InitializationError for AndroidJunit4

Question

I have a single, simple unit test in my Android app module:

/src/test/java/org.acme.test/SimpleTest.java

When I run:

./gradlew clean testDebug --tests='*.SimpleTest'

I get this exception:

java.lang.Exception: Custom runner class AndroidJUnit4 should have a public constructor with signature AndroidJUnit4(Class testClass)

Why does it think 'AndroidJUnit4' is a custom runner class, when it's a final class?

Answer 1

You might have the test class in test directory instead of androidTest.