Migrating Junit4 tests to androidx: What causes 'delegate runner could not be loaded'?

Question

I am migrating my app to androidx, I can\'t seem to get my unit tests working. I took example from Google\'s AndroidJunitRunnerSample, which has been updated to use the new

Answer 1

You can use @JvmField. From documentation

Instructs the Kotlin compiler not to generate getters/setters for this property and expose it as a field

@Rule
@JvmField
val activityActivityTestRule = ActivityScenarioRule(MainActivity::class.java)