Non Functional Testing Guide to Characteristics,Types,Requirements

Moreover, it helps you record your test scripts, tweak or edit them, and run them right from the browser. It automatically generates test reports in the form of charts or tables after every test. Check how quickly or easily the user is able to learn the application usage. Security is a fundamental feature due to which system is protected from cyber-attacks. For Performance Testing, a well-structured and clear specification about expected speed must be defined.

definition of non-functional testing

This is why functional testing might have priority during the testing process. However, contrary to common misconceptions, non-functional testing should often be performed at all test levels and done as early as possible. The late discovery of non-functional defects can be extremely dangerous for the success of a project.

All computers with various hardware settings are available in the laboratories. Each machine in the laboratory has a testable version of the software to be published, and a test suit is carried out. Ensure that in software engineering, quality characteristics are properly recognized. Non-functional tests should be measurable, so no subjective characterization such as good, better, nicer, etc., are available. Performance testing focuses on the ability of a component or system to respond to user or system inputs within a specified time and under specified conditions. Measures the extent to which any software system can handles capacity, quantity and response time.

Also, it analyzes the response of the system when more users operate the system simultaneously. Like JMeter, LoadRunner is also a performance and load testing tool to identify the system’s abnormal behavior quickly. It supports performance testing for a wide range of protocols and over 50 technologies and application environments. In addition, it helps you to quickly identify the causes of the performance issues with its patented auto-correlation engine. Moreover, this type of testing is equally important as functional testing.

Best Practices in Functional Test Automation

Developers perform smoke tests after each new build to ensure stability and to test critical functionality. Functional testing is concerned with testing if software functions properly and meets the user’s expectations. Functional testing in software testing is a way to determine whether software or an app works as expected. Functional testing isn’t concerned with how the processing occurs but whether the processing is delivering the correct results or has any bugs. Maintenance tests are used to assess the software application’s ability to readily be upgraded or altered to satisfy increasing user needs and requirements.

definition of non-functional testing

Load testing is a method that is performed during the software life cycle testing to guarantee software product stability and reliability. Functional testing can be an arduous, repetitive, and time-consuming process. The more you automate, the faster you can ensure desired functionality or identify and correct defects, and the more you save on test time and costs.

Recovery Testing

At Indium Software, we follow a process-oriented approach to ensure your applications are error free without any performance issues. To perform this test, the way in which the application is implemented must be evaluated, following good software engineering practices. The objective is to see if given certain volumes of data the application works normally, what are the maximum limits of data volumes for the operation and identify fault conditions. The volume tests consist of validating the operation of the application with certain volumes of data.

Compliance Testing verifies that the system or program was created in accordance with accepted practices, standards, and guidelines. Disaster Recovery Testing evaluates how well a system bounces back after crashes, hardware failures, and other major issues. Stress Testing involves pushing a system or component to or past the limits of its requirements. Basically, it evaluates how easy it is to perform the maintenance of a system or application. Among the security features of a system are confidentiality, integrity, authentication, authorization and availability.

Free automated functional test automation tools have many benefits, but they also have limitations. The testing tool should also be easily reusable for multiple tests and changes. There are a wide variety of functional test automation tools available. Thus, it is imperative to find the right tools to determine if your software is functioning as it should. Let’s look at what’s involved in performing functional testing in software testing. Sanity testing ensures that specific new functionalities from the build or bug fixes of the app or software system are working as they should.

In contrast, non-function testing verifies that the software conducts the processes correctly. Functional testing, typically performed manually, verifies that a program or app’s operational execution happens as set down by the business and technical requirements. Such an application passes functional testing only if every feature works correctly. System qualities including security, definition of non-functional testing stability, performance, maintainability, scalability, and usability are defined by nonfunctional requirements, or NFRs. Across all of the system’s backlogs, they act as limitations or restrictions on system design. Non-functional testing evaluates aspects of a program that don’t directly affect its functionality but are nevertheless important for the user experience.

Usability testing checks the degree of ease with which the end-users can learn, operate, and interact with the software product. Testing is an integral part of the software development life cycle which ensures the delivery of high-quality products. The ultimate purpose of testing is to guarantee that the final product is free of glitches, meets certain quality standards, and fits the specified requirements. WebLOAD Professional – Another performance testing tool that has various pricing plans, and like NeoLoad it comes with a free plan with a limited set of users. They have different pricing plans and one of them is free, but it comes with a limited set of users.

