chk " hover" _hoverProvider (Just True)
, chk " completion" _completionProvider (Just $ CompletionOptions (Just False) (Just ["."]) Nothing)
, chk "NO signature help" _signatureHelpProvider Nothing
, chk " goto definition" _definitionProvider (Just True)
, chk "NO goto type definition" _typeDefinitionProvider (Just $ GotoOptionsStatic False)
, chk "NO goto implementation" _implementationProvider (Just $ GotoOptionsStatic False)
, chk "NO find references" _referencesProvider Nothing
, chk "NO doc highlight" _documentHighlightProvider Nothing
, chk " doc symbol" _documentSymbolProvider (Just True)
, chk "NO workspace symbol" _workspaceSymbolProvider Nothing
, chk " code action" _codeActionProvider $ Just $ CodeActionOptionsStatic True
, chk " code lens" _codeLensProvider $ Just $ CodeLensOptions Nothing
, chk "NO doc formatting" _documentFormattingProvider Nothing
, chk "NO doc range formatting"
_documentRangeFormattingProvider Nothing
, chk "NO doc formatting on typing"
_documentOnTypeFormattingProvider Nothing
, chk "NO renaming" _renameProvider (Just $ RenameOptionsStatic False)
, chk "NO doc link" _documentLinkProvider Nothing
, chk "NO color" _colorProvider (Just $ ColorOptionsStatic False)
, chk "NO folding range" _foldingRangeProvider (Just $ FoldingRangeOptionsStatic False)
, che " execute command" _executeCommandProvider (Just $ ExecuteCommandOptions $ List ["typesignature.add"])
, chk " workspace" _workspace (Just $ WorkspaceOptions (Just WorkspaceFolderOptions{_supported = Just True, _changeNotifications = Just ( WorkspaceFolderChangeNotificationsBool True )}))
, chk "NO experimental" _experimental Nothing
] where
tds = Just (TDSOptions (TextDocumentSyncOptions
{ _openClose = Just True
, _change = Just TdSyncIncremental
, _willSave = Nothing
, _willSaveWaitUntil = Nothing
, _save = Just (SaveOptions {_includeText = Nothing})}))
chk :: (Eq a, Show a) => TestName -> (InitializeResponseCapabilitiesInner -> a) -> a -> TestTree
chk title getActual expected =
testCase title $ getInitializeResponse >>= \ir -> expected @=? (getActual . innerCaps) ir
che :: TestName -> (InitializeResponseCapabilitiesInner -> Maybe ExecuteCommandOptions) -> Maybe ExecuteCommandOptions -> TestTree
che title getActual _expected = testCase title doTest
where
doTest = do
ir <- getInitializeResponse
let Just ExecuteCommandOptions {_commands = List [command]} = getActual $ innerCaps ir
True @=? T.isSuffixOf "typesignature.add" command
innerCaps :: InitializeResponse -> InitializeResponseCapabilitiesInner
innerCaps (ResponseMessage _ _ (Right (InitializeResponseCapabilities c))) = c
innerCaps _ = error "this test only expects inner capabilities"
acquire :: IO InitializeResponse
acquire = run initializeResponse
release :: InitializeResponse -> IO ()
release = const $ pure ()
diagnosticTests :: TestTree
diagnosticTests = testGroup "diagnostics"
[ testSessionWait "fix syntax error" $ do
let content = T.unlines [ "module Testing wher" ]
doc <- createDoc "Testing.hs" "haskell" content
expectDiagnostics [("Testing.hs", [(DsError, (0, 15), "parse error")])]
let change = TextDocumentContentChangeEvent
{ _range = Just (Range (Position 0 15) (Position 0 19))
, _rangeLength = Nothing
, _text = "where"
}
changeDoc doc [change]
expectDiagnostics [("Testing.hs", [])]
, testSessionWait "introduce syntax error" $ do
let content = T.unlines [ "module Testing where" ]
doc <- createDoc "Testing.hs" "haskell" content
void $ skipManyTill anyMessage (message :: Session WorkDoneProgressCreateRequest)
void $ skipManyTill anyMessage (message :: Session WorkDoneProgressBeginNotification)
let change = TextDocumentContentChangeEvent
{ _range = Just (Range (Position 0 15) (Position 0 18))
, _rangeLength = Nothing
, _text = "wher"
}
changeDoc doc [change]
expectDiagnostics [("Testing.hs", [(DsError, (0, 15), "parse error")])]
, testSessionWait "variable not in scope" $ do
let content = T.unlines
[ "module Testing where"
, "foo :: Int -> Int -> Int"
, "foo a b = a + ab"
, "bar :: Int -> Int -> Int"
, "bar a b = cd + b"
]
_ <- createDoc "Testing.hs" "haskell" content
expectDiagnostics
[ ( "Testing.hs"
, [ (DsError, (2, 14), "Variable not in scope: ab")
, (DsError, (4, 10), "Variable not in scope: cd")
]
)
]
, testSessionWait "type error" $ do
let content = T.unlines
[ "module Testing where"
, "foo :: Int -> String -> Int"
, "foo a b = a + b"
]
_ <- createDoc "Testing.hs" "haskell" content
expectDiagnostics
[ ( "Testing.hs"
, [(DsError, (2, 14), "Couldn't match type '[Char]' with 'Int'")]
)
]
, testSessionWait "typed hole" $ do
let content = T.unlines
[ "module Testing where"
, "foo :: Int -> String"
, "foo a = _ a"
]
_ <- createDoc "Testing.hs" "haskell" content
expectDiagnostics
[ ( "Testing.hs"
, [(DsError, (2, 8), "Found hole: _ :: Int -> String")]
)
]
, testGroup "deferral" $
let sourceA a = T.unlines
[ "module A where"
, "a :: Int"
, "a = " <> a]
sourceB = T.unlines
[ "module B where"
, "import A"
, "b :: Float"
, "b = True"]
bMessage = "Couldn't match expected type 'Float' with actual type 'Bool'"
expectedDs aMessage =
[ ("A.hs", [(DsError, (2,4), aMessage)])
, ("B.hs", [(DsError, (3,4), bMessage)])]
deferralTest title binding msg = testSessionWait title $ do
_ <- createDoc "A.hs" "haskell" $ sourceA binding
_ <- createDoc "B.hs" "haskell" sourceB
expectDiagnostics $ expectedDs msg
in
[ deferralTest "type error" "True" "Couldn't match expected type"
, deferralTest "typed hole" "_" "Found hole"
, deferralTest "out of scope var" "unbound" "Variable not in scope"
]
, testSessionWait "remove required module" $ do
let contentA = T.unlines [ "module ModuleA where" ]
docA <- createDoc "ModuleA.hs" "haskell" contentA
let contentB = T.unlines
[ "module ModuleB where"
, "import ModuleA"
]
_ <- createDoc "ModuleB.hs" "haskell" contentB
let change = TextDocumentContentChangeEvent
{ _range = Just (Range (Position 0 0) (Position 0 20))
, _rangeLength = Nothing
, _text = ""
}
changeDoc docA [change]
expectDiagnostics [("ModuleB.hs", [(DsError, (1, 0), "Could not find module")])]
, testSessionWait "add missing module" $ do
let contentB = T.unlines
[ "module ModuleB where"
, "import ModuleA"
]
_ <- createDoc "ModuleB.hs" "haskell" contentB
expectDiagnostics [("ModuleB.hs", [(DsError, (1, 7), "Could not find module")])]
let contentA = T.unlines [ "module ModuleA where" ]
_ <- createDoc "ModuleA.hs" "haskell" contentA
expectDiagnostics [("ModuleB.hs", [])]
, testSessionWait "add missing module (non workspace)" $ do
let contentB = T.unlines
[ "module ModuleB where"
, "import ModuleA"
]
_ <- createDoc "/tmp/ModuleB.hs" "haskell" contentB
expectDiagnostics [("/tmp/ModuleB.hs", [(DsError, (1, 7), "Could not find module")])]
let contentA = T.unlines [ "module ModuleA where" ]
_ <- createDoc "/tmp/ModuleA.hs" "haskell" contentA
expectDiagnostics [("/tmp/ModuleB.hs", [])]
, testSessionWait "cyclic module dependency" $ do
let contentA = T.unlines
[ "module ModuleA where"
, "import ModuleB"
]
let contentB = T.unlines
[ "module ModuleB where"
, "import ModuleA"
]
_ <- createDoc "ModuleA.hs" "haskell" contentA
_ <- createDoc "ModuleB.hs" "haskell" contentB
expectDiagnostics
[ ( "ModuleA.hs"
, [(DsError, (1, 7), "Cyclic module dependency between ModuleA, ModuleB")]
)
, ( "ModuleB.hs"
, [(DsError, (1, 7), "Cyclic module dependency between ModuleA, ModuleB")]
)
]
, testSessionWait "cyclic module dependency with hs-boot" $ do
let contentA = T.unlines
[ "module ModuleA where"
, "import {-# SOURCE #-} ModuleB"
]
let contentB = T.unlines
[ "module ModuleB where"
, "import ModuleA"
]
let contentBboot = T.unlines
[ "module ModuleB where"
]
_ <- createDoc "ModuleA.hs" "haskell" contentA
_ <- createDoc "ModuleB.hs" "haskell" contentB
_ <- createDoc "ModuleB.hs-boot" "haskell" contentBboot
expectDiagnostics []
, testSessionWait "correct reference used with hs-boot" $ do
let contentB = T.unlines
[ "module ModuleB where"
, "import {-# SOURCE #-} ModuleA"
]
let contentA = T.unlines
[ "module ModuleA where"
, "import ModuleB"
, "x = 5"
]
let contentAboot = T.unlines
[ "module ModuleA where"
]
let contentC = T.unlines
[ "module ModuleC where"
, "import ModuleA"
-- this reference will fail if it gets incorrectly
-- resolved to the hs-boot file
, "y = x"
]
_ <- createDoc "ModuleB.hs" "haskell" contentB
_ <- createDoc "ModuleA.hs" "haskell" contentA
_ <- createDoc "ModuleA.hs-boot" "haskell" contentAboot
_ <- createDoc "ModuleC.hs" "haskell" contentC
expectDiagnostics []
, testSessionWait "redundant import" $ do
let contentA = T.unlines ["module ModuleA where"]
let contentB = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import ModuleA"
]
_ <- createDoc "ModuleA.hs" "haskell" contentA
_ <- createDoc "ModuleB.hs" "haskell" contentB
expectDiagnostics
[ ( "ModuleB.hs"
, [(DsWarning, (2, 0), "The import of 'ModuleA' is redundant")]
)
]
, testSessionWait "package imports" $ do
let thisDataListContent = T.unlines
[ "module Data.List where"
, "x :: Integer"
, "x = 123"
]
let mainContent = T.unlines
[ "{-# LANGUAGE PackageImports #-}"
, "module Main where"
, "import qualified \"this\" Data.List as ThisList"
, "import qualified \"base\" Data.List as BaseList"
, "useThis = ThisList.x"
, "useBase = BaseList.map"
, "wrong1 = ThisList.map"
, "wrong2 = BaseList.x"
]
_ <- createDoc "Data/List.hs" "haskell" thisDataListContent
_ <- createDoc "Main.hs" "haskell" mainContent
expectDiagnostics
[ ( "Main.hs"
, [(DsError, (6, 9), "Not in scope: \8216ThisList.map\8217")
,(DsError, (7, 9), "Not in scope: \8216BaseList.x\8217")
]
)
]
, testSessionWait "unqualified warnings" $ do
let fooContent = T.unlines
[ "{-# OPTIONS_GHC -Wredundant-constraints #-}"
, "module Foo where"
, "foo :: Ord a => a -> Int"
, "foo a = 1"
]
_ <- createDoc "Foo.hs" "haskell" fooContent
expectDiagnostics
[ ( "Foo.hs"
-- The test is to make sure that warnings contain unqualified names
-- where appropriate. The warning should use an unqualified name 'Ord', not
-- sometihng like 'GHC.Classes.Ord'. The choice of redundant-constraints to
-- test this is fairly arbitrary.
