quickcheck-classes-base: QuickCheck common typeclasses from `base`

[ bsd3, library, testing ] [ Propose Tags ]

This libary is a minimal variant of quickcheck-classes that only provides laws for typeclasses from base. The main purpose of splitting this out is so that primitive can depend on quickcheck-classes-base in its test suite, avoiding the circular dependency that arises if quickcheck-classes is used instead.

This library provides QuickCheck properties to ensure that typeclass instances adhere to the set of laws that they are supposed to. There are other libraries that do similar things, such as genvalidity-hspec and checkers. This library differs from other solutions by not introducing any new typeclasses that the user needs to learn.

Note: on GHC < 8.5, this library uses the higher-kinded typeclasses (Data.Functor.Classes.Show1, Data.Functor.Classes.Eq1, Data.Functor.Classes.Ord1, etc.), but on GHC >= 8.5, it uses -XQuantifiedConstraints to express these constraints more cleanly.

Versions [faq],
Change log changelog.md
Dependencies base (>=4.5 && <5), base-orphans (>=0.1), bifunctors, containers (>=, contravariant, fail, ghc-prim, QuickCheck (>=2.10.0), semigroups (>=0.17), tagged, transformers (>=0.5.0 && <0.6) [details]
License BSD-3-Clause
Copyright 2019 Andrew Martin
Author Andrew Martin, chessai
Maintainer andrew.thaddeus@gmail.com
Category Testing
Home page https://github.com/andrewthad/quickcheck-classes#readme
Source repo head: git clone https://github.com/andrewthad/quickcheck-classes
Uploaded by andrewthad at 2019-08-08T17:14:51Z
Distributions Arch:, NixOS:
Downloads 1512 total (136 in the last 30 days)
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Status Hackage Matrix CI
Docs available [build log]
Last success reported on 2019-08-08 [all 1 reports]


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Include infrastructure for testing class laws of unary type constructors.


Include infrastructure for testing class laws of binary type constructors. Disabling unary-laws while keeping binary-laws enabled is an unsupported configuration.


Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


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