# Questions to Ask

- Are all tests passing?
- Are new features reasonably tested?
- Are corner cases tested?
- Is it using unit tests where possible, integration tests where necessary?
- Are there tests for NFRs, e.g. performance?

Learn more from the following resources:

- [@article@Unit Testing Best Practices - IBM](https://www.ibm.com/think/insights/unit-testing-best-practices)
- [@article@Integration Testing - Microsoft Engineering Playbook](https://microsoft.github.io/code-with-engineering-playbook/automated-testing/integration-testing/)
- [@article@The Practical Test Pyramid - Martin Fowler](https://martinfowler.com/articles/practical-test-pyramid.html)