, [(DsWarning, (2, 0), "Redundant constraint: Ord a")
]
)
]
, testSessionWait "lower-case drive" $ do
let aContent = T.unlines
[ "module A.A where"
, "import A.B ()"
]
bContent = T.unlines
[ "{-# OPTIONS_GHC -Wall #-}"
, "module A.B where"
, "import Data.List"
]
uriB <- getDocUri "A/B.hs"
Just pathB <- pure $ uriToFilePath uriB
uriB <- pure $
let (drive, suffix) = splitDrive pathB
in filePathToUri (joinDrive (lower drive) suffix)
liftIO $ createDirectoryIfMissing True (takeDirectory pathB)
liftIO $ writeFileUTF8 pathB $ T.unpack bContent
uriA <- getDocUri "A/A.hs"
Just pathA <- pure $ uriToFilePath uriA
uriA <- pure $
let (drive, suffix) = splitDrive pathA
in filePathToUri (joinDrive (lower drive) suffix)
let itemA = TextDocumentItem uriA "haskell" 0 aContent
let a = TextDocumentIdentifier uriA
sendNotification TextDocumentDidOpen (DidOpenTextDocumentParams itemA)
diagsNot <- skipManyTill anyMessage diagnostic
let PublishDiagnosticsParams fileUri diags = _params (diagsNot :: PublishDiagnosticsNotification)
-- Check that if we put a lower-case drive in for A.A
-- the diagnostics for A.B will also be lower-case.
liftIO $ fileUri @?= uriB
let msg = _message (head (toList diags) :: Diagnostic)
liftIO $ unless ("redundant" `T.isInfixOf` msg) $
assertFailure ("Expected redundant import but got " <> T.unpack msg)
closeDoc a
, testSessionWait "haddock parse error" $ do
let fooContent = T.unlines
[ "module Foo where"
, "foo :: Int"
, "foo = 1 {-|-}"
]
_ <- createDoc "Foo.hs" "haskell" fooContent
expectDiagnostics
[ ( "Foo.hs"
, [(DsError, (2, 8), "Parse error on input")
]
)
]
, testSessionWait "strip file path" $ do
let
name = "Testing"
content = T.unlines
[ "module " <> name <> " where"
, "value :: Maybe ()"
, "value = [()]"
]
_ <- createDoc (T.unpack name <> ".hs") "haskell" content
notification <- skipManyTill anyMessage diagnostic
let
offenders =
Lsp.params .
Lsp.diagnostics .
Lens.folded .
Lsp.message .
Lens.filtered (T.isInfixOf ("/" <> name <> ".hs:"))
failure msg = liftIO $ assertFailure $ "Expected file path to be stripped but got " <> T.unpack msg
Lens.mapMOf_ offenders failure notification
]
codeActionTests :: TestTree
codeActionTests = testGroup "code actions"
[ renameActionTests
, typeWildCardActionTests
, removeImportTests
, extendImportTests
, suggestImportTests
, addExtensionTests
, fixConstructorImportTests
, importRenameActionTests
, fillTypedHoleTests
, addSigActionTests
, insertNewDefinitionTests
]
codeLensesTests :: TestTree
codeLensesTests = testGroup "code lenses"
[ addSigLensesTests
]
watchedFilesTests :: TestTree
watchedFilesTests = testGroup "watched files"
[ testSession' "workspace files" $ \sessionDir -> do
liftIO $ writeFile (sessionDir </> "hie.yaml") "cradle: {direct: {arguments: [\"-isrc\"]}}"
_doc <- createDoc "A.hs" "haskell" "{-#LANGUAGE NoImplicitPrelude #-}\nmodule A where\nimport WatchedFilesMissingModule"
watchedFileRegs <- getWatchedFilesSubscriptionsUntil @PublishDiagnosticsNotification
-- Expect 4 subscriptions (A does not get any because it's VFS):
-- - /path-to-workspace/WatchedFilesMissingModule.hs
-- - /path-to-workspace/WatchedFilesMissingModule.lhs
-- - /path-to-workspace/src/WatchedFilesMissingModule.hs
-- - /path-to-workspace/src/WatchedFilesMissingModule.lhs
liftIO $ length watchedFileRegs @?= 4
, testSession' "non workspace file" $ \sessionDir -> do
liftIO $ writeFile (sessionDir </> "hie.yaml") "cradle: {direct: {arguments: [\"-i/tmp\"]}}"
_doc <- createDoc "A.hs" "haskell" "{-# LANGUAGE NoImplicitPrelude#-}\nmodule A where\nimport WatchedFilesMissingModule"
watchedFileRegs <- getWatchedFilesSubscriptionsUntil @PublishDiagnosticsNotification
-- Expect 2 subscriptions (/tmp does not get any as it is out of the workspace):
-- - /path-to-workspace/WatchedFilesMissingModule.hs
-- - /path-to-workspace/WatchedFilesMissingModule.lhs
liftIO $ length watchedFileRegs @?= 2
-- TODO add a test for didChangeWorkspaceFolder
]
renameActionTests :: TestTree
renameActionTests = testGroup "rename actions"
[ testSession "change to local variable name" $ do
let content = T.unlines
[ "module Testing where"
, "foo :: Int -> Int"
, "foo argName = argNme"
]
doc <- createDoc "Testing.hs" "haskell" content
_ <- waitForDiagnostics
action <- findCodeAction doc (Range (Position 2 14) (Position 2 20)) "Replace with ‘argName’"
executeCodeAction action
contentAfterAction <- documentContents doc
let expectedContentAfterAction = T.unlines
[ "module Testing where"
, "foo :: Int -> Int"
, "foo argName = argName"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "change to name of imported function" $ do
let content = T.unlines
[ "module Testing where"
, "import Data.Maybe (maybeToList)"
, "foo :: Maybe a -> [a]"
, "foo = maybToList"
]
doc <- createDoc "Testing.hs" "haskell" content
_ <- waitForDiagnostics
action <- findCodeAction doc (Range (Position 3 6) (Position 3 16)) "Replace with ‘maybeToList’"
executeCodeAction action
contentAfterAction <- documentContents doc
let expectedContentAfterAction = T.unlines
[ "module Testing where"
, "import Data.Maybe (maybeToList)"
, "foo :: Maybe a -> [a]"
, "foo = maybeToList"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "suggest multiple local variable names" $ do
let content = T.unlines
[ "module Testing where"
, "foo :: Char -> Char -> Char -> Char"
, "foo argument1 argument2 argument3 = argumentX"
]
doc <- createDoc "Testing.hs" "haskell" content
_ <- waitForDiagnostics
_ <- findCodeActions doc (Range (Position 2 36) (Position 2 45))
["Replace with ‘argument1’", "Replace with ‘argument2’", "Replace with ‘argument3’"]
return()
, testSession "change infix function" $ do
let content = T.unlines
[ "module Testing where"
, "monus :: Int -> Int"
, "monus x y = max 0 (x - y)"
, "foo x y = x `monnus` y"
]
doc <- createDoc "Testing.hs" "haskell" content
_ <- waitForDiagnostics
actionsOrCommands <- getCodeActions doc (Range (Position 3 12) (Position 3 20))
[fixTypo] <- pure [action | CACodeAction action@CodeAction{ _title = actionTitle } <- actionsOrCommands, "monus" `T.isInfixOf` actionTitle ]
executeCodeAction fixTypo
contentAfterAction <- documentContents doc
let expectedContentAfterAction = T.unlines
[ "module Testing where"
, "monus :: Int -> Int"
, "monus x y = max 0 (x - y)"
, "foo x y = x `monus` y"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
]
typeWildCardActionTests :: TestTree
typeWildCardActionTests = testGroup "type wildcard actions"
[ testSession "global signature" $ do
let content = T.unlines
[ "module Testing where"
, "func :: _"
, "func x = x"
]
doc <- createDoc "Testing.hs" "haskell" content
_ <- waitForDiagnostics
actionsOrCommands <- getCodeActions doc (Range (Position 2 1) (Position 2 10))
let [addSignature] = [action | CACodeAction action@CodeAction { _title = actionTitle } <- actionsOrCommands
, "Use type signature" `T.isInfixOf` actionTitle
]
executeCodeAction addSignature
contentAfterAction <- documentContents doc
let expectedContentAfterAction = T.unlines
[ "module Testing where"
, "func :: (p -> p)"
, "func x = x"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "multi-line message" $ do
let content = T.unlines
[ "module Testing where"
, "func :: _"
, "func x y = x + y"
]
doc <- createDoc "Testing.hs" "haskell" content
_ <- waitForDiagnostics
actionsOrCommands <- getCodeActions doc (Range (Position 2 1) (Position 2 10))
let [addSignature] = [action | CACodeAction action@CodeAction { _title = actionTitle } <- actionsOrCommands
, "Use type signature" `T.isInfixOf` actionTitle
]
executeCodeAction addSignature
contentAfterAction <- documentContents doc
let expectedContentAfterAction = T.unlines
[ "module Testing where"
, "func :: (Integer -> Integer -> Integer)"
, "func x y = x + y"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "local signature" $ do
let content = T.unlines
[ "module Testing where"
, "func :: Int -> Int"
, "func x ="
, " let y :: _"
, " y = x * 2"
, " in y"
]
doc <- createDoc "Testing.hs" "haskell" content
_ <- waitForDiagnostics
actionsOrCommands <- getCodeActions doc (Range (Position 4 1) (Position 4 10))
let [addSignature] = [action | CACodeAction action@CodeAction { _title = actionTitle } <- actionsOrCommands
, "Use type signature" `T.isInfixOf` actionTitle
]
executeCodeAction addSignature
contentAfterAction <- documentContents doc
let expectedContentAfterAction = T.unlines
[ "module Testing where"
, "func :: Int -> Int"
, "func x ="
, " let y :: (Int)"
, " y = x * 2"
, " in y"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
]
removeImportTests :: TestTree
removeImportTests = testGroup "remove import actions"
[ testSession "redundant" $ do
let contentA = T.unlines
[ "module ModuleA where"
]
_docA <- createDoc "ModuleA.hs" "haskell" contentA
let contentB = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import ModuleA"
, "stuffB :: Integer"
, "stuffB = 123"
]
docB <- createDoc "ModuleB.hs" "haskell" contentB
_ <- waitForDiagnostics
[CACodeAction action@CodeAction { _title = actionTitle }]
<- getCodeActions docB (Range (Position 2 0) (Position 2 5))
liftIO $ "Remove import" @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents docB
let expectedContentAfterAction = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "stuffB :: Integer"
, "stuffB = 123"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "qualified redundant" $ do
let contentA = T.unlines
[ "module ModuleA where"
]
_docA <- createDoc "ModuleA.hs" "haskell" contentA
let contentB = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import qualified ModuleA"
, "stuffB :: Integer"
, "stuffB = 123"
]
docB <- createDoc "ModuleB.hs" "haskell" contentB
_ <- waitForDiagnostics
[CACodeAction action@CodeAction { _title = actionTitle }]
<- getCodeActions docB (Range (Position 2 0) (Position 2 5))
liftIO $ "Remove import" @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents docB
let expectedContentAfterAction = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "stuffB :: Integer"
, "stuffB = 123"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "redundant binding" $ do
let contentA = T.unlines
[ "module ModuleA where"
, "stuffA = False"
, "stuffB :: Integer"
, "stuffB = 123"
, "stuffC = ()"
]
_docA <- createDoc "ModuleA.hs" "haskell" contentA
let contentB = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import ModuleA (stuffA, stuffB, stuffC, stuffA)"
, "main = print stuffB"
]
docB <- createDoc "ModuleB.hs" "haskell" contentB
_ <- waitForDiagnostics
[CACodeAction action@CodeAction { _title = actionTitle }]
<- getCodeActions docB (Range (Position 2 0) (Position 2 5))
liftIO $ "Remove stuffA, stuffC from import" @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents docB
let expectedContentAfterAction = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import ModuleA (stuffB)"
, "main = print stuffB"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "redundant operator" $ do
let contentA = T.unlines
[ "module ModuleA where"
, "a !! b = a"
, "a <?> b = a"
, "stuffB :: Integer"
, "stuffB = 123"
]
_docA <- createDoc "ModuleA.hs" "haskell" contentA
let contentB = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import qualified ModuleA as A ((<?>), stuffB, (!!))"
