Android test raw resource

By default your androidTest project will include your app's R class, but androidTest's resources will be generated into a separate file. Make sure you import the R class from your test project:

import com.your.package.test.R;

[..]

getInstrumentation().getContext().getResources().openRawResource(R.raw.test_file);

You can also directly reference the test project's R class:

getInstrumentation().getContext().getResources().openRawResource(com.your.package.test.R.raw.test_file);

See Android Unit Tests Requiring Context. For instrumentation test use InstrumentationRegistry.getInstrumentation().getTargetContext() (in Kotlin: getInstrumentation().targetContext). Then you can access resources. You won't need to import R file.

I had the androidTest resources in the right spot (src/androidTest/res) and I still couldn't access them via <normal.package>.test.R. I spent a lot of time googling trying to figure out what was going on..

I FINALLY stumbled onto the answer. If you're building a buildType where you specified an applicationIdSuffix, your files are at <applicationId><applicationIdSuffix>.test.R !!!!

i.e.

applicationId "com.example.my.app"

buildTypes {
    debug {
        applicationIdSuffix ".debug"
    }
}

if you have androidTest resources in the right directory, then you can only access them via com.example.my.app.debug.test.R !!!!