cargo-mutants vs PIT
cargo-mutants
mutants.rs
PIT
pitest.orgSide by side
| Figure | cargo-mutants | PIT |
|---|---|---|
| Price from | — | — |
| Free plan | — | — |
| Free trial | — | — |
| Open source | — | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 0 | 0 |
| Spec score · Mutation Testing Tools | 7.5 (#12) | 7.0 (#20) |
| Purpose | cargo-mutants is a mutation testing tool for Rust that finds places where bugs could be inserted without causing tests to fail. | PIT runs unit tests against automatically modified versions of application code to measure whether tests detect faults. |
| Support | The project README invites users to share experience reports in GitHub Discussions and sponsor development. | PIT directs users to its Google Group for support questions. |
In their own words
cargo-mutants
cargo-mutants has no write-up on Specifiction yet; its figures are above.
PIT
PIT is a free mutation-testing tool for Java and JVM bytecode projects. It measures whether unit tests detect faults by running them against modified versions of application code. Configurable bytecode mutations can remove method calls, invert logic, or change return values. PIT selects and prioritizes tests using line coverage, execution speed, and naming conventions, then reports mutation coverage alongside line coverage. It can run from the command line, Ant, or Maven; third-party integrations are listed for Gradle, Eclipse, and IntelliJ. Java is supported directly, and Kotlin use is available through the ArcMutate plugin. PIT supports JUnit 3, JUnit 4, and TestNG; JUnit 5 needs a plugin. Versions 1.4.0 and later require Java 8 or above and JUnit or TestNG on the classpath. Mutation runs can take a long time depending on codebase size and test-suite speed, so PIT recommends focusing on changed code. It mutates bytecode and requires line numbers and source file names in that bytecode.