What types of testing exist in the software development process?

Main types of testing in the software development process:

• Unit Testing — testing individual functions or classes.
• Integration Testing — testing the interaction between modules.
• Functional Testing — verifying that the functionality meets the requirements.
• UI Testing — testing the user interface.
• Acceptance Testing — verifying the product's readiness for use.
• Regression Testing — ensuring that new changes haven't broken existing functionality.

In iOS development, XCTest is often used for writing unit and UI tests.