Safe Haskell	Safe-Inferred
Language	Haskell2010

Test.Validity.Applicative

Description

Applicative properties

You will need TypeApplications to use these.

Synopsis

applicativeSpec :: forall (f :: Type -> Type). (HasCallStack, Eq (f Int), Show (f Int), Applicative f, Typeable f, GenValid (f Int)) => Spec
applicativeSpecOnArbitrary :: forall (f :: Type -> Type). (HasCallStack, Eq (f Int), Show (f Int), Applicative f, Typeable f, Arbitrary (f Int)) => Spec
applicativeSpecOnGens :: forall (f :: Type -> Type) (a :: Type) (b :: Type) (c :: Type). (HasCallStack, Show a, Show (f a), Eq (f a), Show (f b), Eq (f b), Show (f c), Eq (f c), Applicative f, Typeable f, Typeable a, Typeable b, Typeable c) => Gen a -> String -> Gen (f a) -> String -> Gen (f b) -> String -> Gen (a -> b) -> String -> Gen (f (a -> b)) -> String -> Gen (f (b -> c)) -> String -> Spec

Documentation

applicativeSpec :: forall (f :: Type -> Type). (HasCallStack, Eq (f Int), Show (f Int), Applicative f, Typeable f, GenValid (f Int)) => Spec Source #

Standard test spec for properties of Applicative instances for values generated with GenValid instances

Example usage:

applicativeSpecOnArbitrary @[]

applicativeSpecOnArbitrary :: forall (f :: Type -> Type). (HasCallStack, Eq (f Int), Show (f Int), Applicative f, Typeable f, Arbitrary (f Int)) => Spec Source #

Standard test spec for properties of Applicative instances for values generated with Arbitrary instances

Example usage:

applicativeSpecOnArbitrary @[]

applicativeSpecOnGens :: forall (f :: Type -> Type) (a :: Type) (b :: Type) (c :: Type). (HasCallStack, Show a, Show (f a), Eq (f a), Show (f b), Eq (f b), Show (f c), Eq (f c), Applicative f, Typeable f, Typeable a, Typeable b, Typeable c) => Gen a -> String -> Gen (f a) -> String -> Gen (f b) -> String -> Gen (a -> b) -> String -> Gen (f (a -> b)) -> String -> Gen (f (b -> c)) -> String -> Spec Source #

Standard test spec for properties of Applicative instances for values generated by given generators (and names for those generator).

Unless you are building a specific regression test, you probably want to use the other applicativeSpec functions.

Example usage:

applicativeSpecOnGens
    @Maybe
    @String
    (pure "ABC")
    "ABC"
    (Just <$> pure "ABC")
    "Just an ABC"
    (pure Nothing)
    "purely Nothing"
    ((++) <$> genValid)
    "prepends"
    (pure <$> ((++) <$> genValid))
    "prepends in a Just"
    (pure <$> (flip (++) <$> genValid))
    "appends in a Just"