Test the Cupcake app: Android Basics with Compose

[alghe-global]

URL of codelab
https://developer.android.com/codelabs/basic-android-kotlin-compose-test-cupcake?continue=https%3A%2F%2Fdeveloper.android.com%2Fcourses%2Fpathways%2Fandroid-basics-compose-unit-4-pathway-2%23codelab-https%3A%2F%2Fdeveloper.android.com%2Fcodelabs%2Fbasic-android-kotlin-compose-test-cupcake#4

In which task and step of the codelab can this issue be found?
2

Describe the problem

Create a variable in the test function with the value of the R.string.back_button resource.

I had to import R:

import com.example.cupcake.R

for R.string.back_button to resolve correctly

Steps to reproduce?

1. Go to...
2. Click on...
3. See error...

Versions
Android Studio version:
API version of the emulator:

Additional information
Include screenshots if they would be useful in clarifying the problem.