AndroidJUnit4.class is deprecated: How to use androidx.test.ext.junit.runners.AndroidJUnit4?

Question

For my instrumentation tests I was using

@RunWith(AndroidJUnit4.class) 

from

import androidx.test.runner.AndroidJUnit4; 

in order to establish my test cases. Now this line gets marked as deprecated with the hint to use AndroidJUnit4 from

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

However if I try to import AndroidJUnit4 from the named package I get the error, that ext can not be resolved.

Do you have an idea, what package should be included in gradle to resolve this issue?

Answer 1

According to the documentation for AndroidJUnit4,

1. The gradle file should contain the following line:

androidTestImplementation 'androidx.test.ext:junit:1.1.1'

2. Change test class to AndroidJUnit4ClassRunner from AndroidJUnit4

If it still doesn't work, make sure that you clean and/or rebuild your project. Also you can check the current version directly in Google's maven repository

Answer 2

If you've tried @MarcelGangwisch's solution and your build fails saying it can't find the resource AND you also cleaned/rebuilt your project and it still doesn't work, try this: (based also on @KrzysztofDziuba's solution)

In your gradle file where you changed the dependency, make sure you are adding it as the type you need, ie.:

For UI tests:

androidTestImplementation 'androidx.test.ext:junit:1.1.0'

For Unit tests:

testImplementation 'androidx.test.ext:junit:1.1.0'

In my instance I added it as both and now it works.