Types of Functional Testing

    By Amy Montague, Wednesday 15 January 2020

    Read Time - 3 Minutes

    In this modern era of technology, most organizations conduct their businesses using readily available technologies such as websites and mobile applications. For customers to continue using these website and mobile applications, every aspect such as the speed and quality of the digital experience is vital. Testing, therefore, plays a crucial role in improving the quality, reliability, and performance of the system.

    Functional testing is built up of many different categories, all of which have their own benefits and requirements that aim to improve the digital performance and quality of your website or app. Here are the most common:

    • Unit testing: This is a type of testing performed by using scripts that test if individual components/units of an application match the requirements. Its purpose is to validate that each unit of the software performs as designed.
    • Smoke testing: Also known as Build verification. This is done after the release of each build to ensure that software stability is intact to ascertain the most important functions work.
    • Sanity testing: This is performed after smoke testing. It is done to verify that every major functionality of an application is working perfectly to validate that the bugs have been fixed and no further issues occur as a result of these changes.
    • Regression testing - This is defined as a type of software testing to confirm that a recent program or code change has not adversely affected existing features.
    • Integration testing: In Integration testing, individual software modules are combined and tested to evaluate the compliance of the system with specified functional requirements.
    • Usability testing: Evaluation of a product by testing it on real users in a production environment.

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    Process of functional testing

    When performing functional testing on your website or application, defining user and business requirements improve the effectiveness of your test as your test is carted to your personal business standards. This will allow you and your internal teams to understand what is required, and to gauge how a system behaves under certain conditions or using different inputs

    Typically, functional testing involves these 6 following steps:

    1. Identify the performance specification of the software
    2. Create input based on the function’s specifications
    3. Determine the output based on the function’s specifications
    4. Execute the test case
    5. Compare the actual and expected outputs
    6. Record your findings

    Advantages of functional testing 

    Here are some of the advantages of functional testing:

    • Improving digital performance
    • Risks associated with software use are reduced
    • Improves customer satisfaction
    • A guideline to ensure all requirements are met
    • Improves the security of the system which includes critical areas such as payment integration


    Functional testing has proven to be an effective process of testing systems and ensuring they are working as per the functionalities specified in the business document. It is, therefore, crucial to perform this process to guarantee user satisfaction.

    Want to explore Digivante's other website testing services. Check out our services page here.

    Amy Montague

    Amy Montague

    As one of the Marketing Executives for Digivante, Amy provides and reviews most of the copy and visual content for Digivante. Amy has a natural flair for the creative and introduces aspect into her marketing role.

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