{-# OPTIONS_GHC -fno-warn-orphans #-}
{-# LANGUAGE CPP #-}
#if MIN_VERSION_base(4,9,0)
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE UndecidableInstances #-}
#endif
module Data.GenValidity.Text where
import Data.GenValidity
import Data.Validity.Text ()
import System.Random as Random
import Test.QuickCheck
import Test.QuickCheck.Gen
import Test.QuickCheck.Random
#if !MIN_VERSION_base(4,8,0)
import Control.Applicative ((<*>), pure)
import Data.Functor ((<$>))
#endif
import qualified Data.Text as ST
import qualified Data.Text.Internal.Lazy as LT
import qualified Data.Text.Lazy as LT
#if MIN_VERSION_base(4,9,0)
import GHC.TypeLits
#endif
instance GenValid ST.Text where
genValid = genText
shrinkValid = fmap ST.pack . shrinkValid . ST.unpack
#if MIN_VERSION_base(4,9,0)
instance GHC.TypeLits.TypeError ('GHC.TypeLits.Text "The GenUnchecked Data.Text.Text is disabled:" 'GHC.TypeLits.:$$: 'GHC.TypeLits.Text "Do not instantiate GenUnchecked, instantiate GenValid instead") =>
GenUnchecked ST.Text where
genUnchecked = error "unreachable"
shrinkUnchecked = error "unreachable"
#endif
genText :: Gen ST.Text
genText = do
len <- genListLength
MkGen $ \qcgen _ -> ST.unfoldrN len (pure . random) qcgen
genTextBy :: Gen Char -> Gen ST.Text
genTextBy (MkGen charFunc) = do
len <- genListLength
MkGen $ \qcgen size ->
let go :: QCGen -> Maybe (Char, QCGen)
go qcg =
let (qc1, qc2) = Random.split qcg
in Just (charFunc qc1 size, qc2)
in ST.unfoldrN len go qcgen
instance GenValid LT.Text where
genValid =
sized $ \n ->
case n of
0 -> pure LT.Empty
_ -> do
(a, b) <- genSplit n
st <- ST.cons <$> genValid <*> resize a genValid
lt <- resize b genValid
pure $ LT.Chunk st lt
shrinkValid = fmap LT.fromChunks . shrinkValid . LT.toChunks
#if MIN_VERSION_base(4,9,0)
instance GHC.TypeLits.TypeError ('GHC.TypeLits.Text "The GenUnchecked Data.Text.Lazy.Text is disabled:" 'GHC.TypeLits.:$$: 'GHC.TypeLits.Text "Do not instantiate GenUnchecked, instantiate GenValid instead") =>
GenUnchecked LT.Text where
genUnchecked = error "unreachable"
shrinkUnchecked = error "unreachable"
#endif
textStartingWith :: Char -> Gen ST.Text
textStartingWith c =
sized $ \n ->
case n of
0 -> pure $ ST.singleton c
1 -> pure $ ST.singleton c
_ -> ST.cons c <$> resize (n - 1) genValid
textWith :: Gen ST.Text -> Gen ST.Text
textWith gen =
sized $ \n -> do
(b, m, a) <- genSplit3 n
before <- resize b genValid
middle <- resize m gen
after <- resize a genValid
return $ ST.concat [before, middle, after]
textWithA :: Char -> Gen ST.Text
textWithA c = textWith $ ST.singleton <$> pure c
textWithoutAny :: Char -> Gen ST.Text
textWithoutAny c = textWithoutAnyOf [c]
textWithoutAnyOf :: String -> Gen ST.Text
textWithoutAnyOf cs = ST.pack <$> genListOf (genValid `suchThat` (`notElem` cs))
textAllCaps :: Gen ST.Text
textAllCaps = ST.toUpper <$> genValid