What is the difference between smoke testing and regression testing?

Smoke testing is a superficial check of the main functions of the application to ensure that the build is stable and ready for more in-depth testing. It is usually performed after build or deployment and covers critical paths.

Regression testing aims to verify that new changes in the code have not broken existing functionality. It is more comprehensive and covers a wide range of tests, including previously found bugs.

In summary:

• Smoke tests are quick, superficial, and check basic operability.
• Regression tests are more thorough and verify that changes have not broken the functionality.