What is the difference between Smoke Testing and Regression Testing?

What is the difference between Smoke Testing and Regression Testing? What is smoke testing? It is a testing method that determines the stability of a deployed software build. It is also called “Surface level testing” where the stability of the system is verified. The QA team gets the necessary confirmation from the smoke testing process on whether to move further levels of testing or not. On each build, a minimal set of tests are run in order to test the software functionalities. It is also known as “Build Verification testing.”

What is regression testing? It is a testing method that ensures that the updations or modifications that have been done to the code do not modify the existing functionalities of the software application. Already executed test cases that are partially or fully selected are re-executed in order to make sure that the existing functionalities are working just fine. Even a small tweak made in the software due to changes and updations done by the tester can lead to crucial code related issues. For this specific purpose, regression testing is conducted to ensure that the existing functionalities are working just fine despite making changes to the software.

Difference between smoke testing and regression testing: Smoke testing

Regression testing

- The stability of the system is verified

- The rationality of the system is verified

- After performing regression test, smoke test is performed

- Regression testing is conducted throughout the software testing process depending upon specific conditions

- Smoke tests are conducted in order to ascertain whether to accept or reject a build - This testing method is both scripted and documented - Time and manpower requirement is less when compared to regression testing

- Regression tests are not performed to accept or reject a build, instead they are performed to ensure that code changes do not affect the existing functionalities - This testing method is neither documented nor scripted

- It is surface level testing

- Time and manpower requirement is more than smoke testing

- It is performed by developers

- It is deep level testing - It is performed by testers

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