Functional testing is one of the Black-box testing types as the application source code is not counted during the process of testing. The primary purpose of this form of software testing is to test every functionality of the application by giving specific inputs and verifying the outputs upon the functional requirements.
Simply it is a form of testing that verifies whether the software operates as per user expectations. Functional testing is also identified as specifications-based testing as this testing type entirely depends on the specifications of the program. QA engineers mainly focus on validating the system upon the functional specifications and verifies the features upon user specifications.
Why Functional Testing is Essential?
Functional testing is essential in validating the functionality and quality of the software through this testing QA teams test the software functionality based on the Software Requirements Specification (SRS). It assures the system performs as per the specifications of the user. This testing method is used to test specific error conditions, usability features, accessibility features, and other vital software functions.
Various Types of Functional Testing
> Component Testing
> Integration Testing
> Regression Testing
> Smoke Testing
> Sanity Testing
> System Testing
> User Acceptance Testing (UAT)
> Unit Testing
Steps Involved while Performing Functional Testing
• Understanding the business requirements completely
• Preparing an advanced test plan
• Creating functional test cases by including test data, test input and output
• Creating input data as per our requirements
• By using test input data, we need to execute the test cases
• Comparing actual test output with the expected output by using result validation
• Identifying the Log defects which is the actual difference between actual test output and expected output
Popular Tools used in Functional Testing
One of the most popular open-source automation tools meant for functional testing of web applications is Selenium. There are various components embedded in this suite to manage several automation testing attributes. Selenium tool supports several operating systems and browsers. It also provides a playback tool for monitoring functional tests and runs on various operating systems like Linux, Windows, and Mac.
Sauce Labs is the biggest scalable automation cloud for web, mobile, and hybrid applications. It is a secure platform that supports the firms to improve their development cycles that helps to enhance the quality of the software.
Advantages with Functional Testing
Functional Testing Gives a Great Satisfaction for End-users
Functional testing ensures that the software gives satisfying performance for the end-users. The users will get the easy-way-out through using the application.
Functional Testing Ensures No Defect Software
Once the specific software goes through the phase of functional testing, all the errors and bugs will be identified and then removed to streamline the functions of the software. So, you will get no defect software that is free from errors and bugs.
Functional Testing Gives Better Security
The attributes of functional testing will also look at the software security aspects. It will give a clear decision of whether the application is secure or not for storing the users’ sensitive data.
Functional testing is an essential job in the software development process. Without this testing, the software may not perform well. Hence, the developer needs to ensure that there will be no errors and bugs in the application before it is going to launch. The functional testing method results in delivering quality software that ensures end-user satisfaction