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Incremental Mutation Testing

concept 5 connections

Mutant's mode of operation that restricts analysis to subjects touched in the current iteration/PR. Rationale: developers rightfully refuse to deal with alive mutations in 10-year-old code they didn't write; attention is scoped to the current task. Key to adopting mutation testing today on a real commercial codebase — even if the match expression evaluates to thousands of subjects, incremental mode subsets it to the handful touched, fast enough to run on CI in the normal cycle.

category
practice
takeaway Start mutation testing incrementally
about
Incremental Mutation Testing concept
Takeaway centers on incremental mode.
question How to integrate Mutant with CI
about
Incremental Mutation Testing concept
Answer centers on using incremental mode on a top-level namespace match expression.
talk Mutant on steroids
about
Incremental Mutation Testing concept
Talk promotes incremental mode as the way to start mutation testing today.
person Markus Schirp
recommends
Incremental Mutation Testing concept
Recommends incremental mode as the way to adopt mutation testing on existing codebases.
tool Mutant
related_to
Incremental Mutation Testing concept
Mutant implements incremental mode that subsets subjects to only those touched in the current change.

Provenance

Created in
Mutant on steroids — Markus Schirp at wroclove.rb 2019 2026-04-17 17:53
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