what-to-test
Use when writing tests, improving coverage, or deciding what to test in this CLI
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What to Test
Philosophy
Test user-facing behavior. If a user would notice it's broken, it needs a test.
All CLI commands must be tested - including commands marked "internal". Internal commands are still user-facing (Matt uses them daily).
What Makes a Good Test
- Tests behavior users depend on
- Validates real workflows, not implementation details
- Catches regressions before users do
Do NOT write tests just to increase coverage numbers. Use coverage as a guide to find untested user-facing behavior.
What NOT to Test
Use /* v8 ignore start */ for:
- Integration boundaries (actual git calls, shell execution, filesystem)
- Service layers that get mocked in tests
- Entry points and DI wiring
- Boilerplate, unreachable error branches
Testing Pattern
- Export a
runX()function from command files for testability - Mock external services (GitService, PromptService)
- Test error paths users will actually hit
- Use v8 ignore for CLI formatting/presentation code
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