Functional vs. Non-Functional Testing: Understanding the Difference

Issac Glantz
By Issac Glantz 5 Min Read
understanding difference between functional and non functional testing

Functional testing revolves around the functionality of an app or software. It is based on the client’s needs and how they wish for clients to experience their app. A Requirement Specification or software specification is an excellent guide for testing the app.

The software is tested in a real-life environment. The goal is to determine if the actual result is consistent with what is expected.

Non-functional testing is more complex. It focuses on issues like the performance of an app and the quality of the software. Quality is mainly determined by correctness, accuracy, durability, and correctness. When apps work smoothly, efficiently, and according to user expectations, it is considered reliable.

Functional Types of Testing

There are various kinds of functional testing strategies. The surest way is to merge manual and automated functional testing strategies.

Here are a few functional tests that could help.

Smoke Testing

Smoke testing is conducted before the actual test. Its main purpose is to establish that the primary functionalities work fine. A smoke test is essential before other testing procedures are fine-tuned.

Integration Testing

Integration testing seeks to find out if multiple software components work together. All parts have to work seamlessly together and individually.

Sanity Testing

Once functionality has been added or a bug has been fixed, sanity testing will help ensure that the change hasn’t triggered any issues.

Interface Testing

Interface testing checks if users will interact with the interface as planned. You need to gather an end-user group to conduct this test. The group should perform specific tasks.

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Interface testing will help you identify software elements that the user interacts with often. It can help you determine if the elements are acting as they should. The primary purpose of usability testing is to determine if the app will be helpful and convenient for the end-users.

Boundary Value Testing

When a software system enforces limits on the input data, you must check that the functionality stays the same. If, for example, the password field needs to include a minimum of eight characters, it should stay the same.

Globalization Testing

Modern organizations try to design products that can compete internationally. Globalization testing validates the accessibility of a product in foreign markets.

Non-Functional Types of Testing

Non-functional testing types are just as crucial as functional types. They include:

Availability Testing

It is essential to test the frequency with which products will be used and if they are accessible to users that need them. For example, you may wish to reduce the chances of failure or determine the time that repairs take before the system is operational again.

Scalability Testing

This procedure ensures that your product can grow in consistency with the increasing demand of end-users.

Performance Testing

This test aims to find out if the app or site works well under the workload it is projected to receive.

Compatibility Testing

This test aims to validate that a product can operate seamlessly with other products. They include hardware, OS, browsers, and more.

Disaster Recovery Testing

This test is used to determine the amount of time it would take to recover. It also tests the software’s ability to manage recovered data following a network blackout or crash.

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Maintainability Testing

Maintainability testing tests a program’s ability to go through updates and changes safely. The testing determines the ability of your app or software to deal with changes.

Functional and non-functional testing methods are equally important. They both help you confirm the functionality of your software. With the right tests, you can ensure that the software or application does what it is supposed to do. They check for both quality and functionality.

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I'm Stuart, a tech enthusiast and experienced writer. I've worked with multiple tech blogs over the years, leveraging my 8 years of digital marketing expertise. My journey began when I was searching for ways to make money online and stumbled upon blogging. Back then, starting a blog on Blogspot was the norm. Aspire to be one of the best bloggers in the world, I've witnessed how the age of the internet has revolutionized technology journalism. In this era of social media and video marketing, it's essential to recognize the importance of reading articles to gain in-depth knowledge and insights. Let's explore the fascinating world of tech together!
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