{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE UndecidableInstances #-}
{-# LANGUAGE OverloadedStrings #-}
module Data.Conduit.ZlibSpec (spec) where
import Test.Hspec
import Test.Hspec.QuickCheck (prop)
import qualified Data.Conduit as C
import qualified Data.Conduit.List as CL
import qualified Data.Conduit.Zlib as CZ
import Control.Monad.ST (runST)
import Data.Monoid
import qualified Data.ByteString as S
import qualified Data.ByteString.Lazy as L
import Data.ByteString.Char8 ()
import Data.ByteString.Lazy.Char8 ()
import Control.Monad.Trans.Resource (runExceptionT_)
import Control.Monad.Trans.Class
import Control.Monad.Catch.Pure
import Control.Monad.Base
import Control.Monad (replicateM_)
instance MonadBase base m => MonadBase base (CatchT m) where
liftBase = lift . liftBase
spec :: Spec
spec = describe "Data.Conduit.Zlib" $ do
prop "idempotent" $ \bss' -> runST $ do
let bss = map S.pack bss'
lbs = L.fromChunks bss
src = mconcat $ map (CL.sourceList . return) bss
outBss <- runExceptionT_ $ src C.$= CZ.gzip C.$= CZ.ungzip C.$$ CL.consume
return $ lbs == L.fromChunks outBss
prop "flush" $ \bss' -> do
let bss = map S.pack $ filter (not . null) bss'
bssC = concatMap (\bs -> [C.Chunk bs, C.Flush]) bss
src = mconcat $ map (CL.sourceList . return) bssC
outBssC <- src C.$= CZ.compressFlush 5 (CZ.WindowBits 31)
C.$= CZ.decompressFlush (CZ.WindowBits 31)
C.$$ CL.consume
outBssC `shouldBe` bssC
it "compressFlush large data" $ do
let content = L.pack $ map (fromIntegral . fromEnum) $ concat $ ["BEGIN"] ++ map show [1..100000 :: Int] ++ ["END"]
src = CL.sourceList $ map C.Chunk $ L.toChunks content
bssC <- src C.$$ CZ.compressFlush 5 (CZ.WindowBits 31) C.=$ CL.consume
let unChunk (C.Chunk x) = [x]
unChunk C.Flush = []
bss <- CL.sourceList bssC C.$$ CL.concatMap unChunk C.=$ CZ.ungzip C.=$ CL.consume
L.fromChunks bss `shouldBe` content
it "uncompressed after compressed" $ do
let c = "This data is stored compressed."
u = "This data isn't."
let src1 = do
C.yield c C.$= CZ.gzip
C.yield u
encoded <- src1 C.$$ CL.consume
let src2 = mapM_ C.yield encoded
(c', u') <- src2 C.$$ do
c' <- CZ.ungzip C.=$ CL.consume
u' <- CL.consume
return (S.concat c', S.concat u')
c' `shouldBe` c
u' `shouldBe` u
it "multiple compressed values" $ do
let s1 = "hello"
s2 = "world"
src = do
C.yield s1 C.$= CZ.gzip
C.yield s2 C.$= CZ.gzip
actual <- src C.$$ CZ.multiple CZ.ungzip C.=$ CL.consume
S.concat actual `shouldBe` S.concat [s1, s2]
it "single compressed, multiple uncompressed chunks" $ do
let s1 = "hello"
s2 = "there"
s3 = "world"
s1Z <- fmap S.concat $ C.yield s1 C.$= CZ.gzip C.$$ CL.consume
let src = do
C.yield $ S.append s1Z s2
C.yield s3
actual <- src C.$$ do
x <- fmap S.concat $ CZ.ungzip C.=$ CL.consume
y <- CL.consume
return (x, y)
actual `shouldBe` (s1, [s2, s3])
it "multiple, over 32k" $ do
let str = "One line"
cnt = 30000
src = replicateM_ cnt $ C.yield str C.$= CZ.gzip
actual <- fmap S.concat $ src C.$$ CZ.multiple CZ.ungzip C.=$ CL.consume
let expected = S.concat (replicate cnt str)
S.length actual `shouldBe` S.length expected
actual `shouldBe` expected