{-# LANGUAGE TupleSections #-}

-- | Contains definitions for generating 'Charset's.
module Network.HTTP.Media.Charset.Gen
  ( anything,
    genCharset,
    genConcreteCharset,
    genDiffCharset,
    genDiffConcreteCharsets,
  )
where

import Network.HTTP.Media.Charset.Internal
import Network.HTTP.Media.Gen (genDiffWith, genToken)
import Test.QuickCheck.Gen

-- | The Charset that matches anything.
anything :: Charset
anything = Charset "*"

-- | Generates any kind of Charset.
genCharset :: Gen Charset
genCharset = Charset <$> genToken

-- | Generates an Charset that does not match everything.
genConcreteCharset :: Gen Charset
genConcreteCharset = genDiffWith genCharset anything

-- | Generates a different Charset to the given one.
genDiffCharset :: Charset -> Gen Charset
genDiffCharset = genDiffWith genCharset

-- | Generates two different concrete Charsets.
genDiffConcreteCharsets :: Gen (Charset, Charset)
genDiffConcreteCharsets = do
  enc <- genConcreteCharset
  (enc,) <$> genDiffWith genConcreteCharset enc