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- [Chiu-Ki] Welcome to Effective Android Testing. I am Chiu-Ki Chan, a Google Developer Expert in Android. Testing is essential in delivering high quality software. But it can be confusing, especially for Android. In this course, we will be building an Android app together with testing as an integral part of the process. We will explore the difference between JVM tests and on device tests, when to use each one, and then we will go into the more advanced techniques such as the Robo pattern and the MVP pattern. At the end of the course, you will see how testing helps you catch bugs, enforce modularity, and implement features faster. After our journey, you will have a sense of how to reason through your app and decide when and where you should test. A lot of people think that testing is something that you do after the app is done. But I recommend integrating testing as a part of your workflow. So, let's get started.