test: add mutation testing with Infection PHP #34

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opened 2026-02-20 16:39:54 +00:00 by Clotho · 0 comments

Clotho commented

2026-02-20 16:39:54 +00:00

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Problem

Test suite coverage percentage alone doesn'''t verify test quality. Mutation testing finds tests that pass even when the source code is deliberately broken.

Acceptance Criteria

Add infection/infection to dev dependencies
Configure infection.json5 targeting critical services: EntitlementService, WorkspaceTeamService, TotpService, EntitlementWebhookService
Add composer mutate script
Achieve >80% mutation score indicator (MSI) on covered code
Document minimum acceptable MSI in CLAUDE.md

Discovered during automated scan (issue #3)

## Problem Test suite coverage percentage alone doesn'''t verify test quality. Mutation testing finds tests that pass even when the source code is deliberately broken. ## Acceptance Criteria - Add `infection/infection` to dev dependencies - Configure `infection.json5` targeting critical services: `EntitlementService`, `WorkspaceTeamService`, `TotpService`, `EntitlementWebhookService` - Add `composer mutate` script - Achieve >80% mutation score indicator (MSI) on covered code - Document minimum acceptable MSI in `CLAUDE.md` _Discovered during automated scan (issue #3)_