module Bytea (testBytea) where

import Common
import qualified Data.ByteString as B

testBytea :: TestEnv -> Test
testBytea TestEnv{..} = TestList
    [ testStr "empty"                  []
    , testStr "\"hello\""              $ map (fromIntegral . fromEnum) ("hello" :: String)
    , testStr "ascending"              [0..255]
    , testStr "descending"             [255,254..0]
    , testStr "ascending, doubled up"  $ doubleUp [0..255]
    , testStr "descending, doubled up" $ doubleUp [255,254..0]
    ]
  where
    testStr label bytes = TestLabel label $ TestCase $ do
        let bs = B.pack bytes

        [Only h] <- query conn "SELECT md5(?::bytea)" [Binary bs]
        assertBool "Haskell -> SQL conversion altered the string" $ md5 bs == h

        [Only (Binary r)] <- query conn "SELECT ?::bytea" [Binary bs]
        assertBool "SQL -> Haskell conversion altered the string" $ bs == r

    doubleUp = concatMap (\x -> [x, x])