In this video, I'll show the approach behind so-called use case tests. Use case tests aim to verify the execution of a business use case including all involved components excluding all external concerns, such as HTTP gateways or database access. In order to ensure that use case tests run quickly, without starting up parts of the application, we use plain JUnit here, as well. To make our tests maintainable, we come up with reusable test doubles, that extend the involved classes in the production scope. In the video, we'll see how the approach works with example code. For the whole content, see here: https://blog.sebastian-daschner.com/entries/efficient-testing-video-course