, "main = print A.stuffB"
]
docB <- createDoc "ModuleB.hs" "haskell" contentB
_ <- waitForDiagnostics
[CACodeAction action@CodeAction { _title = actionTitle }]
<- getCodeActions docB (Range (Position 2 0) (Position 2 5))
liftIO $ "Remove !!, <?> from import" @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents docB
let expectedContentAfterAction = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import qualified ModuleA as A (stuffB)"
, "main = print A.stuffB"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "redundant all import" $ do
let contentA = T.unlines
[ "module ModuleA where"
, "data A = A"
, "stuffB :: Integer"
, "stuffB = 123"
]
_docA <- createDoc "ModuleA.hs" "haskell" contentA
let contentB = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import ModuleA (A(..), stuffB)"
, "main = print stuffB"
]
docB <- createDoc "ModuleB.hs" "haskell" contentB
_ <- waitForDiagnostics
[CACodeAction action@CodeAction { _title = actionTitle }]
<- getCodeActions docB (Range (Position 2 0) (Position 2 5))
liftIO $ "Remove A from import" @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents docB
let expectedContentAfterAction = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import ModuleA (stuffB)"
, "main = print stuffB"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
, testSession "redundant constructor import" $ do
let contentA = T.unlines
[ "module ModuleA where"
, "data D = A | B"
, "data E = F"
]
_docA <- createDoc "ModuleA.hs" "haskell" contentA
let contentB = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import ModuleA (D(A,B), E(F))"
, "main = B"
]
docB <- createDoc "ModuleB.hs" "haskell" contentB
_ <- waitForDiagnostics
[CACodeAction action@CodeAction { _title = actionTitle }]
<- getCodeActions docB (Range (Position 2 0) (Position 2 5))
liftIO $ "Remove A, E, F from import" @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents docB
let expectedContentAfterAction = T.unlines
[ "{-# OPTIONS_GHC -Wunused-imports #-}"
, "module ModuleB where"
, "import ModuleA (D(B))"
, "main = B"
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
]
extendImportTests :: TestTree
extendImportTests = testGroup "extend import actions"
[ testSession "extend single line import with value" $ template
(T.unlines
[ "module ModuleA where"
, "stuffA :: Double"
, "stuffA = 0.00750"
, "stuffB :: Integer"
, "stuffB = 123"
])
(T.unlines
[ "module ModuleB where"
, "import ModuleA as A (stuffB)"
, "main = print (stuffA, stuffB)"
])
(Range (Position 3 17) (Position 3 18))
"Add stuffA to the import list of ModuleA"
(T.unlines
[ "module ModuleB where"
, "import ModuleA as A (stuffA, stuffB)"
, "main = print (stuffA, stuffB)"
])
, testSession "extend single line import with operator" $ template
(T.unlines
[ "module ModuleA where"
, "(.*) :: Integer -> Integer -> Integer"
, "x .* y = x * y"
, "stuffB :: Integer"
, "stuffB = 123"
])
(T.unlines
[ "module ModuleB where"
, "import ModuleA as A (stuffB)"
, "main = print (stuffB .* stuffB)"
])
(Range (Position 3 17) (Position 3 18))
"Add .* to the import list of ModuleA"
(T.unlines
[ "module ModuleB where"
, "import ModuleA as A ((.*), stuffB)"
, "main = print (stuffB .* stuffB)"
])
, testSession "extend single line import with type" $ template
(T.unlines
[ "module ModuleA where"
, "type A = Double"
])
(T.unlines
[ "module ModuleB where"
, "import ModuleA ()"
, "b :: A"
, "b = 0"
])
(Range (Position 2 5) (Position 2 5))
"Add A to the import list of ModuleA"
(T.unlines
[ "module ModuleB where"
, "import ModuleA (A)"
, "b :: A"
, "b = 0"
])
, (`xfail` "known broken") $ testSession "extend single line import with constructor" $ template
(T.unlines
[ "module ModuleA where"
, "data A = Constructor"
])
(T.unlines
[ "module ModuleB where"
, "import ModuleA (A)"
, "b :: A"
, "b = Constructor"
])
(Range (Position 2 5) (Position 2 5))
"Add Constructor to the import list of ModuleA"
(T.unlines
[ "module ModuleB where"
, "import ModuleA (A(Constructor))"
, "b :: A"
, "b = Constructor"
])
, testSession "extend single line qualified import with value" $ template
(T.unlines
[ "module ModuleA where"
, "stuffA :: Double"
, "stuffA = 0.00750"
, "stuffB :: Integer"
, "stuffB = 123"
])
(T.unlines
[ "module ModuleB where"
, "import qualified ModuleA as A (stuffB)"
, "main = print (A.stuffA, A.stuffB)"
])
(Range (Position 3 17) (Position 3 18))
"Add stuffA to the import list of ModuleA"
(T.unlines
[ "module ModuleB where"
, "import qualified ModuleA as A (stuffA, stuffB)"
, "main = print (A.stuffA, A.stuffB)"
])
, testSession "extend multi line import with value" $ template
(T.unlines
[ "module ModuleA where"
, "stuffA :: Double"
, "stuffA = 0.00750"
, "stuffB :: Integer"
, "stuffB = 123"
])
(T.unlines
[ "module ModuleB where"
, "import ModuleA (stuffB"
, " )"
, "main = print (stuffA, stuffB)"
])
(Range (Position 3 17) (Position 3 18))
"Add stuffA to the import list of ModuleA"
(T.unlines
[ "module ModuleB where"
, "import ModuleA (stuffA, stuffB"
, " )"
, "main = print (stuffA, stuffB)"
])
]
where
template contentA contentB range expectedAction expectedContentB = do
_docA <- createDoc "ModuleA.hs" "haskell" contentA
docB <- createDoc "ModuleB.hs" "haskell" contentB
_ <- waitForDiagnostics
CACodeAction action@CodeAction { _title = actionTitle } : _
<- sortOn (\(CACodeAction CodeAction{_title=x}) -> x) <$>
getCodeActions docB range
liftIO $ expectedAction @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents docB
liftIO $ expectedContentB @=? contentAfterAction
suggestImportTests :: TestTree
suggestImportTests = testGroup "suggest import actions"
[ testGroup "Dont want suggestion"
[ -- extend import
test False ["Data.List.NonEmpty ()"] "f = nonEmpty" [] "import Data.List.NonEmpty (nonEmpty)"
-- data constructor
, test False [] "f = First" [] "import Data.Monoid (First)"
-- internal module
, test False [] "f :: Typeable a => a" ["f = undefined"] "import Data.Typeable.Internal (Typeable)"
-- package not in scope
, test False [] "f = quickCheck" [] "import Test.QuickCheck (quickCheck)"
]
, testGroup "want suggestion"
[ test True [] "f = nonEmpty" [] "import Data.List.NonEmpty (nonEmpty)"
, test True [] "f = (:|)" [] "import Data.List.NonEmpty (NonEmpty((:|)))"
, test True [] "f :: Natural" ["f = undefined"] "import Numeric.Natural (Natural)"
, test True [] "f :: NonEmpty ()" ["f = () :| []"] "import Data.List.NonEmpty (NonEmpty)"
, test True [] "f = First" [] "import Data.Monoid (First(First))"
, test True [] "f = Endo" [] "import Data.Monoid (Endo(Endo))"
, test True [] "f = Version" [] "import Data.Version (Version(Version))"
, test True [] "f ExitSuccess = ()" [] "import System.Exit (ExitCode(ExitSuccess))"
, test True [] "f = AssertionFailed" [] "import Control.Exception (AssertionFailed(AssertionFailed))"
, test True ["Prelude"] "f = nonEmpty" [] "import Data.List.NonEmpty (nonEmpty)"
, test True [] "f :: Alternative f => f ()" ["f = undefined"] "import Control.Applicative (Alternative)"
, test True [] "f = empty" [] "import Control.Applicative (Alternative(empty))"
, test True [] "f = (&)" [] "import Data.Function ((&))"
, test True [] "f = NE.nonEmpty" [] "import qualified Data.List.NonEmpty as NE"
, test True [] "f :: Typeable a => a" ["f = undefined"] "import Data.Typeable (Typeable)"
, test True [] "f = pack" [] "import Data.Text (pack)"
, test True [] "f :: Text" ["f = undefined"] "import Data.Text (Text)"
, test True [] "f = [] & id" [] "import Data.Function ((&))"
, test True [] "f = (&) [] id" [] "import Data.Function ((&))"
]
]
where
test wanted imps def other newImp = testSession' (T.unpack def) $ \dir -> do
let before = T.unlines $ "module A where" : ["import " <> x | x <- imps] ++ def : other
after = T.unlines $ "module A where" : ["import " <> x | x <- imps] ++ [newImp] ++ def : other
cradle = "cradle: {direct: {arguments: [-hide-all-packages, -package, base, -package, text, -package-env, -]}}"
liftIO $ writeFileUTF8 (dir </> "hie.yaml") cradle
doc <- createDoc "Test.hs" "haskell" before
_diags <- waitForDiagnostics
let defLine = length imps + 1
range = Range (Position defLine 0) (Position defLine maxBound)
actions <- getCodeActions doc range
if wanted
then do
action <- liftIO $ pickActionWithTitle newImp actions
executeCodeAction action
contentAfterAction <- documentContents doc
liftIO $ after @=? contentAfterAction
else
liftIO $ [_title | CACodeAction CodeAction{_title} <- actions, _title == newImp ] @?= []
addExtensionTests :: TestTree
addExtensionTests = testGroup "add language extension actions"
[ testSession "add NamedFieldPuns language extension" $ template
(T.unlines
[ "module Module where"
, ""
, "data A = A { getA :: Bool }"
, ""
, "f :: A -> Bool"
, "f A { getA } = getA"
])
(Range (Position 0 0) (Position 0 0))
"Add NamedFieldPuns extension"
(T.unlines
[ "{-# LANGUAGE NamedFieldPuns #-}"
, "module Module where"
, ""
, "data A = A { getA :: Bool }"
, ""
, "f :: A -> Bool"
, "f A { getA } = getA"
])
, testSession "add RecordWildCards language extension" $ template
(T.unlines
[ "module Module where"
, ""
, "data A = A { getA :: Bool }"
, ""
, "f :: A -> Bool"
, "f A { .. } = getA"
])
(Range (Position 0 0) (Position 0 0))
"Add RecordWildCards extension"
(T.unlines
[ "{-# LANGUAGE RecordWildCards #-}"
, "module Module where"
, ""
, "data A = A { getA :: Bool }"
, ""
, "f :: A -> Bool"
, "f A { .. } = getA"
])
]
where
template initialContent range expectedAction expectedContents = do
doc <- createDoc "Module.hs" "haskell" initialContent
_ <- waitForDiagnostics
CACodeAction action@CodeAction { _title = actionTitle } : _
<- sortOn (\(CACodeAction CodeAction{_title=x}) -> x) <$>
getCodeActions doc range
liftIO $ expectedAction @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents doc
liftIO $ expectedContents @=? contentAfterAction
insertNewDefinitionTests :: TestTree
insertNewDefinitionTests = testGroup "insert new definition actions"
[ testSession "insert new function definition" $ do
let txtB =
