Is there anybody who knows

<https://github.com/android-alatan>

this project? someone in other community, he said he uses this library and he doesn't need to test the view but he can write test code starting from some specific event(for example, click event) and test all the way to the end he wants to test. What does it mean? and How can I write code something like that and I guess it's related to some architecture. I don't really get it. If there's someone who knows how can it be achieved, could you please share that idea? I don't want to test instrumented test because it's slow and hard to test(for example, I need to go throw all the way to the screen to test that screen). It'd be nice If can do unit test and test the behaviours.