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{-# LANGUAGE DeriveGeneric #-}
module Main (main) where
import Control.Applicative
import qualified Data.ByteString as B
import qualified Data.ByteString.Lazy as L
import Test.Framework (defaultMain)
import Test.Framework.Providers.QuickCheck2 (testProperty)
import Test.QuickCheck
import GHC.Generics
import Data.BEncode
instance Arbitrary B.ByteString where
arbitrary = fmap B.pack arbitrary
instance Arbitrary BEncode where
arbitrary = frequency
[ (50, BInteger <$> arbitrary)
, (40, BString <$> arbitrary)
, (5, BList <$> (arbitrary `suchThat` ((10 >) . length)))
]
prop_EncDec :: BEncode -> Bool
prop_EncDec x = case decode (L.toStrict (encode x)) of
Left _ -> False
Right x' -> x == x'
data List a = Cons a (List a) | Nil
deriving (Show, Eq, Generic)
instance BEncodable a => BEncodable (List a)
instance Arbitrary a => Arbitrary (List a) where
arbitrary = frequency
[ (90, pure Nil)
, (10, Cons <$> arbitrary <*> arbitrary)
]
data T a = T
prop_bencodable :: Eq a => BEncodable a => T a -> a -> Bool
prop_bencodable _ x = decoded (L.toStrict (encoded x)) == Right x
main :: IO ()
main = defaultMain
[ testProperty "encode >>> decode = id" prop_EncDec
, testProperty "generic encode >>> decode = id" $
prop_bencodable (T :: T (List Int))
]
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