["foo True = select [True]"
, ""
,"foo False = False"
]
txtB' =
[""
,"someOtherCode = ()"
]
docB <- createDoc "ModuleB.hs" "haskell" (T.unlines $ txtB ++ txtB')
_ <- waitForDiagnostics
CACodeAction action@CodeAction { _title = actionTitle } : _
<- sortOn (\(CACodeAction CodeAction{_title=x}) -> x) <$>
getCodeActions docB (R 1 0 1 50)
liftIO $ actionTitle @?= "Define select :: [Bool] -> Bool"
executeCodeAction action
contentAfterAction <- documentContents docB
liftIO $ contentAfterAction @?= T.unlines (txtB ++
[ ""
, "select :: [Bool] -> Bool"
, "select = error \"not implemented\""
]
++ txtB')
, testSession "define a hole" $ do
let txtB =
["foo True = _select [True]"
, ""
,"foo False = False"
]
txtB' =
[""
,"someOtherCode = ()"
]
docB <- createDoc "ModuleB.hs" "haskell" (T.unlines $ txtB ++ txtB')
_ <- waitForDiagnostics
CACodeAction action@CodeAction { _title = actionTitle } : _
<- sortOn (\(CACodeAction CodeAction{_title=x}) -> x) <$>
getCodeActions docB (R 1 0 1 50)
liftIO $ actionTitle @?= "Define select :: [Bool] -> Bool"
executeCodeAction action
contentAfterAction <- documentContents docB
liftIO $ contentAfterAction @?= T.unlines (
["foo True = select [True]"
, ""
,"foo False = False"
, ""
, "select :: [Bool] -> Bool"
, "select = error \"not implemented\""
]
++ txtB')
]
fixConstructorImportTests :: TestTree
fixConstructorImportTests = testGroup "fix import actions"
[ testSession "fix constructor import" $ template
(T.unlines
[ "module ModuleA where"
, "data A = Constructor"
])
(T.unlines
[ "module ModuleB where"
, "import ModuleA(Constructor)"
])
(Range (Position 1 10) (Position 1 11))
"Fix import of A(Constructor)"
(T.unlines
[ "module ModuleB where"
, "import ModuleA(A(Constructor))"
])
]
where
template contentA contentB range expectedAction expectedContentB = do
_docA <- createDoc "ModuleA.hs" "haskell" contentA
docB <- createDoc "ModuleB.hs" "haskell" contentB
_diags <- waitForDiagnostics
CACodeAction action@CodeAction { _title = actionTitle } : _
<- sortOn (\(CACodeAction CodeAction{_title=x}) -> x) <$>
getCodeActions docB range
liftIO $ expectedAction @=? actionTitle
executeCodeAction action
contentAfterAction <- documentContents docB
liftIO $ expectedContentB @=? contentAfterAction
importRenameActionTests :: TestTree
importRenameActionTests = testGroup "import rename actions"
[ testSession "Data.Mape -> Data.Map" $ check "Map"
, testSession "Data.Mape -> Data.Maybe" $ check "Maybe" ] where
check modname = do
let content = T.unlines
[ "module Testing where"
, "import Data.Mape"
]
doc <- createDoc "Testing.hs" "haskell" content
_ <- waitForDiagnostics
actionsOrCommands <- getCodeActions doc (Range (Position 2 8) (Position 2 16))
let [changeToMap] = [action | CACodeAction action@CodeAction{ _title = actionTitle } <- actionsOrCommands, ("Data." <> modname) `T.isInfixOf` actionTitle ]
executeCodeAction changeToMap
contentAfterAction <- documentContents doc
let expectedContentAfterAction = T.unlines
[ "module Testing where"
, "import Data." <> modname
]
liftIO $ expectedContentAfterAction @=? contentAfterAction
fillTypedHoleTests :: TestTree
fillTypedHoleTests = let
sourceCode :: T.Text -> T.Text -> T.Text -> T.Text
sourceCode a b c = T.unlines
[ "module Testing where"
, ""
, "globalConvert :: Int -> String"
, "globalConvert = undefined"
, ""
, "globalInt :: Int"
, "globalInt = 3"
, ""
, "bar :: Int -> Int -> String"
, "bar n parameterInt = " <> a <> " (n + " <> b <> " + " <> c <> ") where"
, " localConvert = (flip replicate) 'x'"
]
check :: T.Text -> T.Text -> T.Text -> T.Text -> T.Text -> T.Text -> T.Text -> TestTree
check actionTitle
oldA oldB oldC
newA newB newC = testSession (T.unpack actionTitle) $ do
let originalCode = sourceCode oldA oldB oldC
let expectedCode = sourceCode newA newB newC
doc <- createDoc "Testing.hs" "haskell" originalCode
_ <- waitForDiagnostics
actionsOrCommands <- getCodeActions doc (Range (Position 9 0) (Position 9 maxBound))
chosenAction <- liftIO $ pickActionWithTitle actionTitle actionsOrCommands
executeCodeAction chosenAction
modifiedCode <- documentContents doc
liftIO $ expectedCode @=? modifiedCode
in
testGroup "fill typed holes"
[ check "replace hole `_` with show"
"_" "n" "n"
"show" "n" "n"
, check "replace hole `_` with globalConvert"
"_" "n" "n"
"globalConvert" "n" "n"
#if MIN_GHC_API_VERSION(8,6,0)
, check "replace hole `_convertme` with localConvert"
"_convertme" "n" "n"
"localConvert" "n" "n"
#endif
, check "replace hole `_b` with globalInt"
"_a" "_b" "_c"
"_a" "globalInt" "_c"
, check "replace hole `_c` with globalInt"
"_a" "_b" "_c"
"_a" "_b" "globalInt"
#if MIN_GHC_API_VERSION(8,6,0)
, check "replace hole `_c` with parameterInt"
"_a" "_b" "_c"
"_a" "_b" "parameterInt"
#endif
]
addSigActionTests :: TestTree
addSigActionTests = let
header = "{-# OPTIONS_GHC -Wmissing-signatures -Wmissing-pattern-synonym-signatures #-}"
moduleH = "{-# LANGUAGE PatternSynonyms #-}\nmodule Sigs where"
before def = T.unlines [header, moduleH, def]
after' def sig = T.unlines [header, moduleH, sig, def]
def >:: sig = testSession (T.unpack def) $ do
let originalCode = before def
let expectedCode = after' def sig
doc <- createDoc "Sigs.hs" "haskell" originalCode
_ <- waitForDiagnostics
actionsOrCommands <- getCodeActions doc (Range (Position 3 1) (Position 3 maxBound))
chosenAction <- liftIO $ pickActionWithTitle ("add signature: " <> sig) actionsOrCommands
executeCodeAction chosenAction
modifiedCode <- documentContents doc
liftIO $ expectedCode @=? modifiedCode
in
testGroup "add signature"
[ "abc = True" >:: "abc :: Bool"
, "foo a b = a + b" >:: "foo :: Num a => a -> a -> a"
, "bar a b = show $ a + b" >:: "bar :: (Show a, Num a) => a -> a -> String"
, "(!!!) a b = a > b" >:: "(!!!) :: Ord a => a -> a -> Bool"
, "a >>>> b = a + b" >:: "(>>>>) :: Num a => a -> a -> a"
, "a `haha` b = a b" >:: "haha :: (t1 -> t2) -> t1 -> t2"
, "pattern Some a = Just a" >:: "pattern Some :: a -> Maybe a"
]
addSigLensesTests :: TestTree
addSigLensesTests = let
missing = "{-# OPTIONS_GHC -Wmissing-signatures -Wmissing-pattern-synonym-signatures -Wunused-matches #-}"
notMissing = "{-# OPTIONS_GHC -Wunused-matches #-}"
moduleH = "{-# LANGUAGE PatternSynonyms #-}\nmodule Sigs where"
other = T.unlines ["f :: Integer -> Integer", "f x = 3"]
before withMissing def
= T.unlines $ (if withMissing then (missing :) else (notMissing :)) [moduleH, def, other]
after' withMissing def sig
= T.unlines $ (if withMissing then (missing :) else (notMissing :)) [moduleH, sig, def, other]
sigSession withMissing def sig = testSession (T.unpack def) $ do
let originalCode = before withMissing def
let expectedCode = after' withMissing def sig
doc <- createDoc "Sigs.hs" "haskell" originalCode
[CodeLens {_command = Just c}] <- getCodeLenses doc
executeCommand c
modifiedCode <- getDocumentEdit doc
liftIO $ expectedCode @=? modifiedCode
in
testGroup "add signature"
[ testGroup title
[ sigSession enableWarnings "abc = True" "abc :: Bool"
, sigSession enableWarnings "foo a b = a + b" "foo :: Num a => a -> a -> a"
, sigSession enableWarnings "bar a b = show $ a + b" "bar :: (Show a, Num a) => a -> a -> String"
, sigSession enableWarnings "(!!!) a b = a > b" "(!!!) :: Ord a => a -> a -> Bool"
, sigSession enableWarnings "a >>>> b = a + b" "(>>>>) :: Num a => a -> a -> a"
, sigSession enableWarnings "a `haha` b = a b" "haha :: (t1 -> t2) -> t1 -> t2"
, sigSession enableWarnings "pattern Some a = Just a" "pattern Some :: a -> Maybe a"
]
| (title, enableWarnings) <-
[("with warnings enabled", True)
,("with warnings disabled", False)
]
]
checkDefs :: [Location] -> Session [Expect] -> Session ()
checkDefs defs mkExpectations = traverse_ check =<< mkExpectations where
check (ExpectRange expectedRange) = do
assertNDefinitionsFound 1 defs
assertRangeCorrect (head defs) expectedRange
check (ExpectLocation expectedLocation) = do
assertNDefinitionsFound 1 defs
liftIO $ head defs @?= expectedLocation
check ExpectNoDefinitions = do
assertNDefinitionsFound 0 defs
check ExpectExternFail = liftIO $ assertFailure "Expecting to fail to find in external file"
check _ = pure () -- all other expectations not relevant to getDefinition
assertNDefinitionsFound :: Int -> [a] -> Session ()
assertNDefinitionsFound n defs = liftIO $ assertEqual "number of definitions" n (length defs)
assertRangeCorrect Location{_range = foundRange} expectedRange =
liftIO $ expectedRange @=? foundRange
findDefinitionAndHoverTests :: TestTree
findDefinitionAndHoverTests = let
tst (get, check) pos targetRange title = testSessionWithExtraFiles "hover" title $ \dir -> do
doc <- openTestDataDoc (dir </> sourceFilePath)
found <- get doc pos
check found targetRange
checkHover :: Maybe Hover -> Session [Expect] -> Session ()
checkHover hover expectations = traverse_ check =<< expectations where
check expected =
case hover of
Nothing -> unless (expected == ExpectNoHover) $ liftIO $ assertFailure "no hover found"
Just Hover{_contents = (HoverContents MarkupContent{_value = msg})
,_range = rangeInHover } ->
case expected of
ExpectRange expectedRange -> checkHoverRange expectedRange rangeInHover msg
ExpectHoverRange expectedRange -> checkHoverRange expectedRange rangeInHover msg
ExpectHoverText snippets -> liftIO $ traverse_ (`assertFoundIn` msg) snippets
ExpectNoHover -> liftIO $ assertFailure $ "Expected no hover but got " <> show hover
_ -> pure () -- all other expectations not relevant to hover
_ -> liftIO $ assertFailure $ "test not expecting this kind of hover info" <> show hover
extractLineColFromHoverMsg :: T.Text -> [T.Text]
extractLineColFromHoverMsg = T.splitOn ":" . head . T.splitOn "*" . last . T.splitOn (sourceFileName <> ":")
checkHoverRange :: Range -> Maybe Range -> T.Text -> Session ()
checkHoverRange expectedRange rangeInHover msg =
let
lineCol = extractLineColFromHoverMsg msg
-- looks like hovers use 1-based numbering while definitions use 0-based
-- turns out that they are stored 1-based in RealSrcLoc by GHC itself.
