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Within LTS Haskell 24.51 (ghc-9.10.3)

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  1. performTestCase :: Assertion -> IO Result

    HUnit Test.HUnit.Lang

    Performs a single test case.

  2. propertyForAllShrinkShow :: Testable prop => Gen a -> (a -> [a]) -> (a -> [String]) -> (a -> prop) -> Property

    tasty-quickcheck Test.Tasty.QuickCheck

    Optional; used internally in order to improve shrinking. Tests a property but also quantifies over an extra value (with a custom shrink and show function). The Testable instance for functions defines propertyForAllShrinkShow in a way that improves shrinking.

  3. class Uniform a

    random System.Random

    The class of types for which a uniformly distributed value can be drawn from all possible values of the type.

  4. class UniformRange a

    random System.Random

    The class of types for which a uniformly distributed value can be drawn from a range.

  5. uniform :: (RandomGen g, Uniform a) => g -> (a, g)

    random System.Random

    Generates a value uniformly distributed over all possible values of that type. This is a pure version of uniformM.

    Examples

    >>> import System.Random

>>> let pureGen = mkStdGen 137

>>> uniform pureGen :: (Bool, StdGen)
(True,StdGen {unStdGen = SMGen 11285859549637045894 7641485672361121627})

  6. uniformR :: (RandomGen g, UniformRange a) => (a, a) -> g -> (a, g)

    random System.Random

    Generates a value uniformly distributed over the provided range, which is interpreted as inclusive in the lower and upper bound.

    • uniformR (1 :: Int, 4 :: Int) generates values uniformly from the set <math>
    • uniformR (1 :: Float, 4 :: Float) generates values uniformly from the set <math>
    The following law should hold to make the function always defined: 
    uniformR (a, b) = uniformR (b, a)
    This is a pure version of uniformRM.

    Examples

    >>> import System.Random

>>> let pureGen = mkStdGen 137

>>> uniformR (1 :: Int, 4 :: Int) pureGen
(4,StdGen {unStdGen = SMGen 11285859549637045894 7641485672361121627})

  7. class Uniform a

    random System.Random.Stateful

    The class of types for which a uniformly distributed value can be drawn from all possible values of the type.

  8. class UniformRange a

    random System.Random.Stateful

    The class of types for which a uniformly distributed value can be drawn from a range.

  9. uniformByteStringM :: StatefulGen g m => Int -> g -> m ByteString

    random System.Random.Stateful

    Generates a pseudo-random ByteString of the specified size.

  10. uniformDouble01M :: StatefulGen g m => g -> m Double

    random System.Random.Stateful

    Generates uniformly distributed Double in the range <math>. Numbers are generated by generating uniform Word64 and dividing it by <math>. It's used to implement UniformRange instance for Double.

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