As stated in the docs and other SO questions Android Studio provides a way to run your tests and get the code coverage (class, method and line level).
What framework or tool does it use internally to get the coverage ?
As stated in the docs and other SO questions Android Studio provides a way to run your tests and get the code coverage (class, method and line level).
What framework or tool does it use internally to get the coverage ?
Android Studio is based on IntelliJ, and as such uses IntelliJ's IDEA Code Coverage Runner. This is open source, and can be found here