Open Source Mutation Showcase

See how many mutants are uncovered in open source Deno projects by Mutasaurus, showing potential hidden bugs in their test suites.

58%

@img

Mutations431
Runtime3m 2s
Killed: 249
Survived: 146
Errors: 0
Timeouts: 36
30%

@numio/bigmath

Mutations375
Runtime3m 16s
Killed: 112
Survived: 46
Errors: 0
Timeouts: 217
0%

@fedify/fedify

Mutations214
Runtime23s
Killed: 0
Survived: 214
Errors: 0
Timeouts: 0
33%

@logtape/logtape

Mutations204
Runtime42s
Killed: 67
Survived: 135
Errors: 0
Timeouts: 2
41%

@nfnitloop/better-iterators

Mutations96
Runtime30s
Killed: 39
Survived: 52
Errors: 0
Timeouts: 5
76%

@b-life-org/moneta

Mutations88
Runtime18s
Killed: 67
Survived: 18
Errors: 0
Timeouts: 3
57%

@dv/image-generation

Mutations61
Runtime15s
Killed: 35
Survived: 26
Errors: 0
Timeouts: 0
38%

@shapex/shapex

Mutations8
Runtime5s
Killed: 3
Survived: 4
Errors: 0
Timeouts: 1

Oh No!

Mutasaurus was unable to generate Mutations for these projects.

@easrng/safe-whatwg@dudasaus/open-file-location@sigma/xcap-js@iuioiua/redis@doctor/log@webui/deno-webui@sigmasd/jsr-mcp@egamagz/todo@texttoanything/deno@scarf/json-map@poolifier/poolifier-web-worker

Maybe you can help us out! Join the excavation, help dig up better ways to test Deno applications!

Mutations are not run by their respective open source project maintainers. Just like traditional test coverage, the mutation score does not tell the full story of a test suite, and while it may be a better proxy that traditional test coverage for quality, scores should be used as a guide, not a definitive measure. Scores across different projects should not be compared. Projects that did not generate mutations typically indicate an issue with Mutasaurus, not the project under mutation, please report these issues to Mutasaurus maintainers.

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