Which types of tests can be conducted as part of the CI process?

The choice of unit tests, smoke tests, and end-to-end tests as part of the Continuous Integration (CI) process is appropriate because these types of tests align well with the objectives of CI.

Unit tests are essential in CI as they verify the functionality of individual components in isolation, ensuring that the smallest parts of the software perform as expected. This early detection of defects contributes to overall code quality and stability.

Smoke tests are designed to be a preliminary set of tests that check the basic functionality of an application after a new build is created. They help to quickly ascertain whether the most critical features are working correctly, thereby determining if the build is stable enough for further testing.

End-to-end tests are vital as they validate the complete flow of an application from start to finish, ensuring all integrated components function correctly in real-world scenarios. This type of test is crucial for ensuring that the entire system meets the intended requirements and behaves as expected when deployed.

In contrast, the other options include testing types that may not fit neatly within the CI process. Manual testing, while important, does not align with the automation emphasis of CI, and performance testing typically occurs in separate testing phases rather than during the CI cycle. Code reviews are crucial for quality assurance but are not classified