Safe Haskell	None
Language	Haskell2010

Test.Validity.Applicative

Description

Applicative properties

You will need TypeApplications to use these.

Synopsis

Documentation

applicativeSpecOnValid :: forall f. (Eq (f Int), Show (f Int), Applicative f, Typeable f, GenValid (f Int)) => Spec #

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

Example usage:

applicativeSpecOnArbitrary @[]

applicativeSpec :: forall f. (Eq (f Int), Show (f Int), Applicative f, Typeable f, GenUnchecked (f Int)) => Spec #

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

Example usage:

applicativeSpecOnArbitrary @[]

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

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

Example usage:

applicativeSpecOnArbitrary @[]

applicativeSpecOnGens :: forall f a b c. (Show a, Eq 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 #

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"