System testing is a level of testing where the application as a whole is tested for its compliance to functional and non-functional requirements.
Whereas, in integration testing, we test the interfacing between the modules which are interconnected with each other.
Let’s now see the difference between the two.
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System vs Integration Testing
| System Testing | Integration Testing |
|---|---|
| In system testing, we check the system as a whole. | In integration testing, we check the interfacing between the inter-connected components. |
| It is performed after integration testing. | It is performed after unit testing. |
| It is carried out for performing both functional and non-functional testing(performance, usability, etc). | It is generally limited to functional aspects of the integrated components. |
| Since the testing is limited to the evaluation of functional requirements, hence, it includes black-box testing techniques only. | Since the interfacing logic is required to perform this testing, hence, it requires white/grey box testing techniques along with black-box techniques. |
| The different types of system testing are- Functional testing, Performance testing, Usability testing, Reliability testing, Security testing, Scalability testing, Installation testing, etc. | The different approaches of performing integration testing namely – Top-down, bottom-up, big-bang and hybrid integration. |
Check the infographic below for a quick recap.
More Difference Between
For details on the system and integration testing, check our tutorials – System Testing and Integration Testing. Also, check our complete Software Testing Tutorial.
System testing is a black box testing technique that is used to assess the functionality of a complete and integrated software product. The main purpose of system testing is to find out whether the software system is fit for purpose. Integration testing, on the other hand, is a type of testing that is used to check whether the different components of a software system are working properly and whether they are working together as expected.