Editing Unit testing (section)

=== Limitations for testing integration with external systems ===
Unit tests tend to be easiest when a method has input parameters and some output. It is not as easy to create unit tests when a major function of the method is to interact with something external to the application. For example, a method that will work with a database might require a mock up of database interactions to be created, which probably won't be as comprehensive as the real database interactions.<ref>{{cite web| url=http://wiki.c2.com/?UnitTestsAndDatabases | title=Unit Tests And Databases | access-date=2024-01-29}}</ref>{{better source needed|date=February 2019}}