The types of software testing | Agilitest blog

3 min readDec 19, 2022


Software testing is one of the most critical steps in the Software Development Life Cycle (SDLC), as it allows companies to comprehensively assess whether their software product meets its functional and non-functional requirements. The objective of the testing phase is to identify and resolve all bugs and errors in the product before it is released to the market. In most cases, software testing remains a constant phase throughout the SDLC and is performed by testers. In this blog, we will discuss the different types of software testing and their role in the development process.

Types of software testing

Software testing can be divided into two different types: functional and non-functional testing.

Different aspects of a software application require different types of testing, such as performance testing, integration testing, unit testing and so on.

Each of these types of software testing provides excellent visibility into your application, from code to user experience. Let’s take a closer look at some of the most common types of software testing.

Functional testing

Functional testing aims to verify the functionality of the application against a set of requirements or specifications. Functional testing often includes testing portions of the underlying code.

Unit testing

When creating software applications, you may want to make sure that a particular function works properly. You may want to check that it creates the right object or returns the right information. This is where unit testing comes in.

Unit testing involves testing a very specific part of your application on its own, to ensure that it produces the right result. Typically, this involves isolating the function and making sure that it works well on its own. When you write unit tests, you can think of them as zooming in on a part of the program to make sure it works as expected.

Integration testing

During integration testing, the individual units of the product are tested as a group.

The objective of integration testing is to ensure the correctness of the correspondence between all components. Therefore, when all the parts or modules work independently, we need to check the flow of information between the dependent components, which is called integration testing.

Smoke Testing

Smoke testing is the type of software testing that is carried out during the initial construction of the software. It ensures that all critical program functionality is resolved and that the programs operate efficiently. Smoke tests can be performed manually or in an automated manner.

Smoke tests are the subset of acceptance tests, and the main purpose of these tests is to validate the stability of the new version so that it can be subjected to more rigorous testing.

Sanity Testing

Sanity Testing is the type of software testing that is performed after a software build is received with changes in functionality and code. Sanity testing is performed in order to assure that the bugs have been fixed and that there are no other bugs that originated with the new changes.

Sanity testing doesn’t focus on core functionalities, but it rather focuses on verifying the rationality and correctness of the software.

The main objective of sanity testing is to ensure that there are no bugs or false results in the component processes.

Regression Testing

A regression test is a kind of app test to detect if the software still functions after the current code has been modified or changed. It is a crucial part of the software development and testing life cycle, allowing developers to constantly enhance the software without unfavorably affecting its functionality.

This form of testing is performed to ensure that the newest problems are not introduced through bug fixes.

User Acceptance Testing

UAT is an essential step in software development and testing, as it directly involves the software’s intended users or clients.

Unit Acceptance Testing (UAT) is a phase of a software development life cycle where the client or user tests the software to determine whether the software performs, behaves or is built according to their requirements.

Non-Functional Testing

Load Testing

Load testing is just the concept of testing a given software’s ability to withstand the load, i.e., concurrent users. It refers to a kind of performance testing that determines the performance of the systems under real-life load conditions. This testing helps determine how the application behaves when accessed by multiple users simultaneously.

Stress Testing

Read full article here. An article by Jolivé Hodehou.




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