What is your position regarding writing unit tests and their importance in the development process?

Unit tests are an important tool in the development process that help:

• Ensure code correctness and quickly identify errors.
• Facilitate refactoring by providing confidence that changes haven't broken existing functionality.
• Document code behavior through test scenarios.

I believe that writing unit tests should be an integral part of development, especially for business logic and critical components. For junior developers, it's also a great way to better understand the code and improve skills.

However, it's important that tests are of high quality — covering key scenarios, being understandable and maintainable. Excessive or poorly written testing can lead to additional time costs without real benefit.