Functional and non-functional testing: The basics you should know | TestFort Blog

Functional and non-functional testing: The basics you should know | TestFort Blog

There are a lot of testing practices to make sure that your solution works correctly and can be used easily across multiple environments and platforms.

Testing is an essential part and success factor of the software development process. If the test management is carried out correctly, tests can help to avoid software errors and ensure a high quality of the product. There are a lot of testing practices to make sure that your solution works correctly and can be used easily across multiple environments and platforms. These methods are usually divided into functional and non-functional tests.

Functional testing and non functional testing: What is that all about?

Functional testing is a type of testing that focuses on the business requirements of the software product. The main idea behind functional testing is to ensure that each functionality of software works as specified in the requirement documents. These types of tests focus only on checking the results of operations, completely bypassing the intermediate states of the system during their execution. Functional tests chiefly involve black box testing techniques, where you don’t peer into internal code structure and rely mainly on specifications.

Non-functional testing is a testing technique that focuses on the evaluation of the non-functional aspects of the system. It checks the parameters that are not tested in functional tests, such as performance, usability, reliability, etc. Non-functional tests are as important as functional tests as they help to understand how the system works. The main goal of this type of testing is to provide the best experience to the end-users of the software product.

Since functional testing tests is a methodology that examines various parameters of a software product, different types of functional tests are performed. Let’s have a look at some of them:

Unit testing is the first level of testing which is usually performed by developers. This process ensures that individual components of a software are functional at the code level and react as expected. Unit tests can be performed manually, but automating the process speeds deployment cycles and extends test coverage.

Integration tests are designed to determine if independently developed components of software work properly when they are connected to each other. Integration tests ensure that communication between different units runs smoothly. Those tests try to uncover different types of errors such as incompatibilities in the message or data formats as well as invalid input or output parameters that can suddenly shut down a function.

System testing is a black-box testing method that evaluates a complete and integrated software product. The objective of system tests is to verify the system’s compliance with the specified requirements. This type of testing is usually performed by a test team other than the development team before the product goes into production.

User acceptance testing, sometimes called application testing, is the last phase of the functional testing which is performed before the software product is released to the market. The goal of this process is to ensure that the software is ready for the delivery and meets the end-users needs. This, in turn, requires the product to be tested in the “real world” – by end-users through the beta testing process.

The non-functional tests are an effective supplement to the functional tests as they provide important information on the safety, serviceability, and reliability of the system. This type of testing checks how the software product works and includes (but is not limited to) the following types:

Reliability tests
Reliability tests check if the software can maintain a certain performance level under certain conditions over a certain period of time.

Robustness tests
Robustness tests are designed to prove that the system works correctly under all conditions, even during unexpected events.

Stress tests
Stress tests monitor the system behavior under not typical circumstances, for example, under a heavy load.

Performance tests
Performance tests are conducted to determine how the software works in terms of responsiveness and processing speed under a workload.

Load tests
Load tests are the tests that are used to evaluate the behavior of the system under a specific load.

Usability tests
Usability tests are designed to verify if the software product can be easily used by end-users.

Maintainability tests
Maintainability tests are conducted to evaluate the software’s ability to meet the users’ requirements and be changed without any issues.

Portability tests
Portability tests measure how easily the software can be transferred to another environment, for example, how easily mobile apps can be moved to different operating systems or various devices.

Both functional and non-functional testing in software it is designed to deliver the product in line with the customer needs. The main difference between functional and non-functional tests is that functional testing is run to ensure that the software meets the particular requirements, while non-functional testing is focused on how well the system works.

This is best illustrated by the following example. Under functional testing, you can verify if the login functionality works as intended. For instance, you can check if entering the username and the password allows you to log into the account on the website. And with the help of non-functional tests, you verify if by entering the same data you can log in to your account within 2 seconds. Checking how many users can log into the system simultaneously is another example of non-functional testing.

