HORIZON HASKELLDocslts/ghc-10.0.x8174fa42026-10-11Search names, modules, packages, or :: a typeCtrl K

GHC 10.0.0.20260917 · lts/ghc-10.0.x · 8174fa4 · 2026-10-11

Modulegenvalidity-hspec-1.0.0.4Haskell2010

Test.Validity.Monoid

Monoid properties

You will need TypeApplications to use these.

  • 4 values
valuemonoidSpecOnGen
  1. :: (Show a, Eq a, Monoid a, Typeable a)
  2. => Gen a
  3. -> String
  4. -> a -> [a]
  5. -> Spec
#

Standard test spec for properties of Monoid instances for values generated by a given generator (and name for that generator).

Example usage:

monoidSpecOnGen (pure "a") "singleton list of 'a'"