Functional Testing: How To Add Value and Broaden Its Horizon

The scope of functional testing

The advent of such technological advances as AI, machine learning and a variety of automation tools has given rise to a general perception that functional testing is on the verge of fading away. But that is far from true. In fact with the new era of technology, engineers look forward to improving their skill sets by making use of functional testing 2.0.

What is functional testing?

The likely definition to crop up when searched for on the internet is that functional testing helps validate the functional features of the software. Thus conventionally functional testing included:

  • Requirement analysis,
  • Test case documentation,
  • Test execution leading to bug reporting, if any,
  • Retesting and regression.


While most people might think that functional testing has a limited scope, the fact is that the full scope of functional testing is yet to be experienced.

Improving the scope of functional testing

The scope of functional testing can be improved and made effective in terms of usability, security and performance with the help of certain relevant tools and techniques.

Some of the tools that can be used are:

  • Lighthouse: This helps enhance performance and usability testing. Such parameters like speed, responsiveness and stability of the app are tested so that the performance of the app could be enhanced. Usability testing is another key area of functional testing. Lighthouse can enhance the usability of the app in such areas as ease of navigation, image size ratio, the protocols used etc. The generation of the detailed automated report further helps testers to learn the app vulnerabilities.

  • observatory.mozilla: This website is extremely good for testing the basic security of a developed app. Testing can be done in detail and the report generated gives minute details of all the parameters tested.

  • Clickjacking test: Certain elements induce visitors to click on certain links wherein other unrelated links open up. This process is called Clickjacking. It is extremely risky since users might unwittingly download malware or other viruses. The Clickjacking test is a Chrome extension which helps detect such options, thereby bringing into prominence the app vulnerabilities for further remedial action.


Some important security check techniques that when incorporated, also enhance the value of functional testing. These can also be done without adding in any plugins and include the following tests:

  • Checks using Dev console: This tests to see if sensitive information is still available in the developer’s console, visibility of private IP codes etc.

  • Improper error handling: This technique is used to check if the error page result shows sensitive information by mistake.

  • Injection: Herein, the app is mostly tested for HTML queries and SQL queries which have the capability of destroying the database.

  • Broken access control tests: This tests to see how accessibility to the app is being provided. Not everyone needs to access all parts of the app. Thus this test checks to see if the proper controls are in place.


By incorporating diverse knowhow, it is now possible to increase the scope of QA, especially functional testing. This benefits developers by providing them with additional exposure and also sensitises engineers about other testing domains. Plugins, when used with functional testing, make it more effective. However, tools and techniques that do not use plugins can also be used.

Watch the video below to understand everything in more detail.

About the Author

QA InfoTech

QA InfoTech

Established in 2003, with less than five testing experts, QA InfoTech has grown leaps and bounds with three QA Centers of Excellence globally; two of which are located in the hub of IT activity in India, Noida, and the other, our affiliate QA InfoTech Inc Michigan USA. In 2010 and 2011, QA InfoTech has been ranked in the top 100 places to work for in India.

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