Safe Haskell	Safe
Language	Haskell2010

Test.QuickCheck.Safe

Contents

Checking properties
Creating and combining properties
Miscellaneous

Description

This module implements a simplified, pure version of Test.Quickcheck's quickCheck functionality.

Synopsis

Checking properties

quickCheck :: STestable prop => QCGen -> prop -> String Source #

Cf. quickCheck. Note that in contrast to QuickCheck's function, this one takes an additional QCGen argument.

>>> putStr $ quickCheck (inventQCGen ()) (\x -> length (x :: [()]) < 10)
*** Failed! Falsifiable (after 18 tests and 3 shrinks):
[(),(),(),(),(),(),(),(),(),(),(),(),(),(),()]

quickCheckResult :: STestable prop => QCGen -> prop -> Result Source #

Cf. quickCheckResult. Note that in contrast to QuickCheck's function, this one takes an additional QCGen argument.

quickCheckWith :: STestable prop => Args -> QCGen -> prop -> String Source #

Cf. quickCheckWith. Note that in contrast to QuickCheck's function, this one takes an additional QCGen argument.

quickCheckWithResult :: STestable prop => Args -> QCGen -> prop -> Result Source #

Cf. quickCheckWithResult. Note that in contrast to QuickCheck's function, this one takes an additional QCGen argument.

Creating and combining properties

class STestable prop Source #

Minimal complete definition

sProperty

Instances

STestable Bool Source #
Methods sProperty :: Bool -> SProperty
STestable prop => STestable (Gen prop) Source #
Methods sProperty :: Gen prop -> SProperty
(Arbitrary a, Show a, STestable prop) => STestable (a -> prop) Source #
Methods sProperty :: (a -> prop) -> SProperty

(==>) :: STestable prop => Bool -> prop -> SProperty Source #

Implication. Cf. ==>.

(.||.) :: (STestable prop2, STestable prop1) => prop1 -> prop2 -> SProperty Source #

Disjunction. Cf. .||..

(.&&.) :: (STestable prop2, STestable prop1) => prop1 -> prop2 -> SProperty Source #

Conjunction. Cf. .&&..

(.&.) :: (STestable prop2, STestable prop1) => prop1 -> prop2 -> SProperty Source #

Nondeterministic conjunction. Cf. &..

(===) :: (Eq a, Show a) => a -> a -> SProperty Source #

Equality test. Cf. ===.

label :: STestable prop => String -> prop -> SProperty Source #

Label tests. Cf. label.

shrinking :: STestable prop => (a -> [a]) -> a -> (a -> prop) -> SProperty Source #

Shrink counterexamples. Cf. shrinking.

noShrinking :: STestable prop => prop -> SProperty Source #

Suppress shrinking of counterexamples. Cf. noShrinking.

mapSize :: STestable prop => (Int -> Int) -> prop -> SProperty Source #

Adjust testcase sizes. Cf. mapSize.

forAll :: (Show a, STestable prop) => Gen a -> (a -> prop) -> SProperty Source #

Universal quantification. Cf. forAll.

forAllShrink :: (Show a, STestable prop) => Gen a -> (a -> [a]) -> (a -> prop) -> SProperty Source #

Universal quantification with shrinking. Cf. forAllShrink.

Miscellaneous

inventQCGen :: a -> QCGen Source #

inventQCGen invokes newQCGen via unsafePerformIO. It is useful in connection with the quickCheck family of functions.

module Test.QuickCheck