Difference between Unit Testing and Integration Testing

Unit Testing:
Unit Testing is defined as a type of software testing where individual components of a software are tested.

Unit Testing of software product is carried out during the development of an application. An individual component may be either an individual function or a procedure. Unit Testing is typically performed by the developer. It is a testing method using which every independent modules are tested to determine if there are any issue by the developer himself.

Integration Testing:
Integration testing is the process of testing the interface between two software units or modules. Its focus is on determining the correctness of the interface. The purpose of the integration testing is to expose faults in the interaction between integrated units. Once all the modules have been unit tested, integration testing is performed.

Difference between Unit and Integration Testing:

Unit Testing Integration Testing
In unit testing each module of the software is tested separately. In integration testing all modules of the the software are tested combined.
In unit testing tester knows the internal design of the software. In integration testing doesn’t know the internal design of the software.
Unit testing is performed first of all testing processes. Integration testing is performed after unit testing and before system testing.
Unit testing is a white box testing. Integration testing is a black box testing.
Unit testing is basically performed by the developer. Integration testing is performed by the tester.
Detection of defects in unit testing is easy. Detection of defects in integration testing is difficult.
It tests parts of the project without waiting for others to be completed. It tests only after the completion of all parts.
Unit testing is less costly. Integration testing is more costly.

Don’t stop now and take your learning to the next level. Learn all the important concepts of Data Structures and Algorithms with the help of the most trusted course: DSA Self Paced. Become industry ready at a student-friendly price.

My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :

Be the First to upvote.

Please write to us at contribute@geeksforgeeks.org to report any issue with the above content.