adjust Position{_line = l, _character = c} =
Position{_line = l + 1, _character = c + 1}
in
case map (read . T.unpack) lineCol of
[l,c] -> liftIO $ (adjust $ _start expectedRange) @=? Position l c
_ -> liftIO $ assertFailure $
"expected: " <> show ("[...]" <> sourceFileName <> ":<LINE>:<COL>**[...]", Just expectedRange) <>
"\n but got: " <> show (msg, rangeInHover)
assertFoundIn :: T.Text -> T.Text -> Assertion
assertFoundIn part whole = assertBool
(T.unpack $ "failed to find: `" <> part <> "` in hover message:\n" <> whole)
(part `T.isInfixOf` whole)
sourceFilePath = T.unpack sourceFileName
sourceFileName = "GotoHover.hs"
mkFindTests tests = testGroup "get"
[ testGroup "definition" $ mapMaybe fst tests
, testGroup "hover" $ mapMaybe snd tests
, checkFileCompiles sourceFilePath ]
test runDef runHover look expect = testM runDef runHover look (return expect)
testM runDef runHover look expect title =
( runDef $ tst def look expect title
, runHover $ tst hover look expect title ) where
def = (getDefinitions, checkDefs)
hover = (getHover , checkHover)
--type_ = (getTypeDefinitions, checkTDefs) -- getTypeDefinitions always times out
-- search locations expectations on results
fffL4 = _start fffR ; fffR = mkRange 8 4 8 7 ; fff = [ExpectRange fffR]
fffL8 = Position 12 4 ;
fffL14 = Position 18 7 ;
aaaL14 = Position 18 20 ; aaa = [mkR 11 0 11 3]
dcL7 = Position 11 11 ; tcDC = [mkR 7 23 9 16]
dcL12 = Position 16 11 ;
xtcL5 = Position 9 11 ; xtc = [ExpectExternFail, ExpectHoverText ["Int", "Defined in ‘GHC.Types’"]]
tcL6 = Position 10 11 ; tcData = [mkR 7 0 9 16, ExpectHoverText ["TypeConstructor", "GotoHover.hs:8:1"]]
vvL16 = Position 20 12 ; vv = [mkR 20 4 20 6]
opL16 = Position 20 15 ; op = [mkR 21 2 21 4]
opL18 = Position 22 22 ; opp = [mkR 22 13 22 17]
aL18 = Position 22 20 ; apmp = [mkR 22 10 22 11]
b'L19 = Position 23 13 ; bp = [mkR 23 6 23 7]
xvL20 = Position 24 8 ; xvMsg = [ExpectExternFail, ExpectHoverText ["Data.Text.pack", ":: String -> Text"]]
clL23 = Position 27 11 ; cls = [mkR 25 0 26 20, ExpectHoverText ["MyClass", "GotoHover.hs:26:1"]]
clL25 = Position 29 9
eclL15 = Position 19 8 ; ecls = [ExpectExternFail, ExpectHoverText ["Num", "Defined in ‘GHC.Num’"]]
dnbL29 = Position 33 18 ; dnb = [ExpectHoverText [":: ()"], mkR 33 12 33 21]
dnbL30 = Position 34 23
lcbL33 = Position 37 26 ; lcb = [ExpectHoverText [":: Char"], mkR 37 26 37 27]
lclL33 = Position 37 22
mclL36 = Position 40 1 ; mcl = [mkR 40 0 40 14]
mclL37 = Position 41 1
spaceL37 = Position 41 24 ; space = [ExpectNoDefinitions, ExpectHoverText [":: Char"]]
docL41 = Position 45 1 ; doc = [ExpectHoverText ["Recognizable docs: kpqz"]]
; constr = [ExpectHoverText ["Monad m"]]
eitL40 = Position 44 28 ; kindE = [ExpectHoverText [":: * -> * -> *\n"]]
intL40 = Position 44 34 ; kindI = [ExpectHoverText [":: *\n"]]
tvrL40 = Position 44 37 ; kindV = [ExpectHoverText [":: * -> *\n"]]
intL41 = Position 45 20 ; litI = [ExpectHoverText ["7518"]]
chrL36 = Position 41 24 ; litC = [ExpectHoverText ["'f'"]]
txtL8 = Position 12 14 ; litT = [ExpectHoverText ["\"dfgy\""]]
lstL43 = Position 47 12 ; litL = [ExpectHoverText ["[8391 :: Int, 6268]"]]
outL45 = Position 49 3 ; outSig = [ExpectHoverText ["outer", "Bool"], mkR 46 0 46 5]
innL48 = Position 52 5 ; innSig = [ExpectHoverText ["inner", "Char"], mkR 49 2 49 7]
imported = Position 56 13 ; importedSig = getDocUri "Foo.hs" >>= \foo -> return [ExpectHoverText ["foo", "Foo"], mkL foo 4 0 4 3]
reexported = Position 55 14 ; reexportedSig = getDocUri "Bar.hs" >>= \bar -> return [ExpectHoverText ["Bar", "Bar"], mkL bar 2 0 2 14]
in
mkFindTests
-- def hover look expect
[ test yes yes fffL4 fff "field in record definition"
, test broken broken fffL8 fff "field in record construction #71"
, test yes yes fffL14 fff "field name used as accessor" -- 120 in Calculate.hs
, test yes yes aaaL14 aaa "top-level name" -- 120
, test yes yes dcL7 tcDC "data constructor record #247"
, test yes yes dcL12 tcDC "data constructor plain" -- 121
, test yes yes tcL6 tcData "type constructor #248" -- 147
, test broken yes xtcL5 xtc "type constructor external #248,249"
, test broken yes xvL20 xvMsg "value external package #249" -- 120
, test yes yes vvL16 vv "plain parameter" -- 120
, test yes yes aL18 apmp "pattern match name" -- 120
, test yes yes opL16 op "top-level operator" -- 120, 123
, test yes yes opL18 opp "parameter operator" -- 120
, test yes yes b'L19 bp "name in backticks" -- 120
, test yes yes clL23 cls "class in instance declaration #250"
, test yes yes clL25 cls "class in signature #250" -- 147
, test broken yes eclL15 ecls "external class in signature #249,250"
, test yes yes dnbL29 dnb "do-notation bind" -- 137
, test yes yes dnbL30 dnb "do-notation lookup"
, test yes yes lcbL33 lcb "listcomp bind" -- 137
, test yes yes lclL33 lcb "listcomp lookup"
, test yes yes mclL36 mcl "top-level fn 1st clause"
, test yes yes mclL37 mcl "top-level fn 2nd clause #246"
, test yes yes spaceL37 space "top-level fn on space #315"
, test no broken docL41 doc "documentation #7"
, test no yes eitL40 kindE "kind of Either #273"
, test no yes intL40 kindI "kind of Int #273"
, test no broken tvrL40 kindV "kind of (* -> *) type variable #273"
, test no yes intL41 litI "literal Int in hover info #274"
, test no yes chrL36 litC "literal Char in hover info #274"
, test no yes txtL8 litT "literal Text in hover info #274"
, test no yes lstL43 litL "literal List in hover info #274"
, test no yes docL41 constr "type constraint in hover info #283"
, test broken broken outL45 outSig "top-level signature #310"
, test broken broken innL48 innSig "inner signature #310"
, testM yes yes imported importedSig "Imported symbol"
, testM yes yes reexported reexportedSig "Imported symbol (reexported)"
]
where yes, broken :: (TestTree -> Maybe TestTree)
yes = Just -- test should run and pass
broken = Just . (`xfail` "known broken")
no = const Nothing -- don't run this test at all
checkFileCompiles :: FilePath -> TestTree
checkFileCompiles fp =
testSessionWithExtraFiles "hover" ("Does " ++ fp ++ " compile") $ \dir -> do
void (openTestDataDoc (dir </> fp))
expectNoMoreDiagnostics 0.5
pluginTests :: TestTree
pluginTests = (`xfail8101` "known broken (#556)")
$ testSessionWait "plugins" $ do
let content =
T.unlines
[ "{-# OPTIONS_GHC -fplugin GHC.TypeLits.KnownNat.Solver #-}"
, "{-# LANGUAGE DataKinds, ScopedTypeVariables, TypeOperators #-}"
, "module Testing where"
, "import Data.Proxy"
, "import GHC.TypeLits"
-- This function fails without plugins being initialized.
, "f :: forall n. KnownNat n => Proxy n -> Integer"
, "f _ = natVal (Proxy :: Proxy n) + natVal (Proxy :: Proxy (n+2))"
, "foo :: Int -> Int -> Int"
, "foo a b = a + c"
]
_ <- createDoc "Testing.hs" "haskell" content
expectDiagnostics
[ ( "Testing.hs",
[(DsError, (8, 14), "Variable not in scope: c")]
)
]
cppTests :: TestTree
cppTests =
testGroup "cpp"
[ testCase "cpp-error" $ do
let content =
T.unlines
[ "{-# LANGUAGE CPP #-}",
"module Testing where",
"#ifdef FOO",
"foo = 42"
]
-- The error locations differ depending on which C-preprocessor is used.
-- Some give the column number and others don't (hence -1). Assert either
-- of them.
