{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE MonadComprehensions #-}
{-# LANGUAGE ScopedTypeVariables #-}
import Data.Coerce (coerce)
import Data.List (groupBy)
import qualified Data.Maybe
import qualified Data.Semigroup as Semigroup
import qualified Data.Text as Text
import qualified Data.Text.IO as Text.IO
import qualified GHC.OldList as List
import qualified Data.Map.Strict as Map
import Data.These
import Language.Haskell.Brittany.Internal
import Language.Haskell.Brittany.Internal.Config
import Language.Haskell.Brittany.Internal.Config.Types
import Language.Haskell.Brittany.Internal.Prelude
import Language.Haskell.Brittany.Internal.PreludeUtils
import qualified System.Directory
import System.FilePath ((</>))
import System.Timeout (timeout)
import Test.Hspec
import qualified Text.Parsec as Parsec
import Text.Parsec.Text (Parser)
hush :: Either a b -> Maybe b
hush = either (const Nothing) Just
asymptoticPerfTest :: Spec
asymptoticPerfTest = do
it "10 do statements"
$ roundTripEqualWithTimeout 1500000
$ (Text.pack "func = do\n")
<> Text.replicate 10 (Text.pack " statement\n")
it "10 do nestings"
$ roundTripEqualWithTimeout 4000000
$ (Text.pack "func = ")
<> mconcat
( [1 .. 10]
<&> \(i :: Int) ->
(Text.replicate (2 * i) (Text.pack " ") <> Text.pack "do\n")
)
<> Text.replicate 2000 (Text.pack " ")
<> Text.pack "return\n"
<> Text.replicate 2002 (Text.pack " ")
<> Text.pack "()"
it "10 AppOps"
$ roundTripEqualWithTimeout 1000000
$ (Text.pack "func = expr")
<> Text.replicate 10 (Text.pack "\n . expr") --TODO
roundTripEqualWithTimeout :: Int -> Text -> Expectation
roundTripEqualWithTimeout time t =
timeout time (action >>= evaluate) >>= (`shouldSatisfy`Data.Maybe.isJust)
where
action = fmap (fmap PPTextWrapper)
(parsePrintModuleTests defaultTestConfig "TestFakeFileName.hs" t)
data InputLine
= GroupLine Text
| HeaderLine Text
| PendingLine
| NormalLine Text
| CommentLine
deriving Show
data TestCase = TestCase
{ testName :: Text
, isPending :: Bool
, content :: Text
}
main :: IO ()
main = do
let
getFiles :: FilePath -> IO [FilePath]
getFiles path = do
candidates <- System.Directory.listDirectory path
fmap join
$ sequence
$ [ do
isDir <- System.Directory.doesDirectoryExist (path </> c)
if
| isDir -> getFiles (path </> c)
| ".blt" `isSuffixOf` c -> pure [path </> c]
| otherwise -> pure []
| c <- candidates
]
blts <- getFiles "data/"
inputs <- sequence
[ Text.IO.readFile (blt)
| blt <- blts
, not ("tests-context-free.blt" `isSuffixOf` blt)
]
let groups = createChunks =<< inputs
inputCtxFree <- sequence
[ Text.IO.readFile (blt)
| blt <- blts
, "tests-context-free.blt" `isSuffixOf` blt
]
let groupsCtxFree = createChunks =<< inputCtxFree
hspec $ do
describe "asymptotic perf roundtrips" $ asymptoticPerfTest
describe "library interface basic functionality" $ do
it "gives properly formatted result for valid input" $ do
let
input = Text.pack $ unlines
["func = [00000000000000000000000, 00000000000000000000000, 00000000000000000000000, 00000000000000000000000]"]
let expected = Text.pack $ unlines
[ "func ="
, " [ 00000000000000000000000"
, " , 00000000000000000000000"
, " , 00000000000000000000000"
, " , 00000000000000000000000"
, " ]"
]
output <- liftIO $ parsePrintModule
(TraceFunc $ \_ -> pure ())
staticDefaultConfig
input
hush output `shouldBe` Just expected
let
runWithConfig grps conf = do
-- This is a quick-and-dirty solution for merging groups, because hspec
-- isn't clever enough to merge "describe foo (item x); describe (item y)"
-- into "describe foo (item; item y)".
