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|
{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
module Main
( main
) where
import Control.Applicative
#if MIN_VERSION_base(4,7,0)
import Data.Either
#endif
#if __GLASGOW_HASKELL__ < 710
import Data.Monoid
#endif
import qualified Test.QuickCheck as Q
import Text.Parser.Char
import Text.Parser.Combinators
import Text.Trifecta.Parser
import Text.Trifecta.Result
import System.Exit
-- -------------------------------------------------------------------------- --
-- Main
main :: IO ()
main = mapM Q.quickCheckResult tests >>= \x -> case filter (not . passed) x of
[] -> exitSuccess
_ -> exitFailure
where
passed Q.Success{} = True
passed _ = False
-- -------------------------------------------------------------------------- --
-- Tests
tests :: [Q.Property]
tests =
[ Q.property prop_fail
, Q.property prop_succeed
, Q.property prop_notFollowedBy0
, Q.property prop_notFollowedBy1
, Q.property prop_notFollowedBy2
, Q.property prop_notFollowedBy3
]
-- -------------------------------------------------------------------------- --
-- Properties
prop_fail :: String -> Bool
prop_fail = isLeft . parse (fail "fail" :: Parser ())
prop_succeed :: String -> Bool
prop_succeed = isRight . parse (mempty :: Parser ())
prop_notFollowedBy0 :: Char -> Char -> Bool
prop_notFollowedBy0 x y = either (\_ -> x == y) (/= y)
$ parse (notFollowedBy (char y) *> anyChar) [x]
prop_notFollowedBy1 :: Char -> Bool
prop_notFollowedBy1 x = either (\_ -> x == x) (/= x)
$ parse (notFollowedBy (char x) *> anyChar) [x]
prop_notFollowedBy2 :: String -> Char -> Bool
prop_notFollowedBy2 x y = isLeft
$ parse (anyChar *> notFollowedBy (char y) *> char y) x
prop_notFollowedBy3 :: Char -> Bool
prop_notFollowedBy3 x = isRight
$ parse (notFollowedBy (char x) <|> char x *> pure ()) [x]
-- -------------------------------------------------------------------------- --
-- Utils
parse :: Parser a -> String -> Either String a
parse p s = case parseString p mempty s of
Failure e -> Left (show e)
Success a -> Right a
#if !MIN_VERSION_base(4,7,0)
isLeft :: Either a b -> Bool
isLeft = either (const True) (const False)
isRight :: Either a b -> Bool
isRight = either (const False) (const True)
#endif
|
