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Espresso Idling Resource

OkHttp Idling Resource with Retrofit

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In this lesson you will learn how to use OkHttp Idling Resource to wait for Retrofit to finish fetching data from the internet.

In this lesson you will learn:

How to create a singleton OkHttp client for both your app and your test
How to pass the OkHttp client to Retrofit
How to create and use OkHttp Idling Resource in your Espresso test




I am trying to run this with androidx in Kotlin, but it is not working!!

First I changed in app/build.gradle:
androidTestImplementation "androidx.test.espresso:espresso-core:3.2.0"
androidTestImplementation "androidx.test:runner:1.2.0"
androidTestImplementation "androidx.test:rules:1.1.0"

Then I changed the imports in file for the ones below:

import androidx.test.espresso.IdlingResource;
import androidx.test.espresso.IdlingRegistry;
import androidx.test.rule.ActivityTestRule;
import com.jakewharton.espresso.OkHttp3IdlingResource;
import org.junit.Rule;
import org.junit.Test;
import static androidx.test.espresso.Espresso.onView;
import static androidx.test.espresso.assertion.ViewAssertions.matches;
import static androidx.test.espresso.matcher.ViewMatchers.withId;
import static androidx.test.espresso.matcher.ViewMatchers.withText;

But still, is not working!

You can use a wrapper to match the androidx type:

import androidx.test.espresso.IdlingResource

class Wrapper(private val r: OkHttp3IdlingResource): IdlingResource {
override fun getName(): String =
override fun isIdleNow() = r.isIdleNow
override fun registerIdleTransitionCallback(callback: IdlingResource.ResourceCallback?) {

Use the wrapper like this:

val idlingResource = Wrapper(OkHttp3IdlingResource.create("okhttp", OkHttpProvider.getOkHttpInstance()))

And this error appears:

Also, I read this:

So, if Jake Wharton didn't implemented this OkHttp for the androidx, well, how can we use it in Kotlin, and with androidx?

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