FSharp.Hedgehog vs QCheck
FSharp.Hedgehog
github.comQCheck
github.comSide by side
| Figure | FSharp.Hedgehog | QCheck |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | Yes |
| Plans published | 0 | 1 |
| Spec score · Property-Based Testing Tools | 7.5 (#13) | 7.9 (#9) |
| Generators | It includes generators for primitive values and composable operations for building generators for complex types. | QCheck includes combinators for constructing random generators, including generators for lists, arrays, recursive types, algebraic types, and tuples. |
| Installation | The opened project pages do not state a download or platform-specific installation method. | QCheck can be installed through opam, and the README recommends qcheck-core for a minimal dependency set. |
| Integrated shrinking | When a property fails, Hedgehog shrinks the failing input to a smaller counterexample while preserving the generated values’ invariants. | The README says shrinking is built into QCheck2 generators, so users do not need to hand-write shrinkers for that API. |
| License | The repository license is Apache License 2.0. | The repository identifies its license as BSD-2-Clause and says the code is released under the BSD license. |
| Purpose | Hedgehog is a property-based testing system for .NET that automatically generates inputs to help find edge cases. | QCheck is a QuickCheck-inspired property-based testing library for OCaml. |
Plans
In their own words
FSharp.Hedgehog
FSharp.Hedgehog has no write-up on Specifiction yet; its figures are above.
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.