How do I import ActivityScenario?

Question

I am attempting to follow the Android ActivityScenario documentation to write Robolectric-based tests. Adding androidTestImplementation "androidx.test.core:app:1.2.0" to my build.gradle allows me to add import androidx.test.core.app.ActivityScenario; to my test class and use the ActivityScenario class. Despite this, gradle is reporting Failed to resolve: androidx.test.core:app:1.2.0 which means I can't run the tests.

I have tried cleaning the build, re-running the gradle sync, invalidating caches and restarting. I have also tried importing other packages from https://mvnrepository.com/artifact/androidx.test, none of which result in ActivityScenario being found. In particular, I would expect androidTestImplementation "androidx.test:core:1.2.0" to work but it does not.

Versions:

• Android Studio 3.5
• Robolectric 4.3.1

Answer 1

I just realized that because I am trying to write Robolectric tests which are not instrumented, I need to use testImplementation rather than androidTestImplementation.

Adding testImplementation "androidx.test:core:1.2.0" to my build.gradle works as expected.

How very strange that androidTestImplementation "androidx.test.core:app:1.2.0" somehow tricked Android Studio into resolving the class.