Quarkus СacheManager injection in integration test - kotlin

Question

I have a Quarkus application that makes use of caches for methods.
These methods and cache eviction got to be tested somehow preferably when Quarkus context is fully operational.
This is what I figured (PostgresContainer for reference):
#QuarkusTest
class ScreeningRepositorySpec : PostgresContainer() {
private val cacheManager = CaffeineCacheSupplier().get()
init {
"test cache manager gets initialized" {
logger().info("Cache size: {}", cacheManager.size)
}
}
}
The problem arises when any kind of invocation happens for cacheManager: it fires NPE. https://github.com/im-infamou5/quarkus-cache-playground
Downstream code as follows is
#Override
public List<CaffeineCache> get() {
CacheManager cacheManager = cacheManager();
...
}
which ultimately yields:
public static CacheManager cacheManager() {
return Arc.container().instance(CacheManager.class).get();
}
And here comes that Arc.container() is null somehow.
What else was tried:
#QuarkusIntegrationTest - no bean for injection, null for arc container
Explicit #Inject for CacheManager - yields "no bean matches injection point"
Explicit Cache definition with manual CacheManager instantiation - same issue with null arc container
Variations for #Inject for default bean injection - same things about missing injection point
Looks like CacheManager bean lifecycle issue that expects it way too early and never succeeds as a result.
I've dug into quarkus tests which have quite a workaround but still hope easier approach is available to avoid this much dependensies just to test cache properly.
Version of Quarkus is 2.7.0.
Sample project can be found here with simple type of direct injection.
Output as follows:
org.acme.GreetingResourceIT > test cache size FAILED
kotlin.UninitializedPropertyAccessException at GreetingResourceIT.kt:11
Caused by: kotlin.UninitializedPropertyAccessException at GreetingResourceIT.kt:11