{-# LANGUAGE TemplateHaskell #-}
-- Copyright: (c) Magnus Therning, 2013
-- License: BSD3, found in the LICENSE file

module Codec.Binary.Base32Test where

import Codec.TestUtils
import qualified Codec.Binary.Base32 as B32

import qualified Data.ByteString as BS
import qualified Data.ByteString.Char8 as BSC
import Data.Word (Word8)

import Test.Tasty
import Test.Tasty.TH
import Test.Tasty.HUnit
import Test.Tasty.QuickCheck

case_enc_foobar :: IO ()
case_enc_foobar = do
    BSC.empty                   @=? B32.encode BSC.empty
    BSC.pack "MY======"         @=? B32.encode (BSC.pack "f")
    BSC.pack "MZXQ===="         @=? B32.encode (BSC.pack "fo")
    BSC.pack "MZXW6==="         @=? B32.encode (BSC.pack "foo")
    BSC.pack "MZXW6YQ="         @=? B32.encode (BSC.pack "foob")
    BSC.pack "MZXW6YTB"         @=? B32.encode (BSC.pack "fooba")
    BSC.pack "MZXW6YTBOI======" @=? B32.encode (BSC.pack "foobar")

case_dec_foobar :: IO ()
case_dec_foobar = do
    Right BS.empty            @=? B32.decode BS.empty
    Right (BSC.pack "f")      @=? B32.decode (BSC.pack "MY======")
    Right (BSC.pack "fo")     @=? B32.decode (BSC.pack "MZXQ====")
    Right (BSC.pack "foo")    @=? B32.decode (BSC.pack "MZXW6===")
    Right (BSC.pack "foob")   @=? B32.decode (BSC.pack "MZXW6YQ=")
    Right (BSC.pack "fooba")  @=? B32.decode (BSC.pack "MZXW6YTB")
    Right (BSC.pack "foobar") @=? B32.decode (BSC.pack "MZXW6YTBOI======")

case_dec_failures :: IO ()
case_dec_failures = do
    -- illegal char
    Left (BSC.empty, BSC.pack "M=XW6YTB") @=? B32.b32DecodePart (BSC.pack "M=XW6YTB")
    -- full block
    Nothing @=? B32.b32DecodeFinal (BSC.pack "MZXW6YTB")
    -- too short
    Nothing @=? B32.b32DecodeFinal (BSC.pack "MZXW6Y=")

prop_encdec :: [Word8] -> Bool
prop_encdec ws = BS.pack ws == fromRight (B32.decode $ B32.encode $ BS.pack ws)

tests :: TestTree
tests = $(testGroupGenerator)