Non Functional Testing :Definition , Features and Types

The parameters of non-functional testing are never tested before the functional testing. Non-functional testing is done from a totally different perspective than functional testing. These types ofsoftware testing servicesare a means of quality control, which is performed in software applications to ensure that everything works well and to know in what circumstances they might fail. A good functional testing automation tool has the necessary tools to test functionality.

  • Non functional testing is a type of software testing for testing of non-functional parameters like performance, reliability, load testing, and software accountability.
  • This tool comes with an IDE that can seamlessly integrate with development environments.
  • Functional testing isn’t concerned with how the processing occurs but whether the processing is delivering the correct results or has any bugs.
  • The late discovery of non-functional defects can be extremely dangerous for the success of a project.
  • Functional software testing is an essential part of any software testing procedure.

The load test principle is to continually raise the software’s load until it reaches its threshold and then assesses its efficiency and behavior in connection with these load increases. Software system continuous performance for specified functions without failure. To check whether the system is compatible with various desired devices, operating systems, browsers, etc. Overall time consumption is less as compared to other testing processes. How does the software in question interface with other software systems?

Non-Functional Testing Automation Tools

Availability testing is, contrary to the available for operational demands, an approach for testing the embedded system testing. The new era of test automation is here, with 88% of organizations reporting that Artificial Intelligence is now the strongest growth area within test activities, in their quest for high quality. Run the test cases through the application and compare actual outcomes against expected results. If actual and expected outputs are different, the feature has failed the test and a defect should be recorded. The ease with which the user can learn, operate, prepare inputs and outputs through interaction with a system. There is no need to install this application since it can run directly in a browser.

definition of non-functional testing

It is a sort of non-functional test which is carried out to assess the capacity of the software or system to be modified without problems in order to satisfy the evolving requirements of the customer. Load testing focuses on the ability of a system to handle increasing levels of anticipated realistic loads resulting from the transaction requests generated by several concurrent users or processes. UFT Developer Shift-left functional testing using standard programming languages, IDEs, and testing frameworks of choice. Functional testers must have a deep appreciation of the end user’s thought process. There are often different types of users for each application (buyers, sellers, administrators, data entry clerks, supervisors, etc.). The different types of users and their typical navigation of the application must be taken into consideration for each test plan.

Functional testing tests ‘what’ the system does and Non-functional testing tests ‘how’ the system operates. Reliability test assumes that whether the software system is running without fail under specified conditions or not. If the system is failed under these specified conditions, reliability test will be failed. Testing is a vital part of an application’s development process, but before users can test an application, there must be something actually to test, and that’s where coding comes in.


Focus groups and consumer feedback are also used in non-functional tests, particularly when it comes to usability testing. Good automated functional testing tools are easy to use in a variety of environments, provide a variety of testing tools, and are reusable. Having a dedicated team of detail-driven people involved in automated functional testing is key to successful testing. You will want to choose detail-oriented team members with the right skill sets to perform automated testing. Determining who is better at manual testing vs. scripting and using automated functional testing tools is key to successful testing. In the field of software testing, an assessment under the banner of performance testing is one of the main elements which ensures the effective operation of a product after its launch.

Requirements of Non-Functional Testing

There is no secret that customers want the desired functionality in a particular software product, and hence, organizations make sure to meet those requirements through functional testing. Non-functional testing holds equal importance in the testing process as functional testing. Sometimes, the project manager, QA team and even the client focus only on functional aspects of the software. Specialized tools help model a real-life environment and see how the software will behave under pre-set conditions.

A good example of a non-functional test is seeing how many users would sign into a program at the same time. The term refers to the ease with which the application can work in different hardware and software configurations. The software testing professional must devise a plan for gathering client expectations and provide a series of tests to evaluate how satisfied they are.

Under these types of testing, you have multiple TESTING Level’s, but usually, people call them as Testing Types. You may find some difference in the above classification in different books and reference materials. The flexibility of software to transfer from its current hardware or software environment. Optimize the way product is installed, setup, executes, managed and monitored. An excellent example of non-functional test would be to check how many people can simultaneously login into a software. To develop and expand current technology and product behavior knowledge.

Functional testing ensures that the software works as expected, while non-functional testing determines how well the software works within different parameters. Scalability testing is a form of performance testing which guarantees the software product or application’s flexibility to increase in proportion to growing requirements for end-users. The volume tests subject the software product to or burdened with enormous quantities of data in order to measure and evaluate the application response, behavior, and effectiveness. ‘ Volume Testing ‘ relates to the testing of software applications, which are subject to elevated information volumes. Load testing is the simplest form of performance testing and is carried out under a particular predicted load condition for understanding the behavior of the software or application.