Caffeine <=2.2.7 deadlock repro test

caffinedeadlockrepro.java

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertEquals;

import java.util.concurrent.CompletableFuture;

import org.junit.Test;

import com.github.benmanes.caffeine.cache.AsyncLoadingCache;
import com.github.benmanes.caffeine.cache.Caffeine;

public class CaffeineTest {

    @Test(timeout = 5000)
    public void deadlock() throws Exception {
        CompletableFuture<String> future = new CompletableFuture<>();

        AsyncLoadingCache<String, String> cache = Caffeine
                .newBuilder()
                .buildAsync((k, e) -> future);

        cache.synchronous().refresh("TEST");
        CompletableFuture<String> get = cache.get("TEST");

        future.complete("success");
        assertEquals("success", get.get());
    }
}