Differences Between Acceptance Testing vs. Integration Testing

Integration testing focuses on ensuring various components within a program or system can function together well. Acceptance testing focuses on the client’s use of the system and how it functions as a whole unit, rather than on the specific interaction between different aspects.

System Integration Testing (SIT): To better understand SIT, we must first understand what system integration is. As the name suggests, system integration refers to a series of steps where different components are combined into a single unit. These units then undergo integration testing, which is the grouping of component interactions that are tested as part of integration testing.

From a different perspective, system integration testing, or SIT, is viewed as combining integration testing and system testing. At this point, we know what integration testing is. We now need to understand what system testing entails. System testing is the testing carried out on the absolutely integrated products to verify system compliance with predetermined requirements on functional and non-functional elements.

Functional Testing | Unit Testing | Integration Testing | Acceptance Testing | System Testing

What is integration testing?

Integration testing is the process of evaluating how well various system components work together. Smaller pieces of a larger software are individually created by engineers during the software development process. Integration testing enables engineers to assess whether they are capable of processing and transferring data adequately when it comes time to connect those various aspects. Libraries, dependencies, and databases are some elements of a software or system that a developer may evaluate during integration testing. There are different approaches to conducting integration testing, including:

What is acceptance testing?

Software testing that focuses on client requirements and whether the system or software satisfies them is known as acceptance testing. Acceptance testing’s goal is to make sure the software meets users’ requirements. Before going into production, software developers typically conduct acceptance testing near the end of the development process. Within the project’s contract, the client and development team typically define the acceptance testing process. There are two methods for acceptance testing:

Differences between acceptance and integration testing

Integration and acceptance testing are both used by software engineers, but they serve different purposes and are useful in different situations. Some of the main distinctions between acceptance and integration testing include the following:


When assessing software or a system, developers may use both acceptance and integration testing, but they do so at different stages. Integration testing is used earlier in the process by software engineers to check whether different system components can work together. Even when some software components are incomplete, developers might start integration testing. But it’s best to conduct acceptance testing at the end of the testing cycle. This is typically used by software developers to determine whether the system is usable by the user, and it requires that all of the software’s components be complete in order to conduct this testing.


Software engineers use integration testing as a method of assessing developing software as part of the evaluation process. However, acceptance testing frequently involves the client in determining whether it satisfies their requirements. Since the client may conduct acceptance testing at their location if they are using beta testing, integration testing almost always takes place at the developer’s site.


The specific software functionality that is its focus is another key distinction between the two testing approaches. Integrity testing looks to see that different parts of a program or system work well together. Instead of concentrating on the specific interactions between various features, acceptance testing focuses on how the system is used by the client and how it works as a whole.

When to use acceptance testing vs. integration testing

Before delivering their software to the customer, software developers typically use a variety of testing techniques. Because integration testing enables developers to assess whether various system components interact properly, they frequently use it before acceptance testing. Integration testing is typically carried out by software developers after unit testing is finished.

The process of acceptance testing starts after the software engineers test the product by analyzing the data transfer process and how various components work together. Acceptance testing is a technique used by software engineers to check whether the entire product satisfies the client’s requirements. A developer conducts this method of testing just before releasing the software because it typically requires a finished or nearly finished product.

Other software testing methods to consider

To ensure that their programs run smoothly, developers use a variety of testing techniques for many software development projects. In addition to acceptance testing or integration testing, the following additional testing techniques may be used:


What is the difference between UAT user acceptance testing and integration testing?

Key Differences Between SIT and UAT. After all the system’s components have been integrated, the SIT (System Integration Testing) is meant to test the functionality of the system as a whole. However, UAT (User Acceptance Testing) is in charge of testing the system from the viewpoint of the user.

What are the 4 types of acceptance testing?

Types of acceptance testing include:
  • Alpha & Beta Testing.
  • Contract Acceptance Testing.
  • Regulation Acceptance Testing.
  • Operational Acceptance testing.

What is the difference between integration testing and functional testing?

Functional testing is done to validate all functionalities. Unit testing is used to verify the correctness of individual pieces of code, and integration testing is used to verify the interaction between various modules.

What is the difference between acceptance test and regression test?

Acceptance test: if it fails, it indicates that the application is not performing as the client has anticipated it to. Regression test: if it is unsuccessful, it alerts you that the application no longer functions as it once did.

Related Posts

Leave a Reply

Your email address will not be published. Required fields are marked *