(run $ expectError content (2, -1))
`catch` ( \e -> do
let _ = e :: HUnitFailure
run $ expectError content (2, 1)
)
, testSessionWait "cpp-ghcide" $ do
_ <- createDoc "A.hs" "haskell" $ T.unlines
["{-# LANGUAGE CPP #-}"
,"main ="
,"#ifdef __GHCIDE__"
," worked"
,"#else"
," failed"
,"#endif"
]
expectDiagnostics [("A.hs", [(DsError, (3, 2), "Variable not in scope: worked")])]
]
where
expectError :: T.Text -> Cursor -> Session ()
expectError content cursor = do
_ <- createDoc "Testing.hs" "haskell" content
expectDiagnostics
[ ( "Testing.hs",
[(DsError, cursor, "error: unterminated")]
)
]
expectNoMoreDiagnostics 0.5
preprocessorTests :: TestTree
preprocessorTests = testSessionWait "preprocessor" $ do
let content =
T.unlines
[ "{-# OPTIONS_GHC -F -pgmF=ghcide-test-preprocessor #-}"
, "module Testing where"
, "y = x + z" -- plugin replaces x with y, making this have only one diagnostic
]
_ <- createDoc "Testing.hs" "haskell" content
expectDiagnostics
[ ( "Testing.hs",
[(DsError, (2, 8), "Variable not in scope: z")]
)
]
safeTests :: TestTree
safeTests =
testGroup
"SafeHaskell"
[ -- Test for https://github.com/digital-asset/ghcide/issues/424
testSessionWait "load" $ do
let sourceA =
T.unlines
["{-# LANGUAGE Trustworthy #-}"
,"module A where"
,"import System.IO.Unsafe"
,"import System.IO"
,"trustWorthyId :: a -> a"
,"trustWorthyId i = unsafePerformIO $ do"
," putStrLn \"I'm safe\""
," return i"]
sourceB =
T.unlines
["{-# LANGUAGE Safe #-}"
,"module B where"
,"import A"
,"safeId :: a -> a"
,"safeId = trustWorthyId"
]
_ <- createDoc "A.hs" "haskell" sourceA
_ <- createDoc "B.hs" "haskell" sourceB
expectNoMoreDiagnostics 1 ]
thTests :: TestTree
thTests =
testGroup
"TemplateHaskell"
[ -- Test for https://github.com/digital-asset/ghcide/pull/212
testSessionWait "load" $ do
let sourceA =
T.unlines
[ "{-# LANGUAGE PackageImports #-}",
"{-# LANGUAGE TemplateHaskell #-}",
"module A where",
"import \"template-haskell\" Language.Haskell.TH",
"a :: Integer",
"a = $(litE $ IntegerL 3)"
]
sourceB =
T.unlines
[ "{-# LANGUAGE PackageImports #-}",
"{-# LANGUAGE TemplateHaskell #-}",
"module B where",
"import A",
"import \"template-haskell\" Language.Haskell.TH",
"b :: Integer",
"b = $(litE $ IntegerL $ a) + n"
]
_ <- createDoc "A.hs" "haskell" sourceA
_ <- createDoc "B.hs" "haskell" sourceB
expectDiagnostics [ ( "B.hs", [(DsError, (6, 29), "Variable not in scope: n")] ) ]
, testSessionWait "newtype-closure" $ do
let sourceA =
T.unlines
[ "{-# LANGUAGE DeriveDataTypeable #-}"
,"{-# LANGUAGE TemplateHaskell #-}"
,"module A (a) where"
,"import Data.Data"
,"import Language.Haskell.TH"
,"newtype A = A () deriving (Data)"
,"a :: ExpQ"
,"a = [| 0 |]"]
let sourceB =
T.unlines
[ "{-# LANGUAGE TemplateHaskell #-}"
,"module B where"
,"import A"
,"b :: Int"
,"b = $( a )" ]
_ <- createDoc "A.hs" "haskell" sourceA
_ <- createDoc "B.hs" "haskell" sourceB
return ()
]
completionTests :: TestTree
completionTests
= testGroup "completion"
[ testSessionWait "variable" $ do
let source = T.unlines ["module A where", "f = hea"]
docId <- createDoc "A.hs" "haskell" source
compls <- getCompletions docId (Position 1 7)
liftIO $ map dropDocs compls @?=
[complItem "head" (Just CiFunction) (Just "[a] -> a")]
let [CompletionItem { _documentation = headDocs}] = compls
checkDocText "head" headDocs [ "Defined in 'Prelude'"
#if MIN_GHC_API_VERSION(8,6,5)
, "Extract the first element of a list"
#endif
]
, testSessionWait "constructor" $ do
let source = T.unlines ["module A where", "f = Tru"]
docId <- createDoc "A.hs" "haskell" source
compls <- getCompletions docId (Position 1 7)
liftIO $ map dropDocs compls @?=
[ complItem "True" (Just CiConstructor) (Just "Bool")
#if MIN_GHC_API_VERSION(8,6,0)
, complItem "truncate" (Just CiFunction) (Just "(RealFrac a, Integral b) => a -> b")
#else
, complItem "truncate" (Just CiFunction) (Just "RealFrac a => forall b. Integral b => a -> b")
#endif
]
, testSessionWait "type" $ do
let source = T.unlines ["{-# OPTIONS_GHC -Wall #-}", "module A () where", "f :: ()", "f = ()"]
docId <- createDoc "A.hs" "haskell" source
expectDiagnostics [ ("A.hs", [(DsWarning, (3,0), "not used")]) ]
changeDoc docId [TextDocumentContentChangeEvent Nothing Nothing $ T.unlines ["{-# OPTIONS_GHC -Wall #-}", "module A () where", "f :: Bo", "f = True"]]
compls <- getCompletions docId (Position 2 7)
liftIO $ map dropDocs compls @?=
[ complItem "Bounded" (Just CiClass) (Just "* -> Constraint")
, complItem "Bool" (Just CiStruct) (Just "*") ]
let [ CompletionItem { _documentation = boundedDocs},
CompletionItem { _documentation = boolDocs } ] = compls
checkDocText "Bounded" boundedDocs [ "Defined in 'Prelude'"
#if MIN_GHC_API_VERSION(8,6,5)
, "name the upper and lower limits"
#endif
]
checkDocText "Bool" boolDocs [ "Defined in 'Prelude'" ]
, testSessionWait "qualified" $ do
let source = T.unlines ["{-# OPTIONS_GHC -Wunused-binds #-}", "module A () where", "f = ()"]
docId <- createDoc "A.hs" "haskell" source
expectDiagnostics [ ("A.hs", [(DsWarning, (2, 0), "not used")]) ]
changeDoc docId [TextDocumentContentChangeEvent Nothing Nothing $ T.unlines ["{-# OPTIONS_GHC -Wunused-binds #-}", "module A () where", "f = Prelude.hea"]]
compls <- getCompletions docId (Position 2 15)
liftIO $ map dropDocs compls @?=
[complItem "head" (Just CiFunction) (Just "[a] -> a")]
let [CompletionItem { _documentation = headDocs}] = compls
checkDocText "head" headDocs [ "Defined in 'Prelude'"
#if MIN_GHC_API_VERSION(8,6,5)
, "Extract the first element of a list"
#endif
]
, testSessionWait "keyword" $ do
let source = T.unlines ["module A where", "f = newty"]
docId <- createDoc "A.hs" "haskell" source
compls <- getCompletions docId (Position 1 9)
liftIO $ compls @?= [keywordItem "newtype"]
, testSessionWait "type context" $ do
let source = T.unlines
[ "{-# OPTIONS_GHC -Wunused-binds #-}"
, "module A () where"
, "f = f"
]
docId <- createDoc "A.hs" "haskell" source
expectDiagnostics [("A.hs", [(DsWarning, (2, 0), "not used")])]
changeDoc docId
[ TextDocumentContentChangeEvent Nothing Nothing $ T.unlines
[ "{-# OPTIONS_GHC -Wunused-binds #-}"
, "module A () where"
, "f = f"
, "g :: Intege"
]
]
-- At this point the module parses but does not typecheck.
-- This should be sufficient to detect that we are in a
-- type context and only show the completion to the type.
compls <- getCompletions docId (Position 3 11)
liftIO $ map dropDocs compls @?= [complItem "Integer"(Just CiStruct) (Just "*")]
]
where
dropDocs :: CompletionItem -> CompletionItem
dropDocs ci = ci { _documentation = Nothing }
complItem label kind ty = CompletionItem
{ _label = label
, _kind = kind
, _tags = List []
, _detail = (":: " <>) <$> ty
, _documentation = Nothing
, _deprecated = Nothing
, _preselect = Nothing
, _sortText = Nothing
, _filterText = Nothing
, _insertText = Nothing
, _insertTextFormat = Just PlainText
, _textEdit = Nothing
, _additionalTextEdits = Nothing
, _commitCharacters = Nothing
, _command = Nothing
, _xdata = Nothing
}
keywordItem label = CompletionItem
{ _label = label
, _kind = Just CiKeyword
, _tags = List []
, _detail = Nothing
, _documentation = Nothing
, _deprecated = Nothing
, _preselect = Nothing
, _sortText = Nothing
, _filterText = Nothing
, _insertText = Nothing
, _insertTextFormat = Nothing
, _textEdit = Nothing
, _additionalTextEdits = Nothing
, _commitCharacters = Nothing
, _command = Nothing
, _xdata = Nothing
}
getDocText (CompletionDocString s) = s
getDocText (CompletionDocMarkup (MarkupContent _ s)) = s
checkDocText thing Nothing _
= liftIO $ assertFailure $ "docs for " ++ thing ++ " not found"
checkDocText thing (Just doc) items
= liftIO $ assertBool ("docs for " ++ thing ++ " contain the strings") $
all (`T.isInfixOf` getDocText doc) items
outlineTests :: TestTree
outlineTests = testGroup
"outline"
[ testSessionWait "type class" $ do
let source = T.unlines ["module A where", "class A a where a :: a -> Bool"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[ moduleSymbol
"A"
(R 0 7 0 8)
[ classSymbol "A a"
(R 1 0 1 30)
[docSymbol' "a" SkMethod (R 1 16 1 30) (R 1 16 1 17)]
]
]
, testSessionWait "type class instance " $ do
let source = T.unlines ["class A a where", "instance A () where"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[ classSymbol "A a" (R 0 0 0 15) []
, docSymbol "A ()" SkInterface (R 1 0 1 19)
]
, testSessionWait "type family" $ do
let source = T.unlines ["{-# language TypeFamilies #-}", "type family A"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left [docSymbolD "A" "type family" SkClass (R 1 0 1 13)]
, testSessionWait "type family instance " $ do
let source = T.unlines
[ "{-# language TypeFamilies #-}"
, "type family A a"
, "type instance A () = ()"
]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[ docSymbolD "A a" "type family" SkClass (R 1 0 1 15)
, docSymbol "A ()" SkInterface (R 2 0 2 23)
]
, testSessionWait "data family" $ do
let source = T.unlines ["{-# language TypeFamilies #-}", "data family A"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left [docSymbolD "A" "data family" SkClass (R 1 0 1 11)]
, testSessionWait "data family instance " $ do
let source = T.unlines
[ "{-# language TypeFamilies #-}"
, "data family A a"
, "data instance A () = A ()"
]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[ docSymbolD "A a" "data family" SkClass (R 1 0 1 11)
, docSymbol "A ()" SkInterface (R 2 0 2 25)
]
, testSessionWait "constant" $ do
let source = T.unlines ["a = ()"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[docSymbol "a" SkFunction (R 0 0 0 6)]
, testSessionWait "pattern" $ do
let source = T.unlines ["Just foo = Just 21"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[docSymbol "Just foo" SkFunction (R 0 0 0 18)]
, testSessionWait "pattern with type signature" $ do
let source = T.unlines ["{-# language ScopedTypeVariables #-}", "a :: () = ()"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[docSymbol "a :: ()" SkFunction (R 1 0 1 12)]
, testSessionWait "function" $ do
let source = T.unlines ["a x = ()"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left [docSymbol "a" SkFunction (R 0 0 0 8)]
, testSessionWait "type synonym" $ do
let source = T.unlines ["type A = Bool"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[docSymbol' "A" SkTypeParameter (R 0 0 0 13) (R 0 5 0 6)]
, testSessionWait "datatype" $ do
let source = T.unlines ["data A = C"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[ docSymbolWithChildren "A"
SkStruct
(R 0 0 0 10)
[docSymbol "C" SkConstructor (R 0 9 0 10)]
]
, testSessionWait "record fields" $ do
let source = T.unlines ["data A = B {", " x :: Int", " , y :: Int}"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @=? Left
[ docSymbolWithChildren "A" SkStruct (R 0 0 2 13)
