Quarkus Test doesn't have compatibility with PIT

I’ve been creating a back-end service with Quarkus (tests in JUnit/PIT) and I’m not having a good experience with mutation testing (specifically with the first mutant I have to kill). The mutant is: replaced return value with null for org/company/controller/UserController::getUserInformations → SURVIVED.

Controller

@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public UserInformations getUserInformations(String userId) {
    return service.getUserInformations(userId);
}

I have some unit tests to this controller method. Thinking about the null mutant, I just added a Assertions.assertNotNull(userObject) in one of these tests. But, this isn’t working at all. So, how can I kill the mutant?

By the way, I’ve already ensured that the tests in question are being executed in the footer of the execution report:

[hcoles]

@gdcmarinho https://github.com/hcoles/pitest/releases/tag/1.8.0

[hcoles]

@gdcmarinho No problem, it was an interesting one. I suspect there are other test runners out there that have a similar problem that hasn’t been reported. Unfortunately I couldn’t find a clean general soloution to this, so if any more are identified, the code will have to be updated to recognise them and apply the fix.

Closing as fixed in 1.8.0.