What are some effective testing strategies for legacy code?

What are some effective testing strategies for legacy code?

When dealing with legacy code, consider strategies like unit testing, integration testing, and using test doubles.

How can I start implementing unit tests in a legacy codebase?

Begin by identifying critical components, then write tests for those areas. Use a testing framework compatible with your code.

What tools can help with testing legacy code?

Tools like JUnit for Java, NUnit for .NET, and Jest for JavaScript can be very helpful. Additionally, consider using code coverage tools.

Are there any risks associated with testing legacy code?

Yes, risks include breaking existing functionality and the potential for increased complexity. It's important to proceed cautiously.

Can you suggest a step-by-step approach to refactoring legacy code?

Sure! Start with understanding the code, write tests, refactor small parts, and continuously test to ensure functionality.