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  • module Spec where
    
    import Hedgehog (
        forAll,
        property,
        tripping,
     )
    
    import qualified Data.Binary as Binary
    import Data.Binary.Get (ByteOffset)
    import qualified Data.ByteString.Lazy as LB
    import Generators (shareHashChains, shares)
    import System.IO (hSetEncoding, stderr, stdout, utf8)
    import Test.Tasty (TestTree, defaultMain, testGroup)
    import Test.Tasty.Hedgehog (testProperty)
    
    tests :: TestTree
    tests =
        testGroup
            "SSK"
            [ testProperty "Hash chain round-trips through bytes" $
                property $ do
                    hashChain <- forAll shareHashChains
                    tripping hashChain Binary.encode decode'
            , testProperty "Share round-trips through bytes" $
                property $ do
                    share <- forAll shares
                    tripping share Binary.encode decode'
            ]
      where
        decode' :: Binary.Binary b => LB.ByteString -> Either (LB.ByteString, ByteOffset, String) b
        decode' = ((\(_, _, a) -> a) <$>) . Binary.decodeOrFail
    
    main :: IO ()
    main = do
        -- Hedgehog writes some non-ASCII and the whole test process will die if
        -- it can't be encoded.  Increase the chances that all of the output can
        -- be encoded by forcing the use of UTF-8 (overriding the LANG-based
        -- choice normally made).
        hSetEncoding stdout utf8
        hSetEncoding stderr utf8
        defaultMain tests