Safe Haskell	None
Language	Haskell2010

Hedgehog.Lens

Synopsis

wellFormedPrism :: Monad m => (Show large, Eq large) => (Show small, Eq small) => Gen large -> Gen small -> Prism' large small -> PropertyT m ()
wellFormedLens :: Monad m => (Show large, Eq large) => (Show small, Eq small) => Gen large -> Gen small -> Lens' large small -> PropertyT m ()
wellFormedIso :: Monad m => (Show a, Eq a) => (Show b, Eq b) => Gen a -> Gen b -> Iso' a b -> PropertyT m ()
prismExample :: Monad m => (Show large, Eq large) => (Show small, Eq small) => Prism' large small -> large -> small -> PropertyT m ()

Documentation

wellFormedPrism Source #

Arguments

:: Monad m
=> (Show large, Eq large)
=> (Show small, Eq small)
=> Gen large
-> Gen small
-> Prism' large small	Prism signifying that the `small` type is a subset of the `large` type
-> PropertyT m ()

Checks whether a prism respects the well-formedness laws:

1) Get-Set Prism Law 2) Set-Get Prism Law

wellFormedLens Source #

Arguments

:: Monad m
=> (Show large, Eq large)
=> (Show small, Eq small)
=> Gen large
-> Gen small
-> Lens' large small	Lens signifying that the `small` type is a constituent part of the `large` type
-> PropertyT m ()

Checks whether a lens respects the well-formedness laws:

1) Get-Put Lens Law 2) Put-Get Lens Law 3) Put-Put Lens Law

wellFormedIso Source #

Arguments

:: Monad m
=> (Show a, Eq a)
=> (Show b, Eq b)
=> Gen a
-> Gen b
-> Iso' a b	Isomorphism signifying that types `a` and `b` are basically the same thing
-> PropertyT m ()

Checks whether an isomorphism respects the well-formedness laws:

1) Set-Get Iso Law 2) Get-Set Iso Law

prismExample Source #

Arguments

:: Monad m
=> (Show large, Eq large)
=> (Show small, Eq small)
=> Prism' large small	Prism signifying that the `small` type is a subset of the `large` type
-> large
-> small
-> PropertyT m ()

Assert that a prism matches for a particular set of values: A review of the small value should produce the large value, and a preview of the large value should produce the small value.