These tests are meant to run locally and verify the most fundamental bits of logic in your code. Why should I use them? Whether it be a function, a class, or anything else, unit tests are meant to test every feature/potential logical path. In fact, writing a unit test for every possible flow of your code is called 100% code coverage

Functional Test - a test that checks the functionality as opposed to e.g. Performance. This can be a unit test as well, but since this terminology is mostly used by QA - when people talk about them they usually mean Functional System Test. Note, that different authorities may use different definitions of the same terms.

Unit Testing vs Functional Testing. Both Unit Tests and Functional Tests are done to identify defects, prevent them and thus, deliver a quality product. Below are the differences between Unit Testing and Functional Testing.

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    • functional test vs unit test