mirror of
https://github.com/github/semantic.git
synced 2024-12-22 06:11:49 +03:00
da2a3fc7a8
This fixes a lot of unnecessary exports in the specs, removes a couple otiose imports (comonads and semigroups are provided by base, I beleive), and removes a duplicated function.
62 lines
2.7 KiB
Haskell
62 lines
2.7 KiB
Haskell
{-# LANGUAGE RankNTypes, ScopedTypeVariables #-}
|
|
module Data.Mergeable.Spec (spec) where
|
|
|
|
import Control.Applicative (Alternative(..))
|
|
import Data.Functor.Identity
|
|
import Data.Functor.Listable
|
|
import Data.Maybe (catMaybes)
|
|
import Data.Mergeable
|
|
import Test.Hspec
|
|
import Test.Hspec.LeanCheck
|
|
import Test.LeanCheck
|
|
|
|
spec :: Spec
|
|
spec = parallel $ do
|
|
describe "[]" $ do
|
|
withAlternativeInstances sequenceAltLaws (tiers :: [Tier String])
|
|
withAlternativeInstances mergeLaws (tiers :: [Tier String])
|
|
describe "Maybe" $ do
|
|
withAlternativeInstances sequenceAltLaws (tiers :: [Tier (Maybe Char)])
|
|
withAlternativeInstances mergeLaws (tiers :: [Tier (Maybe Char)])
|
|
describe "Identity" $ do
|
|
withAlternativeInstances sequenceAltLaws (Identity `mapT` tiers :: [Tier (Identity Char)])
|
|
withAlternativeInstances mergeLaws (Identity `mapT` tiers :: [Tier (Identity Char)])
|
|
describe "ListableSyntax" $ do
|
|
withAlternativeInstances sequenceAltLaws (tiers :: [Tier (ListableSyntax Char)])
|
|
withAlternativeInstances mergeLaws (tiers :: [Tier (ListableSyntax Char)])
|
|
|
|
prop "subsumes catMaybes/Just" $
|
|
\ a -> sequenceAlt a `shouldBe` pure (catMaybes (a :: [Maybe Char]))
|
|
|
|
mergeLaws :: forall f g a. (Mergeable f, Alternative g, Eq (g (f a)), Show (f a), Show (g (f a))) => [Tier (f a)] -> [Tier (Blind (a -> g a))] -> Spec
|
|
mergeLaws value function = describe "merge" $ do
|
|
prop "identity" . forAll value $
|
|
\ a -> merge pure a `shouldNotBe` (empty :: g (f a))
|
|
|
|
prop "relationship with sequenceAlt" . forAll (value >< function) $
|
|
\ (a, f) -> merge (getBlind f) a `shouldBe` sequenceAlt (fmap (getBlind f) a)
|
|
|
|
sequenceAltLaws :: forall f g a. (Mergeable f, Alternative g, Eq (g (f a)), Show (f a), Show (g (f a))) => [Tier (f a)] -> [Tier (Blind (a -> g a))] -> Spec
|
|
sequenceAltLaws value function = describe "sequenceAlt" $ do
|
|
prop "identity" . forAll value $
|
|
\ a -> sequenceAlt (pure <$> a) `shouldNotBe` (empty :: g (f a))
|
|
|
|
prop "relationship with merge" . forAll (productWith ((Blind .) . fmap . getBlind) function value :: [Tier (Blind (f (g a)))]) $
|
|
\ a -> sequenceAlt (getBlind a) `shouldBe` merge id (getBlind a)
|
|
|
|
|
|
withAlternativeInstances :: forall f a. (Listable a, Eq (f a), Show (f a)) => (forall g. (Alternative g, Eq (g (f a)), Show (g (f a))) => [Tier (f a)] -> [Tier (Blind (a -> g a))] -> Spec) -> [Tier (f a)] -> Spec
|
|
withAlternativeInstances laws gen = do
|
|
describe "[]" $ laws gen (fmap const `mapT` tiers :: [Tier (Blind (a -> [a]))])
|
|
describe "Maybe" $ laws gen (fmap const `mapT` tiers :: [Tier (Blind (a -> Maybe a))])
|
|
|
|
|
|
newtype Blind a = Blind { getBlind :: a }
|
|
deriving Functor
|
|
|
|
instance Listable a => Listable (Blind a) where
|
|
tiers = Blind `mapT` tiers
|
|
|
|
instance Show (Blind a) where
|
|
showsPrec _ _ = showString "*"
|