What is Functional Testing?

Test to ensure that the changes, processes and outcomes are consistent with the specification or expectation. This level of testing is concerned with the whole system, not just small pieces or units of code. A common way of differentiating between unit testing and functional testing is to ask whether the order of the tests matters. If the order matters, the test is part of functional testing.

Functional testing is often done as black-box testing where the testing ignores the internal mechanism of the system or component and focuses solely on products generated in response to certain inputs and executed. There are many commercial products and free support that the functional tests.

Functional test cases are derived from the functional requirements of software and are the basis of the test system. This is to help you test if the feature is necessary for the specification and the result is correct.

When to start

Functional tests are defined and executed when the units of the application are considered complete. If portions of the application is amended after the trial started, the test is generally considered valid and must be repeated. White box testing slightly relaxes this requirement, in that the tests are known to be affected by the change of code can be considered as still valid.

When the code or environment is changed, the functional tests are repeated. Automated functional testing allows a reliable repetition of all tests.

This test phase of software development is often shrift by developers and IT managers. However, this testing is the only way to determine if the application is working properly before being deployed.

Functional testing covers how the system executes the functions it is supposed to run commands, including the user, data manipulation, research and business processes, user screens, and integrations. Functional testing covers the obvious surface type of functions, operations and back-end (such as security and how the updates affect the system).

Prithwiraj invites you to visit http://SoftwareQAtestings.com/ which is a community of 7000+ software testers. Here you can find 1000+ free Software Testing and QA Tutorials, testing tools download, discussions, news etc. Get Expert Advice on Software Testings within 24 hours from this site for FREE!