Eris vs QCheck
Eris
github.comQCheck
github.comSide by side
| Figure | Eris | QCheck |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Linux | — | Yes |
| Self-hosted | Yes | — |
| Plans published | 0 | 1 |
| Spec score · Property-Based Testing Tools | 7.6 (#12) | 7.9 (#9) |
| Generators | Its documented generators cover scalar values, collections, composite values, and domain-based values such as names and dates. | QCheck includes combinators for constructing random generators, including generators for lists, arrays, recursive types, algebraic types, and tuples. |
| Installation | The README gives Composer as the installation method and shows the command composer require --dev giorgiosironi/eris. | QCheck can be installed through opam, and the README recommends qcheck-core for a minimal dependency set. |
| License | The repository identifies the project as MIT licensed. | The repository identifies its license as BSD-2-Clause and says the code is released under the BSD license. |
| Maintainer | The project documentation credits Giorgio Sironi. | The project page says it is maintained by c-cube, whose GitHub profile identifies Simon Cruanes. |
| Purpose | Eris brings QuickCheck-style property-based testing to PHP and PHPUnit. | QCheck is a QuickCheck-inspired property-based testing library for OCaml. |
Plans
In their own words
QCheck
QCheck is a property-based testing library for OCaml, inspired by QuickCheck. Rather than relying only on hand-picked examples, it provides combinators to generate values such as lists, arrays, tuples, recursive types, and algebraic types for checking properties. When a check fails, generators can be paired with printers and shrinkers to show and reduce counterexamples. QCheck2 builds shrinking into its generators, though the project describes that API as less battle-tested than QCheck. The package family includes qcheck-core, qcheck-ounit, qcheck-alcotest, qcheck, and ppx_deriving_qcheck; the last can derive generators from type declarations. Runner options include QCheck_base_runner in qcheck-core and QCheck_runner with OUnit compatibility in qcheck, with integration layers for OUnit and Alcotest. The project also points to qcheck-stm for sequential and parallel model-based tests and qcheck-lin for sequential consistency testing. Installation is available through opam, and the source can be built with make. The minimal qcheck-core package depends only on unix and dune. QCheck is free and licensed under BSD-2-Clause.