-- This is a messy solution that works for the first two layers only.
-- TODO: Ideally we'd have some proper data-structure to represent
-- something similar in shape to a nested directory/file structure.
-- e.g. data Dir a = Map String (Either (Dir a) a)
let groupTree = Map.unionsWith (Map.unionWith $ Map.unionWith (++)) [ case splitGroups of
(a:b:rs) -> Map.singleton a (Map.singleton (Just b) $ Map.singleton rs tests)
[a] -> Map.singleton a (Map.singleton Nothing (Map.singleton [] tests))
[] -> error "empty test group name, should not happen"
| (groupname, tests) <- grps, let splitGroups = Text.splitOn (Text.pack "/") groupname]
Map.toList groupTree `forM_` \(k, m2) ->
describe (Text.unpack k) $ Map.toList m2 `forM_` \(k2, m3) ->
(case k2 of
Nothing -> id
Just grp -> describe (Text.unpack grp))
(Map.toList m3 `forM_` \(ks, tests) ->
foldr
(\grp -> describe (Text.unpack grp))
(tests `forM_` \test -> do
(if isPending test then before_ pending else id)
$ it (Text.unpack $ testName test)
$ roundTripEqual conf
$ content test
)
ks
)
runWithConfig groups defaultTestConfig
runWithConfig groupsCtxFree contextFreeTestConfig
where
-- this function might be implemented in a weirdly complex fashion; the
-- reason being that it was copied from a somewhat more complex variant.
createChunks :: Text -> [(Text, [TestCase])]
createChunks input =
-- fmap (\case
-- HeaderLine n:PendingLine:rest | Just rlines <- mapM extractNormal rest -> (n, True, Text.unlines rlines)
-- HeaderLine n:rest | Just rlines <- mapM extractNormal rest -> (n, False, Text.unlines rlines)
-- l -> error $ "first non-empty line must start with #test footest\n" ++ show l
-- )
-- $ fmap (groupBy grouperT)
fmap groupProcessor
$ groupBy grouperG
$ filter (not . lineIsSpace)
$ lineMapper
<$> Text.lines input
where
groupProcessor :: [InputLine] -> (Text, [TestCase])
groupProcessor = \case
GroupLine g : grouprest ->
(,) g
$ fmap testProcessor
$ groupBy grouperT
$ filter (not . lineIsSpace)
$ grouprest
l -> error $ "first non-empty line must be a #group\n" ++ show l
testProcessor :: [InputLine] -> TestCase
testProcessor = \case
HeaderLine n : rest ->
let normalLines = Data.Maybe.mapMaybe extractNormal rest
in TestCase
{ testName = n
, isPending = any isPendingLine rest
, content = Text.unlines normalLines
}
l ->
error $ "first non-empty line must start with #test footest\n" ++ show l
extractNormal (NormalLine l) = Just l
extractNormal _ = Nothing
isPendingLine PendingLine{} = True
isPendingLine _ = False
specialLineParser :: Parser InputLine
specialLineParser = Parsec.choice
[ [ GroupLine $ Text.pack name
| _ <- Parsec.try $ Parsec.string "#group"
, _ <- Parsec.many1 $ Parsec.oneOf " \t"
, name <- Parsec.many1 $ Parsec.noneOf "\r\n:"
, _ <- Parsec.eof
]
, [ HeaderLine $ Text.pack name
| _ <- Parsec.try $ Parsec.string "#test"
, _ <- Parsec.many1 $ Parsec.oneOf " \t"
, name <- Parsec.many1 $ Parsec.noneOf "\r\n:"
, _ <- Parsec.eof
]
, [ PendingLine
