How to get a view from within Espresso to pass into an IdlingResource?

Question

I essentially have a custom IdlingResource that takes a View a constructor argument. I can\'t find anywhere that really talks about how to implemen

Answer 1

If you are using ActivityScenarioRule from androidx.test.ext.junit.rules (since ActivityTestRule "will be deprecated and eventually removed from library in the future"), you can get your Activity instance and call findViewById method:

import androidx.test.ext.junit.rules.activityScenarioRule
import androidx.test.ext.junit.runners.AndroidJUnit4

@RunWith(AndroidJUnit4::class) {

    @get: Rule
    var testRule = activityScenarioRule()

    @Test
    fun mainTestCase() {
        testRule.scenario.onActivity { activity ->
            val view = activity.findViewById(R.id.view)
        }
    }
}