What is regression testing, sanity testing, smoke testing

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Accepted Answer

Regression testing verifies that changes made to the software do not affect existing functionality. Sanity testing and smoke testing are types of regression testing.

Regression testing ensures that new changes do not break existing functionality
Sanity testing is a quick test to ensure that the basic functionality of the application is working after a minor change
Smoke testing is a quick test to ensure that the critical functionality of the application is working after a major change
Regression testing is performed after every change, sanity testing is performed after minor changes, and smoke testing is performed after major changes
Example: After adding a new feature to a website, regression testing would be performed to ensure that all existing features still work as expected

What is regression testing, sanity testing, smoke testing

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