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GHC 9.14.1 · lts/ghc-9.14.x · 3e2d568 · 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'"