Safe Haskell	None
Language	Haskell2010

Test.QuickCheck.HigherOrder.Internal.Testable

Contents

Syntax for properties
Auxiliary functions

Description

An alternative to Testable

Synopsis

data Equation a = (:=:) a a
data Implication a b = (:==>) a b
type EqImpl a b = Implication (Equation a) (Equation b)
class Decidable a where
- decide :: a -> Bool
quickCheck' :: Testable' prop => prop -> IO ()
quickCheckWith' :: Testable' prop => Args -> prop -> IO ()
ok :: Testable' prop => String -> prop -> (String, Property)
ko :: Testable' prop => String -> prop -> (String, Property)
quickChecks :: [(String, Property)] -> IO Bool

Syntax for properties

data Equation a Source #

Equation: an equals sign between two values.

Constructors

(:=:) a a infix 5

Instances

Eq a => Eq (Equation a) Source #
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods (==) :: Equation a -> Equation a -> Bool # (/=) :: Equation a -> Equation a -> Bool #
Ord a => Ord (Equation a) Source #
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods compare :: Equation a -> Equation a -> Ordering # (<) :: Equation a -> Equation a -> Bool # (<=) :: Equation a -> Equation a -> Bool # (>) :: Equation a -> Equation a -> Bool # (>=) :: Equation a -> Equation a -> Bool # max :: Equation a -> Equation a -> Equation a # min :: Equation a -> Equation a -> Equation a #
Show a => Show (Equation a) Source #
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods showsPrec :: Int -> Equation a -> ShowS # show :: Equation a -> String # showList :: [Equation a] -> ShowS #
TestEq a => Testable (Equation a) Source #
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods property :: Equation a -> Property # propertyForAllShrinkShow :: Gen a0 -> (a0 -> [a0]) -> (a0 -> [String]) -> (a0 -> Equation a) -> Property #
TestEq a => Testable' (Equation a) Source #
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods property' :: Equation a -> Property Source #
Eq a => Decidable (Equation a) Source #
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods decide :: Equation a -> Bool Source #

data Implication a b Source #

Expressions denoting a logical implication.

Constructors

(:==>) a b infixr 2

Instances

(Decidable a, Testable b) => Testable (Implication a b) Source #	Just use `(==>)`.
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods property :: Implication a b -> Property # propertyForAllShrinkShow :: Gen a0 -> (a0 -> [a0]) -> (a0 -> [String]) -> (a0 -> Implication a b) -> Property #
(Decidable a, Testable' b) => Testable' (Implication a b) Source #	Just use `(==>)`.
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods property' :: Implication a b -> Property Source #

type EqImpl a b = Implication (Equation a) (Equation b) Source #

Implication between two equations.

class Decidable a where Source #

Decidable property.

Methods

decide :: a -> Bool Source #

The definition of decidability: we can compute whether a property is true.

Instances

Decidable Bool Source #
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods decide :: Bool -> Bool Source #
Eq a => Decidable (Equation a) Source #
Instance details Defined in Test.QuickCheck.HigherOrder.Internal.Testable Methods decide :: Equation a -> Bool Source #

Auxiliary functions

quickCheck' :: Testable' prop => prop -> IO () Source #

Variant of quickCheck using the alternative Testable'.

quickCheckWith' :: Testable' prop => Args -> prop -> IO () Source #

Variant of quickCheckWith using the alternative Testable'.

ok :: Testable' prop => String -> prop -> (String, Property) Source #

A named property that should pass.

Use ok and ko to construct lists of named properties [(String, Property)], which can be run using quickChecks, or testProperties from tasty-quickcheck.

ko :: Testable' prop => String -> prop -> (String, Property) Source #

A named property that should fail.