[ docSymbolWithChildren' "B" SkConstructor (R 0 9 2 13) (R 0 9 0 10)
[ docSymbol "x" SkField (R 1 2 1 3)
, docSymbol "y" SkField (R 2 4 2 5)
]
]
]
, testSessionWait "import" $ do
let source = T.unlines ["import Data.Maybe"]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[docSymbolWithChildren "imports"
SkModule
(R 0 0 0 17)
[ docSymbol "import Data.Maybe" SkModule (R 0 0 0 17)
]
]
, testSessionWait "multiple import" $ do
let source = T.unlines ["", "import Data.Maybe", "", "import Control.Exception", ""]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left
[docSymbolWithChildren "imports"
SkModule
(R 1 0 3 24)
[ docSymbol "import Data.Maybe" SkModule (R 1 0 1 17)
, docSymbol "import Control.Exception" SkModule (R 3 0 3 24)
]
]
, testSessionWait "foreign import" $ do
let source = T.unlines
[ "{-# language ForeignFunctionInterface #-}"
, "foreign import ccall \"a\" a :: Int"
]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left [docSymbolD "a" "import" SkObject (R 1 0 1 33)]
, testSessionWait "foreign export" $ do
let source = T.unlines
[ "{-# language ForeignFunctionInterface #-}"
, "foreign export ccall odd :: Int -> Bool"
]
docId <- createDoc "A.hs" "haskell" source
symbols <- getDocumentSymbols docId
liftIO $ symbols @?= Left [docSymbolD "odd" "export" SkObject (R 1 0 1 39)]
]
where
docSymbol name kind loc =
DocumentSymbol name Nothing kind Nothing loc loc Nothing
docSymbol' name kind loc selectionLoc =
DocumentSymbol name Nothing kind Nothing loc selectionLoc Nothing
docSymbolD name detail kind loc =
DocumentSymbol name (Just detail) kind Nothing loc loc Nothing
docSymbolWithChildren name kind loc cc =
DocumentSymbol name Nothing kind Nothing loc loc (Just $ List cc)
docSymbolWithChildren' name kind loc selectionLoc cc =
DocumentSymbol name Nothing kind Nothing loc selectionLoc (Just $ List cc)
moduleSymbol name loc cc = DocumentSymbol name
Nothing
SkFile
Nothing
(R 0 0 maxBound 0)
loc
(Just $ List cc)
classSymbol name loc cc = DocumentSymbol name
(Just "class")
SkClass
Nothing
loc
loc
(Just $ List cc)
pattern R :: Int -> Int -> Int -> Int -> Range
pattern R x y x' y' = Range (Position x y) (Position x' y')
xfail :: TestTree -> String -> TestTree
xfail = flip expectFailBecause
xfail8101 :: TestTree -> String -> TestTree
#if MIN_GHC_API_VERSION(8,10,0)
xfail8101 = flip expectFailBecause
#else
xfail8101 t _ = t
#endif
data Expect
= ExpectRange Range -- Both gotoDef and hover should report this range
| ExpectLocation Location
-- | ExpectDefRange Range -- Only gotoDef should report this range
| ExpectHoverRange Range -- Only hover should report this range
| ExpectHoverText [T.Text] -- the hover message must contain these snippets
| ExpectExternFail -- definition lookup in other file expected to fail
| ExpectNoDefinitions
| ExpectNoHover
-- | ExpectExtern -- TODO: as above, but expected to succeed: need some more info in here, once we have some working examples
deriving Eq
mkR :: Int -> Int -> Int -> Int -> Expect
mkR startLine startColumn endLine endColumn = ExpectRange $ mkRange startLine startColumn endLine endColumn
mkL :: Uri -> Int -> Int -> Int -> Int -> Expect
mkL uri startLine startColumn endLine endColumn = ExpectLocation $ Location uri $ mkRange startLine startColumn endLine endColumn
haddockTests :: TestTree
haddockTests
= testGroup "haddock"
[ testCase "Num" $ checkHaddock
(unlines
[ "However, '(+)' and '(*)' are"
, "customarily expected to define a ring and have the following properties:"
, ""
, "[__Associativity of (+)__]: @(x + y) + z@ = @x + (y + z)@"
, "[__Commutativity of (+)__]: @x + y@ = @y + x@"
, "[__@fromInteger 0@ is the additive identity__]: @x + fromInteger 0@ = @x@"
]
)
(unlines
[ ""
, ""
, "However, `(+)` and `(*)` are"
, "customarily expected to define a ring and have the following properties: "
, "+ ****Associativity of (+)****: `(x + y) + z` = `x + (y + z)`"
, "+ ****Commutativity of (+)****: `x + y` = `y + x`"
, "+ ****`fromInteger 0` is the additive identity****: `x + fromInteger 0` = `x`"
]
)
, testCase "unsafePerformIO" $ checkHaddock
(unlines
[ "may require"
, "different precautions:"
, ""
, " * Use @{\\-\\# NOINLINE foo \\#-\\}@ as a pragma on any function @foo@"
, " that calls 'unsafePerformIO'. If the call is inlined,"
, " the I\\/O may be performed more than once."
, ""
, " * Use the compiler flag @-fno-cse@ to prevent common sub-expression"
, " elimination being performed on the module."
, ""
]
)
(unlines
[ ""
, ""
, "may require"
, "different precautions: "
, "+ Use `{-# NOINLINE foo #-}` as a pragma on any function `foo` "
, " that calls `unsafePerformIO` . If the call is inlined,"
, " the I/O may be performed more than once."
, ""
, "+ Use the compiler flag `-fno-cse` to prevent common sub-expression"
, " elimination being performed on the module."
, ""
]
)
]
where
checkHaddock s txt = spanDocToMarkdownForTest s @?= txt
cradleTests :: TestTree
cradleTests = testGroup "cradle"
[testGroup "dependencies" [sessionDepsArePickedUp]
,testGroup "loading" [loadCradleOnlyonce]
,testGroup "multi" [simpleMultiTest, simpleMultiTest2]
]
loadCradleOnlyonce :: TestTree
loadCradleOnlyonce = testGroup "load cradle only once"
[ testSession' "implicit" implicit
, testSession' "direct" direct
]
where
direct dir = do
liftIO $ writeFileUTF8 (dir </> "hie.yaml")
"cradle: {direct: {arguments: []}}"
test dir
implicit dir = test dir
test _dir = do
doc <- createDoc "B.hs" "haskell" "module B where\nimport Data.Foo"
msgs <- someTill (skipManyTill anyMessage cradleLoadedMessage) (skipManyTill anyMessage (message @PublishDiagnosticsNotification))
liftIO $ length msgs @?= 1
changeDoc doc [TextDocumentContentChangeEvent Nothing Nothing "module B where\nimport Data.Maybe"]
msgs <- manyTill (skipManyTill anyMessage cradleLoadedMessage) (skipManyTill anyMessage (message @PublishDiagnosticsNotification))
liftIO $ length msgs @?= 0
_ <- createDoc "A.hs" "haskell" "module A where\nimport LoadCradleBar"
msgs <- manyTill (skipManyTill anyMessage cradleLoadedMessage) (skipManyTill anyMessage (message @PublishDiagnosticsNotification))
liftIO $ length msgs @?= 0
dependentFileTest :: TestTree
dependentFileTest = testGroup "addDependentFile"
[testGroup "file-changed" [testSession' "test" test]
]
where
test dir = do
-- If the file contains B then no type error
-- otherwise type error
liftIO $ writeFile (dir </> "dep-file.txt") "A"
let fooContent = T.unlines
[ "{-# LANGUAGE TemplateHaskell #-}"
, "module Foo where"
, "import Language.Haskell.TH.Syntax"
, "foo :: Int"
, "foo = 1 + $(do"
, " qAddDependentFile \"dep-file.txt\""
, " f <- qRunIO (readFile \"dep-file.txt\")"
, " if f == \"B\" then [| 1 |] else lift f)"
]
let bazContent = T.unlines ["module Baz where", "import Foo"]
_ <-createDoc "Foo.hs" "haskell" fooContent
doc <- createDoc "Baz.hs" "haskell" bazContent
expectDiagnostics
[("Foo.hs", [(DsError, (4, 6), "Couldn't match expected type")])]
-- Now modify the dependent file
liftIO $ writeFile (dir </> "dep-file.txt") "B"
let change = TextDocumentContentChangeEvent
{ _range = Just (Range (Position 2 0) (Position 2 6))
, _rangeLength = Nothing
, _text = "f = ()"
}
-- Modifying Baz will now trigger Foo to be rebuilt as well
changeDoc doc [change]
expectDiagnostics [("Foo.hs", [])]
cradleLoadedMessage :: Session FromServerMessage
cradleLoadedMessage = satisfy $ \case
NotCustomServer (NotificationMessage _ (CustomServerMethod m) _) -> m == cradleLoadedMethod
_ -> False
cradleLoadedMethod :: T.Text
cradleLoadedMethod = "ghcide/cradle/loaded"
-- Stack sets this which trips up cabal in the multi-component tests.
-- However, our plugin tests rely on those env vars so we unset it locally.
withoutStackEnv :: IO a -> IO a
withoutStackEnv s =
bracket
(mapM getEnv vars >>= \prevState -> mapM_ unsetEnv vars >> pure prevState)
(\prevState -> mapM_ (\(var, value) -> restore var value) (zip vars prevState))
(const s)
where vars =
[ "GHC_PACKAGE_PATH"
, "GHC_ENVIRONMENT"
, "HASKELL_DIST_DIR"
, "HASKELL_PACKAGE_SANDBOX"
, "HASKELL_PACKAGE_SANDBOXES"
]
restore var Nothing = unsetEnv var
restore var (Just val) = setEnv var val True
simpleMultiTest :: TestTree
simpleMultiTest = testCase "simple-multi-test" $ withoutStackEnv $ runWithExtraFiles "multi" $ \dir -> do
let aPath = dir </> "a/A.hs"
bPath = dir </> "b/B.hs"
aSource <- liftIO $ readFileUtf8 aPath
(TextDocumentIdentifier adoc) <- createDoc aPath "haskell" aSource
expectNoMoreDiagnostics 0.5
bSource <- liftIO $ readFileUtf8 bPath
bdoc <- createDoc bPath "haskell" bSource
expectNoMoreDiagnostics 0.5
locs <- getDefinitions bdoc (Position 2 7)
let fooL = mkL adoc 2 0 2 3
checkDefs locs (pure [fooL])
expectNoMoreDiagnostics 0.5
-- Like simpleMultiTest but open the files in the other order
simpleMultiTest2 :: TestTree
simpleMultiTest2 = testCase "simple-multi-test2" $ withoutStackEnv $ runWithExtraFiles "multi" $ \dir -> do
let aPath = dir </> "a/A.hs"
bPath = dir </> "b/B.hs"
bSource <- liftIO $ readFileUtf8 bPath
bdoc <- createDoc bPath "haskell" bSource
expectNoMoreDiagnostics 5
aSource <- liftIO $ readFileUtf8 aPath
(TextDocumentIdentifier adoc) <- createDoc aPath "haskell" aSource
-- Need to have some delay here or the test fails
expectNoMoreDiagnostics 5
locs <- getDefinitions bdoc (Position 2 7)
let fooL = mkL adoc 2 0 2 3
checkDefs locs (pure [fooL])
expectNoMoreDiagnostics 0.5
sessionDepsArePickedUp :: TestTree
sessionDepsArePickedUp = testSession'
"session-deps-are-picked-up"
$ \dir -> do
liftIO $
writeFileUTF8
(dir </> "hie.yaml")
"cradle: {direct: {arguments: []}}"
-- Open without OverloadedStrings and expect an error.
doc <- createDoc "Foo.hs" "haskell" fooContent
expectDiagnostics
[("Foo.hs", [(DsError, (3, 6), "Couldn't match expected type")])]
-- Update hie.yaml to enable OverloadedStrings.
liftIO $
writeFileUTF8
(dir </> "hie.yaml")
"cradle: {direct: {arguments: [-XOverloadedStrings]}}"
-- Send change event.
let change =
TextDocumentContentChangeEvent
{ _range = Just (Range (Position 4 0) (Position 4 0)),
_rangeLength = Nothing,
_text = "\n"
}
changeDoc doc [change]
-- Now no errors.
expectDiagnostics [("Foo.hs", [])]
where
fooContent =
T.unlines
[ "module Foo where",
"import Data.Text",
"foo :: Text",
"foo = \"hello\""
]
----------------------------------------------------------------------
-- Utils
testSession :: String -> Session () -> TestTree
testSession name = testCase name . run
testSessionWithExtraFiles :: FilePath -> String -> (FilePath -> Session ()) -> TestTree
testSessionWithExtraFiles prefix name = testCase name . runWithExtraFiles prefix
testSession' :: String -> (FilePath -> Session ()) -> TestTree
testSession' name = testCase name . run'
testSessionWait :: String -> Session () -> TestTree
testSessionWait name = testSession name .
