Gambit vs muttest-rs
Gambit
certora.commuttest-rs
github.comSide by side
| Figure | Gambit | muttest-rs |
|---|---|---|
| Price from | — | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| Plans published | 0 | 0 |
| Spec score · Mutation Testing Tools | 7.8 (#8) | 6.5 (#25) |
| How it works | Gambit introduces faults called mutants into selected contracts and measures whether a test suite detects them. | Its `#[mutate]` macro transforms source code patterns and adds hooks so mutations can be enabled at runtime after a single compilation. |
| Installation | Prebuilt binaries are available for Linux x86-64 and Mac; Windows and Linux ARM users must build from source. | The README instructs users to install the `cargo-muttest` Cargo plugin and add `muttest` to their crate. |
| Intended users | The maker describes Gambit as usable on any Solidity project. | The documented setup is for Rust crate developers who want to assess how well their tests detect code changes. |
| License | The Gambit GitHub repository identifies its license as MIT. | The repository includes an MIT license that permits use, copying, modification, distribution, sublicensing, and sale subject to its terms. |
| Mutation limits | The README lists function-call mutation and swap-arguments-function mutation as disabled operators. | It cannot mutate const or static definitions, `const fn`s, macros or their arguments, patterns, or types. |
| Purpose | Gambit is an open source Solidity mutation testing tool that evaluates and strengthens a testing suite. | muttest-rs is a Rust mutation testing tool for evaluating whether a test suite catches simulated bugs. |
In their own words
Gambit
Gambit is a free, open-source mutation testing tool for Solidity projects. It generates altered contract versions, called mutants, to measure whether a test suite or formal verification specification detects faults. Gambit locates mutation points by traversing a program’s abstract syntax tree and applying predefined syntax transformations. A declarative configuration language lets users tailor mutations to specific parts of a program. Results can be viewed in a dashboard that summarizes mutant verification and calculates a specification score. Gambit can work with the Certora Prover to evaluate formal specifications; that workflow generates mutants and submits a verification job for each to Certora’s server. The command line includes `mutate` for generating mutants and `summary` for presenting them. A compatible `solc` binary is required for the project being mutated. Gambit supports Solidity and is listed for Linux, macOS, and Windows, though prebuilt binaries are available for Linux x86-64 and Mac; Windows and Linux ARM users must build from source. Function-call and swap-arguments-function mutation operators are disabled. The repository identifies the license as MIT. Certora directs product questions to its Help Desk channel on Discord.