Gopter vs RapidCheck
Gopter
github.comRapidCheck
github.comSide by side
| Figure | Gopter | RapidCheck |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| Linux | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 0 |
| Spec score · Property-Based Testing Tools | 8.6 (#2) | 7.0 (#21) |
| Generators | It provides tighter control over generators than Go's testing/quick package. | RapidCheck includes generators for common types and combinators for building custom generators. |
| License | The repository identifies Gopter as MIT licensed. | The repository identifies its license as BSD-2-Clause. |
| Purpose | Gopter is a Go property-testing library that brings ideas from ScalaCheck and QuickCheck to Go. | RapidCheck is a C++ framework for property-based testing inspired by QuickCheck and similar frameworks. |
| Shrinking | Its shrinkers automatically seek a minimum value that falsifies a property. | When a property fails, RapidCheck tries to find the smallest failing test case and displays it as a counterexample. |
| Stateful testing | Gopter supports stateful tests. | The README describes stateful testing based on commands in the style of Erlang QuickCheck. |
Plans
In their own words
Gopter
Gopter is a free Go module for property-based testing. It creates properties from conditions and generated inputs, then checks whether those properties hold. Its generators provide more control than Go's testing/quick package and can be composed with operations such as Map, FlatMap, SuchThat, and WithShrinker. When a property fails, shrinkers seek a smaller value that still demonstrates the failure. Gopter also includes a generator for regular-expression matches and supports stateful tests based on arbitrary commands. Properties can run with Go's testing.T through TestingRun, and the gopter/convey package provides helpers for using Gopter inside GoConvey tests. Console and formatted reporters present test results. The project declares Go 1.20 and is distributed under the MIT License. Its documentation covers the gopter, gen, prop, arbitrary, commands, and convey packages. The README identifies two omissions: ScalaCheck's Pretty feature is not provided, and parallel commands are not available yet.