Non Functional Testing With Non Functional Test Examples

Loadster is used to test loads of websites, web applications, and APIs. It is an integrated environment that you can use to run stress tests. It gives the ability to record when you edit the script and allows you to get the test results after execution.

  • These tests are quick to execute and easy to modify when the code requirements change.
  • Functional testing suites are the more strictly necessary of the two categories.
  • Safety from external and internal security threats to protect information & data- confidential or nonconfidential.
  • Align your accessibility tests with your test cycle and sync your results all in one place with Perfecto’s test reporting.
  • Tricentis Neoload makes it easy to create and execute automated non-functional tests.
  • Upgrade and installation testing verifies that the software works as expected.
  • Helps in providing an effective performance for the software application or product.

Help users fall in love with your mobile app with our texting expertise. Inna is a content writer with close to 10 years of experience in creating content for various local and international companies. She is passionate about all things information technology and enjoys making complex concepts easy to understand regardless of the reader’s tech background.

Examples of non-functional tests

The distinction between functional and non-functional testing is there not because these two types of testing exist independently from each other. For most of them, what matters is the result of testing, which is a software product that is free of bugs, vulnerabilities, and inconsistencies. In addition, the performance testing tool supports 100% Javascript desktop applications and tests the functional performance of web applications. It is performed to assess an application’s performance under common situations. It’s a methodology that incorporates distinct testing methods to test the requirements for scalability, reliability, stability, and other aspects of software product quality. This contrasts with white box testing, which tests the way the system works internally.

Non-functional tests can measure each of these metrics quantitatively, with lower numbers generally implying higher levels of usability. This is also a key part of scalability testing, particularly if you want to increase the number of users on the app in the future. Non-functional testing also verifies how the system works when errors occur, such as security errors, validation errors, and configuration errors. When you define the requirements of your software before non-functional testing begins, make sure that each requirement is objective and measurable. If you’re writing test cases for non-functional testing, they might look something like the non-functional testing examples below.


Availability testing — Tests how often the app is accessible and readily available for use. You’ll be able to trace your test results backward to your requirements, and forward to issues and defects – ultimately enabling end-to-end traceability. Performance Testing eliminates the reason behind the slow and limited performance of the software. Allows you to evaluate your design on many screen widths for a “real” test of “adaptivity” instead of predefined screen widths. Test for responsiveness by DesignModo You can adjust the screen’s width after entering the website’s URL to watch how your user interface adapts to accommodate it in real time. A smooth experience on various digital devices is the main objective of evaluating responsive websites.

definition of non-functional testing

Maintenance tests are used to assess the software application’s ability to readily be upgraded or altered to satisfy increasing user needs and requirements. The approach document before you conduct non-functional testing has to cover the test scope, test metrics, testing tools, important dates, and deliverables. Even though this testing doesn’t impact the business directly on the functionality aspects, you can amplify the user-friendliness and user experience to the next level. Non-functional requirements can also help you capture the user behavior when many people use the software or system simultaneously. Most of the time, the servers might be unavailable or busy, thanks to heavy load. The best example is a college website where exam results are obtained.

Parameters to be tested under Non-Functional Testing

There is no standardized set of functional or non-functional tests that need to be performed on the product. In every situation, the scope of testing is defined by the factors we have talked about earlier in this article. However, in most cases, QA engineers run both functional and non-functional tests on a software product. This is done to make the testing process comprehensive and effective, which will result in a thoroughly tested product with a minimum probability of failure.

With the help of unit testing, a QA engineer can get as precise as possible when testing a newly created or recently updated software product. Unit testing deals with the smallest fragments of code and can be both manual for maximum precision or automated for maximum efficiency. You can test the performance of your application under normal and excessive what is non-functional testing load by simulating the HTTP requests to ensure that critical services and information are available at an optimal speed. Use this tool to develop application infrastructure and to run successful websites permanently. Scalability testing refers to testing an application in a way that assesses how it performs when the number of users is scaled up or down.

Software Testing

In some cases, the system might crash and yet still pass the test case you’re working on, for example, if the system withstands the required amount of stress or traffic before crashing. ● Manual testing can be used to carry out system testing in scenarios where it’s impossible to automate. In other cases, it may mean that particular error messages occur to notify the user of the problem and recommend a solution.

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The functional requirements, NFRs, and design constraints define the system’s scope and quality. By understanding both NFRs and design constraints, teams can make more informed decisions about the system’s design, ensuring that it meets the needs of the stakeholders while adhering to any limitations. This form of testing can be used to check whether an application delivers the same output consistently over a specified duration.

What is Non Functional Testing? (Types)

Optimization of how you install, set up, manage, execute and monitor the product. Detection of product behavior problems under simulation of different operations. To improve and enhance knowledge of the product behavior and technologies in use. To collect and produce measurements and metrics for internal research and development.

definition of non-functional testing

While functional testing ensures that software carries out its key functions, only non-functional testing actually tests the reliability and repeatability of these results. Software teams must allocate time and budget for frequent non-functional testing, and software developers will have to pay extra for this additional testing. Non-functional testing is usually carried out by testers in the QA environment, but sometimes developers may carry out non-functional testing during development. By checking the non-functional parameters of the software build, it’s possible to reduce the costs of releasing the product because the need for further development and software changes later is reduced.

Experience Non-Functional Testing in Action

Optimize the way product is installed, setup, executes, managed and monitored.