Test code should be held to the same quality standards as production code. Tests are not second-class citizens in the codebase.
- Maintainability: Tests should be easy to update when requirements change
- Readability: Tests should be clear and understandable at first glance
- Reliability: Tests should be deterministic and not flaky
- Isolation: Each test should be independent and not affect other tests
- Documentation: Tests serve as living documentation of the system's behavior
Just like production code, tests should follow:
- DRY (Don't Repeat Yourself): Extract common setup logic into helpers and builders
- Single Responsibility: Each test should verify one behavior
- Clear Intent: Test names and structure should make the purpose obvious
- Clean Code: Apply the same refactoring and quality standards as production code
Remember: If the test code is hard to read or maintain, it will become a burden rather than an asset.