AndroidJUnit4 vs Robolectric test runner

[jaredsburrows]

Should this repo be looking to support AndroidJUnit4 in the future?

Source: https://cs.android.com/androidx/android-test/+/main:ext/junit/java/androidx/test/ext/junit/runners/AndroidJUnit4.java;l=55?q=AndroidJUnit4

Robolectric docs: https://robolectric.org/androidx_test/#testrunner

[warnyul]

@jaredsburrows This repository is unrelated to JUnit 4. It’s actually an experimental JUnit 5 extension. If your project uses JUnit 4, this extension won’t be necessary for your setup. Let me know if you have any other questions!

[jaredsburrows]

Based on the Robolectric documentation, AndroidJUnit4 test runner supercedes Roboletric test runner.

Is this repo only a proof of concept to get Robolectric working with JUnit 5?

[warnyul]

Yes, this is a poc repo for JUnit5, because there is no official support for JUnit 5 yet in Roboloctric.

Under the hood AndroidJUnit4 also uses RobolectricTestRunner. What do you mean? Why this repo should support AndroidJUnit4?