These tools include proxies, packet sniffers, vulnerability scanners, and other tools used by hackers. The IT department sometimes makes some of these tools available to the software tester. The test or development team uses some of these tests in both functional and non-functional software testing phases. This testing aims to check whether the product conforms to a predefined set of requirements and can perform its required functions under specific conditions. It’s usually the last testing stage, after unit and integration testing. You perform system tests with real or near accurate data with realistic interdependencies in the system under test as described in system requirements specification .

Global Non-Destructive Testing Market Size To Exceed USD 32.42 … – GlobeNewswire

Global Non-Destructive Testing Market Size To Exceed USD 32.42 ….

Posted: Wed, 26 Apr 2023 07:00:00 GMT [source]

Survivability describes how a software system responds in the case of failure to function, and survivability testing ensures that if errors and failures do occur the system can recover itself. User-friendliness is very important because it determines how satisfied users are with your software and ensures that users are capable of taking full advantage of everything your software offers. There are many benefits to carrying out non-functional testing, and non-functional testing is an essential step in system testing. It’s always important to test non-functional aspects of software unless they have already been tested and found to be adequate.


You can capture the non-functional requirement with technical or user stories. Whether you capture non-functional requirements in the form of a user story or any other requirement, both remain the same. The major difference between a technical story and the user is that the user story would require discussion and consist of visibility. Here we discuss Non-Functional testing Types, Requirements, process,es and Characteristics of non-functional testing.

non-functional testing methods

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. It refers to a portion of the software system that can be converted for use in another application. The flexibility of software to transfer from its current hardware or software environment.

What Are the Different Types of Testing?

Coding standards are a crucial aspect of any software development project, helping to create cleaner, more readable, and more efficient code… Security testing can range from automatic scanning to periodic penetration testing, depending on the software’s level of exposure to potential threats. In penetration testing, every way an application can be compromised (cross-site scripting, unsanitized inputs, buffer overflow attacks, among others) is exploited to check how the system handles it. Unit tests are very low level and close to the source of an application.

Seek out a tool that permits automated API and component testing, especially in the early phases of the development cycle. These tests provide a clear, accurate, and impartial view of how users interact with your product or website. To prevent whatever emotional investment your software team had during the product’s development and design, the usability test is conducted on a test sample of users. It’s crucial to implement usability tests to prevent confusing and unintuitive interfaces. Stress tests check the software’s viability above the maximum supported load.

Types of errors and bugs detected

Also Non-functional testing should be expressed in a testable way not in a manner which is not testable. Unlike Functional testing, to make the non-functional testing effective, it is important to use testing tools rather than testing it manually. Functional testing is mainly concerned with testing a software’s behavior under test. This what is non-functional testing means we build a set of test cases, and we examine if the software is responding with the expected output. These tests are done in real environments to guarantee that the actual result is synchronized with client demands. This type of testing mostly consists of Black-box testing and is unconcerned with the application’s source code.

non-functional testing methods

The team of testers can produce a product that meets the demands of the customer and provides a certain service with the help of this method. So, in this article, we have seen What is Non functional Testing, Characteristics of Non functional Testing along with its types and requirements. When it comes to types, testing processes can fall under either functional or non-functional. Functional testing covers functionality and features of the application, while non-functional testing evaluates a wide range of other factors.

Mobile Testing Advisor

Today, regression testing is essential as applications and software are developed almost daily. This means code is changed regularly and testing must be performed just as consistently. To make the most use of manual testing, it is important to test manually in areas that really need it. No matter which tool you use, it is next to impossible to determine how users feel about your software and user behavior. Non functional testing verifies the readiness of a system according to nonfunctional parameters (performance, accessibility, UX, etc.) which are never addressed by functional testing.

  • This testing tests the characteristics of the software for example, like say the speed of the response, or the time taken for the software to perform any operation.
  • A function ought to produce the same outcome for which it was designed.
  • Compared to other testing procedures, there is a smaller overall time commitment.
  • Functional testing is done using the functional specifications provided by the client or by using the design specifications like use cases provided by the design team.
  • Ensure that in software engineering, quality characteristics are properly recognized.
  • If you’re new to this field or want an in-depth look at non functional testing and how it can apply to the products you develop, keep reading.

Non-functional testing is a complex job that involves considering a software build from all angles and perspectives. Tsung is completely free and it can help testers to ensure that the software they’re working on offers high-performance levels under a variety of challenging conditions. For example, basic security testing might take place because adequate security is considered extremely important in modern software. The earlier you identify high-risk defects, the lower the potential impact of those defects can be other aspects of the system. Before you start non-functional testing, make a list of all the aspects of the system that you need to test and prioritize them based on urgency and importance. Developing a strategy can help you to optimize your non-functional tests from the outset.

Best practices for non-functional testing

Ultimately, functional testing and non-functional testing coexist, but the depth of coverage varies. There isn’t a universal definition of functional testing and non-functional testing. Don’t wait until the last moment to get non-functional testing covered. You need to prepare a separate artifact to manage the non-functional requirements. This can help you develop a better idea of what you need to test and how you can do it in different iterations.

non-functional testing methods

Automated non-functional testing is carried out by automated scripts and testing tools. When using automated testing methods, testers can conduct tests in the background while getting on with other tasks, once the automated tests have been initiated. Unit testing, integration testing, and API testing are all forms of functional testing. Both functional and non-functional testing are important types of software testing that can help testers and QA teams to assess whether an application meets its current requirements. The difference between functional and non-functional testing is in what they test.

Unit testing

Localization testing verifies the application works well in different locales. Localization testing aims to test the content and graphical user interface of the application and determine if it is ideal for a specific region or not. Compatibility testing lets you validate if the application or product is compatible with different devices, browsers, and operating systems, all at widely different configuration strengths. It determines efficiency, velocity, reliability, and other essential system components. Moreover, two or more applications can be compared, and their information transfer rate, bandwidth, system velocity, and other factors are evaluated. Tests non functional aspects, such as reliability, usability, and performance.