The AndroidX Test Library provides an extensive framework for testing Android apps. This library provides a set of APIs that allow you to quickly build and run test code for your apps, including JUnit 4 and functional user interface (UI) tests. You can run tests created using these APIs from the Android Studio IDE or from the command line.
For more details see developers.android.com/testing
See CONTRIBUTING.md
Use the Android issue tracker. See Reporting Bugs for more information.