What kind of testing have you used in your practice?

In testing practice, I have used several types of testing:

• Functional testing — verifying that the application's functionality works according to requirements.
• Regression testing — retesting after changes to ensure nothing is broken.
• Integration testing — checking the interaction between modules or services.
• Automated testing — writing scripts for automatic test execution (unit tests, API tests).
• Performance testing — load testing to evaluate system stability under load.
• Security testing — checking for vulnerabilities and data protection.

Depending on the project and requirements, I used different combinations of these testing types.