What is the difference between regression and sanity testing?

Question

Accepted Answer

Sanity testing checks specific functionalities after changes, while regression testing ensures overall system stability post-changes.

Purpose: Sanity testing verifies that a particular function works after changes, while regression testing checks that existing features remain unaffected.
Scope: Sanity testing is narrow and focused, often limited to specific areas, whereas regression testing is broader, covering the entire application.
Example of Sanity Testing: After a bug fix in a login feature, sanity testing would check only the login functionality to ensure it works.
Example of Regression Testing: After a new feature is added, regression testing would involve testing all existing features to confirm they still function correctly.
Execution Time: Sanity tests are usually quick and can be executed in a short time, while regression tests can be extensive and time-consuming.

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