Add description to run test and jacoco to README
@@ -63,6 +63,8 @@ Prerequisites:
Once all the prerequisites are met, make sure that the `ANDROID_HOME` environment variable is set to your Android SDK directory, then run `./gradlew assembleFreeDebug` at the base directory of the project to start the build. After the build completes, navigate to `app/build/outputs/apk/free/debug` where you will end up with an APK file ready to install on your Android device.
+Also, we integrate [robolectric](https://github.com/robolectric/robolectric) as unit test tool, and we can execute `./gradlew test` to run all tests and `./gradlew jacocoTestReport` to run jacoco for coverage report. If you bring some code improvement such as bug fix, we recommend you to write test for it with robolectric.
+
## For Third-Party App Developers
#### Android 10 Desktop Mode support via libtaskbar
