What types of testing do you apply in your work?

In my work, I use several types of testing to ensure product quality:

• Unit Testing — testing individual functions or components.
• Integration Testing — testing the interaction between modules.
• Functional Testing — verifying that the functionality meets requirements.
• Regression Testing — ensuring that new changes do not break existing functionality.
• System Testing — testing the entire system as a whole.
• Automated Testing — writing scripts for automatic test execution.
• Performance Testing — checking speed and stability under load.

For example, for a web application, I can write unit tests with Jest, perform integration tests using Selenium, and also run load tests with JMeter.