-- Check that any diagnostics produced were already consumed by the test case.
--
-- If in future we add test cases where we don't care about checking the diagnostics,
-- this could move elsewhere.
--
-- Experimentally, 0.5s seems to be long enough to wait for any final diagnostics to appear.
( >> expectNoMoreDiagnostics 0.5)
pickActionWithTitle :: T.Text -> [CAResult] -> IO CodeAction
pickActionWithTitle title actions = do
assertBool ("Found no matching actions: " <> show titles) (not $ null matches)
return $ head matches
where
titles =
[ actionTitle
| CACodeAction CodeAction { _title = actionTitle } <- actions
]
matches =
[ action
| CACodeAction action@CodeAction { _title = actionTitle } <- actions
, title == actionTitle
]
mkRange :: Int -> Int -> Int -> Int -> Range
mkRange a b c d = Range (Position a b) (Position c d)
run :: Session a -> IO a
run s = withTempDir $ \dir -> runInDir dir s
runWithExtraFiles :: FilePath -> (FilePath -> Session a) -> IO a
runWithExtraFiles prefix s = withTempDir $ \dir -> do
copyTestDataFiles dir prefix
runInDir dir (s dir)
copyTestDataFiles :: FilePath -> FilePath -> IO ()
copyTestDataFiles dir prefix = do
-- Copy all the test data files to the temporary workspace
testDataFiles <- getDirectoryFilesIO ("test/data" </> prefix) ["//*"]
for_ testDataFiles $ \f -> do
createDirectoryIfMissing True $ dir </> takeDirectory f
copyFile ("test/data" </> prefix </> f) (dir </> f)
run' :: (FilePath -> Session a) -> IO a
run' s = withTempDir $ \dir -> runInDir dir (s dir)
runInDir :: FilePath -> Session a -> IO a
runInDir dir s = do
ghcideExe <- locateGhcideExecutable
-- Temporarily hack around https://github.com/mpickering/hie-bios/pull/56
-- since the package import test creates "Data/List.hs", which otherwise has no physical home
createDirectoryIfMissing True $ dir ++ "/Data"
let cmd = unwords [ghcideExe, "--lsp", "--test", "--cwd", dir]
-- HIE calls getXgdDirectory which assumes that HOME is set.
-- Only sets HOME if it wasn't already set.
setEnv "HOME" "/homeless-shelter" False
let lspTestCaps = fullCaps { _window = Just $ WindowClientCapabilities $ Just True }
runSessionWithConfig conf cmd lspTestCaps dir s
where
conf = defaultConfig
-- If you uncomment this you can see all logging
-- which can be quite useful for debugging.
-- { logStdErr = True, logColor = False }
-- If you really want to, you can also see all messages
-- { logMessages = True, logColor = False }
openTestDataDoc :: FilePath -> Session TextDocumentIdentifier
openTestDataDoc path = do
source <- liftIO $ readFileUtf8 $ "test/data" </> path
createDoc path "haskell" source
findCodeActions :: TextDocumentIdentifier -> Range -> [T.Text] -> Session [CodeAction]
findCodeActions doc range expectedTitles = do
actions <- getCodeActions doc range
let matches = sequence
[ listToMaybe
[ action
| CACodeAction action@CodeAction { _title = actionTitle } <- actions
, actionTitle == expectedTitle ]
| expectedTitle <- expectedTitles]
let msg = show
[ actionTitle
| CACodeAction CodeAction { _title = actionTitle } <- actions
]
++ " is not a superset of "
++ show expectedTitles
liftIO $ case matches of
Nothing -> assertFailure msg
Just _ -> pure ()
return (fromJust matches)
findCodeAction :: TextDocumentIdentifier -> Range -> T.Text -> Session CodeAction
findCodeAction doc range t = head <$> findCodeActions doc range [t]
unitTests :: TestTree
unitTests = do
testGroup "Unit"
[ testCase "empty file path does NOT work with the empty String literal" $
uriToFilePath' (fromNormalizedUri $ filePathToUri' "") @?= Just "."
, testCase "empty file path works using toNormalizedFilePath'" $
uriToFilePath' (fromNormalizedUri $ filePathToUri' (toNormalizedFilePath' "")) @?= Just ""
, testCase "empty path URI" $ do
Just URI{..} <- pure $ parseURI (T.unpack $ getUri $ fromNormalizedUri emptyPathUri)
uriScheme @?= "file:"
uriPath @?= ""
, testCase "from empty path URI" $ do
let uri = Uri "file://"
uriToFilePath' uri @?= Just ""
]
positionMappingTests :: TestTree
positionMappingTests =
testGroup "position mapping"
[ testGroup "toCurrent"
[ testCase "before" $
toCurrent
(Range (Position 0 1) (Position 0 3))
"ab"
(Position 0 0) @?= Just (Position 0 0)
, testCase "after, same line, same length" $
toCurrent
(Range (Position 0 1) (Position 0 3))
"ab"
(Position 0 3) @?= Just (Position 0 3)
, testCase "after, same line, increased length" $
toCurrent
(Range (Position 0 1) (Position 0 3))
"abc"
(Position 0 3) @?= Just (Position 0 4)
, testCase "after, same line, decreased length" $
toCurrent
(Range (Position 0 1) (Position 0 3))
"a"
(Position 0 3) @?= Just (Position 0 2)
, testCase "after, next line, no newline" $
toCurrent
(Range (Position 0 1) (Position 0 3))
"abc"
(Position 1 3) @?= Just (Position 1 3)
, testCase "after, next line, newline" $
toCurrent
(Range (Position 0 1) (Position 0 3))
"abc\ndef"
(Position 1 0) @?= Just (Position 2 0)
, testCase "after, same line, newline" $
toCurrent
(Range (Position 0 1) (Position 0 3))
"abc\nd"
(Position 0 4) @?= Just (Position 1 2)
, testCase "after, same line, newline + newline at end" $
toCurrent
(Range (Position 0 1) (Position 0 3))
"abc\nd\n"
(Position 0 4) @?= Just (Position 2 1)
, testCase "after, same line, newline + newline at end" $
toCurrent
(Range (Position 0 1) (Position 0 1))
"abc"
(Position 0 1) @?= Just (Position 0 4)
]
, testGroup "fromCurrent"
[ testCase "before" $
fromCurrent
(Range (Position 0 1) (Position 0 3))
"ab"
(Position 0 0) @?= Just (Position 0 0)
, testCase "after, same line, same length" $
fromCurrent
(Range (Position 0 1) (Position 0 3))
"ab"
(Position 0 3) @?= Just (Position 0 3)
, testCase "after, same line, increased length" $
fromCurrent
(Range (Position 0 1) (Position 0 3))
"abc"
(Position 0 4) @?= Just (Position 0 3)
, testCase "after, same line, decreased length" $
fromCurrent
(Range (Position 0 1) (Position 0 3))
"a"
(Position 0 2) @?= Just (Position 0 3)
, testCase "after, next line, no newline" $
fromCurrent
(Range (Position 0 1) (Position 0 3))
"abc"
(Position 1 3) @?= Just (Position 1 3)
, testCase "after, next line, newline" $
fromCurrent
(Range (Position 0 1) (Position 0 3))
"abc\ndef"
(Position 2 0) @?= Just (Position 1 0)
, testCase "after, same line, newline" $
fromCurrent
(Range (Position 0 1) (Position 0 3))
"abc\nd"
(Position 1 2) @?= Just (Position 0 4)
, testCase "after, same line, newline + newline at end" $
fromCurrent
(Range (Position 0 1) (Position 0 3))
"abc\nd\n"
(Position 2 1) @?= Just (Position 0 4)
, testCase "after, same line, newline + newline at end" $
fromCurrent
(Range (Position 0 1) (Position 0 1))
"abc"
(Position 0 4) @?= Just (Position 0 1)
]
, adjustOption (\(QuickCheckTests i) -> QuickCheckTests (max 1000 i)) $ testGroup "properties"
[ testProperty "fromCurrent r t <=< toCurrent r t" $ do
-- Note that it is important to use suchThatMap on all values at once
-- instead of only using it on the position. Otherwise you can get
-- into situations where there is no position that can be mapped back
-- for the edit which will result in QuickCheck looping forever.
let gen = do
rope <- genRope
range <- genRange rope
PrintableText replacement <- arbitrary
oldPos <- genPosition rope
pure (range, replacement, oldPos)
forAll
(suchThatMap gen
(\(range, replacement, oldPos) -> (range, replacement, oldPos,) <$> toCurrent range replacement oldPos)) $
\(range, replacement, oldPos, newPos) ->
fromCurrent range replacement newPos === Just oldPos
, testProperty "toCurrent r t <=< fromCurrent r t" $ do
let gen = do
rope <- genRope
range <- genRange rope
PrintableText replacement <- arbitrary
let newRope = applyChange rope (TextDocumentContentChangeEvent (Just range) Nothing replacement)
newPos <- genPosition newRope
pure (range, replacement, newPos)
forAll
(suchThatMap gen
(\(range, replacement, newPos) -> (range, replacement, newPos,) <$> fromCurrent range replacement newPos)) $
\(range, replacement, newPos, oldPos) ->
toCurrent range replacement oldPos === Just newPos
]
]
newtype PrintableText = PrintableText { getPrintableText :: T.Text }
deriving Show
instance Arbitrary PrintableText where
arbitrary = PrintableText . T.pack . getPrintableString <$> arbitrary
genRope :: Gen Rope
genRope = Rope.fromText . getPrintableText <$> arbitrary
genPosition :: Rope -> Gen Position
genPosition r = do
row <- choose (0, max 0 $ rows - 1)
let columns = Rope.columns (nthLine row r)
column <- choose (0, max 0 $ columns - 1)
pure $ Position row column
where rows = Rope.rows r
genRange :: Rope -> Gen Range
genRange r = do
startPos@(Position startLine startColumn) <- genPosition r
let maxLineDiff = max 0 $ rows - 1 - startLine
endLine <- choose (startLine, startLine + maxLineDiff)
let columns = Rope.columns (nthLine endLine r)
endColumn <-
if startLine == endLine
then choose (startColumn, columns)
else choose (0, max 0 $ columns - 1)
pure $ Range startPos (Position endLine endColumn)
where rows = Rope.rows r
-- | Get the ith line of a rope, starting from 0. Trailing newline not included.
nthLine :: Int -> Rope -> Rope
nthLine i r
| i < 0 = error $ "Negative line number: " <> show i
| i == 0 && Rope.rows r == 0 = r
| i >= Rope.rows r = error $ "Row number out of bounds: " <> show i <> "/" <> show (Rope.rows r)
| otherwise = Rope.takeWhile (/= '\n') $ fst $ Rope.splitAtLine 1 $ snd $ Rope.splitAtLine (i - 1) r
getWatchedFilesSubscriptionsUntil :: forall end . (FromJSON end, Typeable end) => Session [Maybe Value]
getWatchedFilesSubscriptionsUntil = do
msgs <- manyTill (Just <$> message @RegisterCapabilityRequest <|> Nothing <$ anyMessage) (message @end)
return
[ args
| Just RequestMessage{_params = RegistrationParams (List regs)} <- msgs
, Registration _id WorkspaceDidChangeWatchedFiles args <- regs
]