Mutatest vs Mutode
Mutatest
mutatest.readthedocs.ioMutode
thesoftwaredesignlab.github.ioSide by side
| Figure | Mutatest | Mutode |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | Yes | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 1 | 0 |
| Spec score · Mutation Testing Tools | 8.7 (#1) | 6.7 (#23) |
| Integrations | The documentation describes running test commands such as pytest and using coverage data to filter mutation targets. | The documentation describes npm installation and execution but does not list third-party service integrations. |
| Mutation operators | Supported operators include arithmetic, bitwise, Boolean, comparison, membership, identity, conditional and index mutations. | Documented operators include changing literals and conditionals, altering math operators, and removing code elements such as array elements, function arguments, lines, and switch cases. |
| Parallel execution | Multiprocessing is supported on Python 3.8; parallelization is not supported on Python 3.7. | Mutode creates project copies for concurrent mutant runners and supports configuring the number of runners. |
| Purpose | Mutatest is a diagnostic command-line tool for assessing test coverage by checking whether tests detect small code mutations. | Mutode performs mutation testing for Node.js and JavaScript. |
| What it does | Mutatest evaluates Python test quality by introducing small code mutations and checking whether the test suite detects them. | Mutode generates small code changes called mutants and runs tests to reveal whether the tests detect them. |
Plans
In their own words
Mutatest
Mutatest is a free command-line tool for Python projects that checks whether tests catch small changes to code. It creates valid mutations from Python’s Abstract Syntax Tree grammar and applies them to local __pycache__ files rather than changing source files. If coverage data is available, it can limit targets to lines marked as covered. Mutations are sampled randomly, with a seed available to make runs reproducible. Command-line controls include run modes, mutation categories, file exclusions, timeouts, reports, and thresholds for surviving mutants; an API supports custom controls. The documentation describes using test commands such as pytest and coverage data to filter targets. Mutatest can raise an exception when surviving mutants meet a configured threshold, including in automated runs such as CI. It supports Linux, macOS, and Windows, and is free under the MIT License. Installation requires Python 3.7 or 3.8; multiprocessing is available on 3.8, but not 3.7. Repeated test runs can be slow, so it is intended for diagnostics rather than every commit across an entire codebase.
Mutode
Mutode has no write-up on Specifiction yet; its figures are above.