Functional Software Testing

FUNCTIONAL SOFTWARE TESTING is a type of software testing whereby the system undergoes testing against the functional requirements/specifications. It is a software testing process that we use within software development in which software undergoes testing to ensure that it conforms with all requirements. Functional testing is a way of checking software to ensure that it has all the required functionality that’s specified within its functional requirements.

Features undergo testing by feeding them input and examining the output. Functional testing ensures that the requirements are properly satisfied by the application. It is a type of testing that is not concerned with how processing occurs. But instead, with the results of processing. It simulates actual system usage but does not make any system structure assumptions.

Functional software training includes requirement definition and verification. It also includes design test cases and traceable matrix. Later on, execution of test cases and the management of defects. Next is an analysis of coverage and test planning. Lastly is the decomposition of functional.

Functional testing has many types

Regression testing

It is re-running functional and non-functional tests to ensure that previously developed, and tested software still performs after a change. Changes that may require regression testing include bug fixes, software enhancements, configuration changes, and even substitution of electronic components.

Usability testing

It is a technique used in user-centered interaction design to evaluate a product by testing it on users. This can be an irreplaceable usability practice since it gives direct input on how real users use the system. It shows more concern with the design intuitiveness of the product and tested with users who have no prior exposure to it.

Smoke testing

In computer programming and software testing, smoke testing is preliminary testing to reveal simple failures severe enough to, for example, reject a prospective software release. Smoke tests are a subset of test cases that cover the most important functionality of a component or system that we use to aid assessment of whether the main functions of the software appear to work correctly.

Sanity testing

It is a basic test to quickly evaluate whether a claim or the result of a calculation can possibly be true. It is a simple check to see if the produced material is rational. Also, it is to rule out certain classes of obviously false results, not to catch every possible error.

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Typically, functional testing involves the following steps:

*Identify functions that the software will perform.

*Create input data based on the function’s specifications.

*Determine the output based on the function’s specifications.

*Execute the test case.

*Compare the actual and expected outputs.

Functional testing is more effective when we create test conditions directly from user/business requirements. When test conditions are created from the system documentation, specifically system requirements or design documents, the defects in that documentation will not be detected through testing, and this may be the cause of end-users’ wrath when they finally use the software. Functional testing tests a slice of the functionality of the whole system.

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