Difference Between System Testing and Integration Testing


System testing is a type of software testing in which a software product is tested as a whole for the validation of its functional and non-functional requirements, whereas integration testing is a testing in which a software product is tested for the interfacing between its different modules that are interlinked with each other.

Read this article to learn more about system testing and integration testing and how they are different from each other.

What is System Testing?

System Testing is a testing which is used to validate the functionality of a software product developed. It is also known as black box testing. This testing involves the behavioral as well as functional testing of the software product as per the documents provided for testing.

System testing is generally performed by developers as well as testers. It includes both the module basis testing and integration testing with multiple modules.

System testing is generally executed after the development and before the delivery of the software product. Since it is performed by a group of testers, it would contain more negative test cases. System testing uses all the possible dummy inputs for testing purpose.

What is Integration Testing?

Integration testing is a testing in which multiple modules are tested to verify that if different pieces of the modules are working together as per expectation or not. Integration testing helps to validate the collection and interface modules of the product.

Integration testing is generally performed after performing the unit testing, because this testing requires the knowledge of interlinked modules and their interactions. Priority is given to the functionalities in the system interface among individual modules.

Integration testing covers only the functional testing of the product. It is often performed by test engineers and developers.

Difference between System Testing and Integration Testing

The following table highlights all the major differences between system testing and integration testing −

S.No.

System Testing

Integration Testing

1.

It helps in testing the finished product.

It helps validate the collection and interface modules.

2.

It is performed after integration testing.

It is performed after unit testing.

3.

It requires the person performing the system testing to understand the internal structure and the programming language.

It requires the knowledge of interlinked modules and their interactions.

4.

The importance is on the behavior of the module as an entirety.

The importance is given to the functionalities in the system interface between individual modules.

5.

It covers the functional and the non-functional tests.

It covers the functional testing only.

6.

The test cases have been created to resemble/work with real life situations.

The test cases have been built to simulate the interaction between the two modules in question.

7.

The different approaches used are big-bang, incremental and functional types.

The various approaches are sanity test, regression test, usability test, retesting, maintenance, and performance tests.

8.

They are executed by test engineers only.

It can be used by test engineers and developers.

Conclusion

The most significant difference between the two is that system testing is performed to test the finished product, while integration testing is performed to validate the collection and interface modules.

Updated on: 22-Feb-2023

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