Types Of Software Testing

Types of software testing: Different testing types in details. Are You Ready to Explore the Different Types of Software Testing?

We, as testers, are aware of the various types of Software Testing like Functional Testing, Non-Functional Testing, Automation Testing, Agile Testing, and their subtypes, etc.

Each of us would have come across several types of testing on our testing journey. We might have heard some, and we might have worked on some, but not everyone has knowledge about all the testing types. Each type of testing has its own features, advantages, and disadvantages as well. However, in this tutorial, we have covered mostly each and every type of software testing which we usually use in our day-to-day testing life.

Let’s have a look at them!

Table of Contents


There are four main types of functional testing.

Unit Testing

Unit testing is a type of software testing which is done on an individual unit or component to test its corrections. Typically, Unit testing is done by the developer at the application development phase. Each unit in unit testing can be viewed as a method, function, procedure, or object. Developers often use test automation tools such as NUnit, Xunit, JUnit for the test execution.

Unit testing is important because we can find more defects at the unit test level.

For example, there is a simple calculator application. The developer can write the unit test to check if the user can enter two numbers and get the correct sum for addition functionality.

Integration Testing

Integration testing is a type of software testing where two or more modules of an application are logically grouped together and tested as a whole. The focus of this type of testing is to find the defect on interface, communication, and data flow among modules. Top-down or Bottom-up approach is used while integrating modules into the whole system.

This type of testing is done on integrating modules of a system or between systems. 

For example, a user is buying a flight ticket from any airline website. Users can see flight details and payment information while buying a ticket, but flight details and payment processing are two different systems. Integration testing should be done while integrating of airline website and payment processing system.

System Testing

System testing is types of testing where the tester evaluates the whole system against the specified requirements. It involves testing a complete application environment in a situation that mimics real-world use, such as interacting with a database, using network communications, or interacting with other hardware, applications, or systems if appropriate.

For example, a tester is testing a pet insurance website. End-to-End testing involves testing of buying an insurance policy, LPM, tag, adding another pet, updating credit card information on users’ accounts, updating user address information, receiving order confirmation emails and policy documents.

Acceptance Testing

Acceptance testing is a type of testing where client/business/customer test the software with real time business scenarios. The client accepts the software only when all the features and functionalities work as expected. This is the last phase of testing, after which the software goes into production. This is also called User Acceptance Testing (UAT).


There are four main types of functional testing.

Security Testing

It is a type of testing performed by a special team. Any hacking method can penetrate the system. Security testing is done to check how the software, application, or website is secure from internal and/or external threats. This testing includes how much software is secure from malicious programs, viruses and how secure & strong the authorization and authentication processes are.

It also checks how software behaves for any hacker’s attack & malicious programs, and how software is maintained for data security after such a hacker attack.

Performance Testing

Performance testing is testing of an application’s stability and response time by applying load.

The word stability means the ability of the application to withstand in the presence of load. Response time is how quickly an application is available to users. Performance testing is done with the help of tools. Loader.IO, JMeter, LoadRunner, etc. are good tools available in the market.

Usability Testing

Usability testing is testing an application from the user’s perspective to check the look and feel and user-friendliness.

For example, there is a mobile app for stock trading, and a tester is performing usability testing. Testers can check the scenario like if the mobile app is easy to operate with one hand or not, scroll bar should be vertical, background colour of the app should be black and price of and stock is displayed in red or green colour. The main idea of usability testing of this kind of app is that as soon as the user opens the app, the user should get a glance at the market.

Compatibility testing

This is a testing type in which it validates how software behaves and runs in a different environment, web servers, hardware, and network environment. Compatibility testing ensures that software can run on different configuration, different databases, different browsers, and their versions.


The above-mentioned Software Testing Types are just a part of testing. However, there is still a list of over 100+ types of testing, but we do not use all testing types in all types of projects. Hence, we have covered some common Types of Software Testing which are mostly used in the testing life cycle.

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