How is Acceptance Testing Different from Functional Testing?

 


What is acceptance testing?

It is a testing method that is performed to verify whether the software product or application that has been built is aligned with the user and business specific requirements. 

It ascertains whether the system is able to satisfy the acceptance criteria or not. Customers, stakeholders and end-users are generally involved in conducting the software testing process.

 

Following are a few key types of acceptance testing:

1. User Acceptance Testing (UAT): It is a testing method wherein end-users are involved to test the software product or application in a real-time production environment. User feedback plays a key role in this testing method.

 

2. Business acceptance testing: It is a testing method that is performed to make sure whether the software product or application meets the business goals or not.

 

3. Contract acceptance testing: The acceptance test is performed only when the product goes live within the specified time period. The criteria is that all the acceptance use cases need to be passed accordingly.

 

What is functional testing?

It is a testing method that verifies whether every function of the software application is aligned with the specifications and requirements. The application’s source code is not taken into consideration by this testing method. 

Appropriate test input is provided to test each functionality of the software application and thus expect the output. The actual output is compared with the expected output. The functionality of the application under test is also tested accordingly.

 

Following are a few key types of functional testing:

1. Unit testing: In this testing method, individual pieces of code known as a ‘unit’ are tested. It ensures that each of these units is working as per the required expectations.

 

2. Integration testing: It is a testing method wherein two or more modules are combined and tested. The objective is to analyze how these modules perform and behave when they have been integrated.

 

3. Regression testing: Regression testing is a testing method that ensures the current functionalities of the application work as expected, despite introducing changes in the code or making new updates in the code.


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