| _ <- Parsec.try $ Parsec.string "#pending"
, _ <- Parsec.optional $ many (Parsec.noneOf "\r\n")
, _ <- Parsec.eof
]
, [ CommentLine
| _ <- Parsec.many $ Parsec.oneOf " \t"
, _ <- Parsec.optional $ Parsec.string "##" <* many
(Parsec.noneOf "\r\n")
, _ <- Parsec.eof
]
, [ NormalLine mempty
| _ <- Parsec.try $ Parsec.string "<BLANKLINE>"
, _ <- Parsec.eof
]
]
lineMapper :: Text -> InputLine
lineMapper line = case Parsec.runParser specialLineParser () "" line of
Left _e -> NormalLine line
Right l -> l
lineIsSpace :: InputLine -> Bool
lineIsSpace CommentLine = True
lineIsSpace _ = False
grouperG :: InputLine -> InputLine -> Bool
grouperG _ GroupLine{} = False
grouperG _ _ = True
grouperT :: InputLine -> InputLine -> Bool
grouperT _ HeaderLine{} = False
grouperT _ _ = True
--------------------
-- past this line: copy-pasta from other test (meh..)
--------------------
roundTripEqual :: Config -> Text -> Expectation
roundTripEqual c t =
fmap (fmap PPTextWrapper) (parsePrintModuleTests c "TestFakeFileName.hs" t)
`shouldReturn` Right (PPTextWrapper t)
newtype PPTextWrapper = PPTextWrapper Text
deriving Eq
instance Show PPTextWrapper where
show (PPTextWrapper t) = "\n" ++ Text.unpack t
-- brittany-next-binding --columns 160
-- brittany-next-binding { lconfig_indentPolicy: IndentPolicyLeft }
defaultTestConfig :: Config
defaultTestConfig = Config
{ _conf_version = _conf_version staticDefaultConfig
, _conf_debug = _conf_debug staticDefaultConfig
, _conf_layout = LayoutConfig
{ _lconfig_cols = coerce (80 :: Int)
, _lconfig_indentPolicy = coerce IndentPolicyFree
, _lconfig_indentAmount = coerce (2 :: Int)
, _lconfig_indentWhereSpecial = coerce True
, _lconfig_indentListSpecial = coerce True
, _lconfig_importColumn = coerce (60 :: Int)
, _lconfig_importAsColumn = coerce (60 :: Int)
, _lconfig_altChooser = coerce $ AltChooserBoundedSearch 3
, _lconfig_columnAlignMode = coerce (ColumnAlignModeMajority 0.7)
, _lconfig_alignmentLimit = coerce (30 :: Int)
, _lconfig_alignmentBreakOnMultiline = coerce True
, _lconfig_hangingTypeSignature = coerce False
, _lconfig_reformatModulePreamble = coerce True
, _lconfig_allowSingleLineExportList = coerce True
, _lconfig_allowHangingQuasiQuotes = coerce True
, _lconfig_experimentalSemicolonNewlines = coerce False
-- , _lconfig_allowSinglelineRecord = coerce False
}
, _conf_errorHandling = (_conf_errorHandling staticDefaultConfig) { _econf_omit_output_valid_check = coerce True }
, _conf_preprocessor = _conf_preprocessor staticDefaultConfig
, _conf_forward = ForwardOptions { _options_ghc = Identity [] }
, _conf_roundtrip_exactprint_only = coerce False
, _conf_disable_formatting = coerce False
, _conf_obfuscate = coerce False
}
contextFreeTestConfig :: Config
contextFreeTestConfig = defaultTestConfig
{ _conf_layout = (_conf_layout defaultTestConfig)
{ _lconfig_indentPolicy = coerce IndentPolicyLeft
, _lconfig_alignmentLimit = coerce (1 :: Int)
, _lconfig_columnAlignMode = coerce ColumnAlignModeDisabled
}
}