# ADR 0008: Testing — Karma + Jasmine

**Date:** 2026-04-26
**Status:** Accepted

## Context

Angular's default test setup uses Karma as the test runner (executing tests in a real Chrome browser) and Jasmine as the assertion/spec framework. Alternatives include Jest (runs in Node via jsdom, no real browser) and Vitest (ESM-native, faster).

Migrating to Jest or Vitest would require changing test utilities, removing `zone.js/testing`, and potentially adjusting Angular testing module setup.

## Decision

Keep Karma + Jasmine. The test suite (54 specs) is small enough that Karma's startup overhead is not a bottleneck. The default Angular TestBed utilities work without modification.

## Consequences

- **Positive:** Zero migration effort. Full compatibility with Angular's `TestBed` and `ComponentFixture` APIs.
- **Positive:** Tests run in a real browser, catching browser-specific issues that jsdom misses.
- **Negative:** Slower startup than Jest/Vitest due to Chrome launch. Acceptable at the current test suite size.
- **Future consideration:** If the test suite grows significantly or CI performance becomes a concern, evaluate migration to Jest with `jest-preset-angular`.