Secondly, functional testing is often aimed at detecting and eliminating bugs in the software so it can meet the business requirements perfectly. At the same time, non-functional testing is concerned with the user experience and behavior but not with “bug hunting”.

The third difference refers to the criteria on which functional testing and non-functional testing are based. Under functional tests, both valid and invalid operations are performed in order to test the behavior of the software both in desired and unexpected conditions. On the other hand, while running non-functional tests you need to consider the parameters that are not considered while performing the positive and negative functional tests. There is one more distinction between the two types of tests – the functional tests are performed before the non-functional tests.

Need to outsource testing? Here’s how you find a team! | TestFort Blog

Need to outsource testing? Here’s how you find a team! | TestFort Blog

If you’ve made the decision to outsource testing, you’re already on the right track. Next step: finding a team.

At the most basic level, your requirements for a software testing outsourcing company will revolve around budget, qualifications, availability, and process management. The right choice will influence the company plans to deliver a new product to the market in a short time. Efficient cooperation will lead to a high level of services and expertise of each remote team member.

How to find a reliable remote company? How to make the right choice? We’ve prepared a short guide for you on what to do to find a good QA company.

An essential factor of working with QA outsourcing companies is their location.

Time zone differences will dictate when and how you communicate.

Overall development culture will determine whether your remote testers gel well with your in-house developers.

Finally, the country’s economy and infrastructure will dictate the cost of working with your outsourcing partner.

Working with partners from Eastern Europe provides the best balance of all three factors.

Costs of testing in Eastern Europe are significantly lower than those in the EU and US, while the QA engineers themselves can sometimes outperform western competitors. All countries in Eastern Europe are easy to travel to, and the time difference is seldom a problem. There are always at least 2 hours of overlap between Ukrainian testing companies and the Silicon Valley, while with Polish companies that overlap is increased to 3 hours.

The most appealing advantage is a big number of IT experts in this location. You will find a solid number of software testing outsourcing companies in Ukraine and neighbouring countries. By the way, Ukraine was recognized as the “Offshoring Destination of the Year” by Global Sourcing Association (GSA) in 2017.

Here are the primary steps to choosing a remote QA company:

Check their portfolio: If the company has worked over similar projects that you have, used technologies that you are interested in, you can add it to the list of candidates for further consideration.

Check hourly rates: You will pay more for the QA services if you work with a team from the US than from Eastern Europe. The cost shouldn’t be the only criteria for making a decision but it’s worth thinking about.

Years on the market: If the company has been providing QA services for a few years, you can add it to the list of reliable companies.

Flexibility: It’s good to communicate with the company representatives and find out if they can adapt to changes if they appear. And it’s good to know if there’s a possibility to scale the team up or down depending on the project development flow.

References and reviews: You can read about the chosen companies on sites like Goodfirms or Clutch. You will get good or bad reviews from real clients.

Qualification: Before you start cooperation with any of the QA companies, it’s good to find out if the team has any certificates (for example, ISTQB).

There are several engagement models that outsourcing software testing companies offer. We’ll talk about the most popular ones.

Dedicated team. You expand your engineering capacity with this team. And you have a group of people that is focused only on your project. It means that they work full-time and the team size can scale up with time if required. This type of cooperation is good for long-term projects. Such QA companies can call themselves technology partners.

On-demand team. It’s the best option for short-time projects where you need one or a few QA engineers for a few weeks or months. This model requires thorough planning from your side and dividing the tasks into small chunks for the most efficient workflow. In this case, remote companies can pick up new QAs for every new project.

A good remote team will offer you a high level of communication. It means you receive answers in a short time and you get a full description of your future cooperation. When you have found a few companies that have qualified and ready-to-work engineers, communication quality can become the thing that will influence your choice.

We’re here to assist you with the search for the best QA company that will deliver high-quality services. We know such teams in Ukraine and we can give you its name. Just drop us a message and let us help you.

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