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{-# LANGUAGE FlexibleInstances #-}
{-# OPTIONS_GHC -fno-warn-orphans #-}
import Control.Applicative ((<$>), (<*>))
import Functions (rechunk)
import Test.Framework (defaultMain)
import Test.Framework.Providers.QuickCheck2 (testProperty)
import Test.QuickCheck (Arbitrary(..))
import qualified Codec.Compression.Snappy as B
import qualified Codec.Compression.Snappy.Lazy as L
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as L
instance Arbitrary B.ByteString where
arbitrary = B.pack <$> arbitrary
instance Arbitrary L.ByteString where
arbitrary = smallChunk <$> arbitrary <*> arbitrary
s_roundtrip bs = B.decompress (B.compress bs) == bs
newtype Compressed a = Compressed { compressed :: a }
deriving (Eq, Ord)
instance Show a => Show (Compressed a)
where show (Compressed a) = "Compressed " ++ show a
instance Arbitrary (Compressed B.ByteString) where
arbitrary = (Compressed . B.compress) <$> arbitrary
compress_eq n bs = L.fromChunks [B.compress bs] == L.compress (smallChunk n bs)
decompress_eq n (Compressed bs) =
L.fromChunks [B.decompress bs] == L.decompress (smallChunk n bs)
t_rechunk n bs = L.fromChunks [bs] == smallChunk n bs
l_roundtrip bs = L.decompress (L.compress bs) == bs
smallChunk n = rechunk ((n `mod` 63) + 1)
main = defaultMain tests
tests = [
testProperty "s_roundtrip" s_roundtrip
, testProperty "t_rechunk" t_rechunk
, testProperty "compress_eq" compress_eq
, testProperty "decompress_eq" decompress_eq
, testProperty "l_roundtrip" l_roundtrip
]
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