In this video, I'll show code-level integration tests which simulate parts of the application and the shortcomings thereof. We'll see that, with regards to the overall test and feedback time, it is more efficient to focus on end-to-end integrative tests. In the video, I show the manual approach of how we could verify our application in a later system test by manually connecting to the example application. For the whole content, see here: https://blog.sebastian-daschner.com/entries/efficient-testing-video-course