What is functional testing

Functional testing is a type of testing which involves testing the functional requirements of the system under test. Each of the application’s business requirements specifications is validated in this type of testing by passing test data and comparing the actual result with the expected result.

Types of Functional testing

Integration testing – In integration testing, the interfacing between the inter-connected modules is tested.

System testing –  In system testing, the application as a whole is tested against its requirement specifications.

Acceptance testing – Acceptance testing is performed after system testing and it involves validation of all the business requirements to make sure that the application can be accepted for delivery.

Smoke testing – Smoke testing is a type of testing that involves the execution of a limited number of test cases to ensure that a new build can be considered for thorough testing. If the smoke test cases fail, then the build is rejected for further testing.

Regression testing – Regression testing is the type of testing that is performed to ensure that a code fix or a new functionality implementation hasn’t affected previously working functionality.

Sanity testing – Sanity testing is a type of testing that involves running of a subset of regression tests to ensure that a new fix hasn’t affected an already working functionality but in lesser time as compared to regression testing.

Read more about [Function testing](https://artoftesting.com/functional-testing)