androidTest not compiling, showing cannot resolve symbol

Question

I'm trying to add instrumented test using Espresso in my android project.

I've added all necessary libs, besides adding AndroidJUnitRunner as the testInstrumentationRunner:

But for some reason, the imports are not working in instrumented test file:

But the local test file is getting the imports properly:

I've also added junit as androidTestImplementation, but makes no difference:

androidTestImplementation 'junit:junit:4.12'

This is why I cannot run the test file.

If I run the file anyway, I get this error:

Process finished with exit code 1 Class not found: "com.mcp.shippax.MainActivityEspressoTest"Empty test suite.

I cannot understand why this is happening (numerous grade syncs/invalidate caches/restarts), when the setup is so straight and simple.

I don't remember making any project changes other than converting most of my source files to Kotlin, including the test files. But later I reverted the test files back to java again.

Are you putting your test file in test or androidTest folder? — Bach Vu
– Bach Vu, Commented Feb 13, 2019 at 6:31
@BachVu in androidTest obviously :-) pasteboard.co/I0VLPBz.png. — Abu Ruqaiyah
– Abu Ruqaiyah, Commented Feb 13, 2019 at 6:35
Then it won't work, what you are doing is unit test, create test file in test folder — Bach Vu
– Bach Vu, Commented Feb 13, 2019 at 6:43
Um.. why do u think it's unit test? and what should I do to make it instrumented test? Fyi.. I'm simply trying this: github.com/google-developer-training/… — Abu Ruqaiyah
– Abu Ruqaiyah, Commented Feb 13, 2019 at 6:50
Oh my bad, I'm messing it up. Now, from what I'm seeing, you might be missing this androidTestImplementation org.jetbrains.kotlin:kotlin-test-junit:.. — Bach Vu
– Bach Vu, Commented Feb 13, 2019 at 7:59

Róbert Ďuriančík · Accepted Answer · 2019-05-28 19:07:23Z

I had the same issue. I've had various build types for dev and prod environments and what helped me, was to specify testBuildType like in this answer https://stackoverflow.com/a/34778780/9736105.

So something like this:

android { ... testBuildType "<my-build-type>" buildTypes { <my-build-type> { ... } .... } }

After I did that and set my build variant to that build type, I was able to resolve all dependecies.

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