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{-# LANGUAGE ViewPatterns #-}
import Func
import Test.QuickCheck
import Test.QuickCheck.Function
functorIdentity :: (Functor f, Eq (f a)) => f a -> Bool
functorIdentity f = fmap id f == f
functorCompose :: (Eq (f c), Functor f) =>
(a -> b)
-> (b -> c)
-> f a
-> Bool
functorCompose f g x =
(fmap g (fmap f x)) == (fmap (g . f) x)
functorCompose' :: (Eq (f c), Functor f) =>
f a
-> Fun a b
-> Fun b c
-> Bool
functorCompose' x (Fun _ f) (Fun _ g) =
(fmap (g . f) x) == (fmap g . fmap f $ x)
main :: IO ()
main = do
quickCheck (functorIdentity :: Identity Int -> Bool)
quickCheck ((functorCompose (+1) (*2)) :: Identity Int -> Bool)
quickCheck (functorCompose' :: Identity Int -> Fun Int Int -> Fun Int Int -> Bool)
quickCheck (functorIdentity :: Pair Int -> Bool)
quickCheck ((functorCompose (+1) (*2)) :: Pair Int -> Bool)
quickCheck (functorCompose' :: Pair Int -> Fun Int Int -> Fun Int Int -> Bool)
quickCheck (functorIdentity :: Two Int Int -> Bool)
quickCheck ((functorCompose (+1) (*2)) :: Two Int Int -> Bool)
quickCheck (functorCompose' :: Two Int Int -> Fun Int Int -> Fun Int Int -> Bool)
quickCheck (functorIdentity :: Three Int Int Int -> Bool)
quickCheck ((functorCompose (+1) (*2)) :: Three Int Int Int -> Bool)
quickCheck (functorCompose' :: Three Int Int Int -> Fun Int Int -> Fun Int Int -> Bool)
quickCheck (functorIdentity :: Three' Int Int -> Bool)
quickCheck ((functorCompose (+1) (*2)) :: Three' Int Int -> Bool)
quickCheck (functorCompose' :: Three' Int Int -> Fun Int Int -> Fun Int Int -> Bool)
quickCheck (functorIdentity :: Four Int Int Int Int -> Bool)
quickCheck ((functorCompose (+1) (*2)) :: Four Int Int Int Int -> Bool)
quickCheck (functorCompose' :: Four Int Int Int Int -> Fun Int Int -> Fun Int Int -> Bool)
quickCheck (functorIdentity :: Four' Int Int -> Bool)
quickCheck ((functorCompose (+1) (*2)) :: Four' Int Int -> Bool)
quickCheck (functorCompose' :: Four' Int Int -> Fun Int Int -> Fun Int Int -> Bool)
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