public class SomeTest {

    @Rule
    public CouchbaseContainer couchbase = new CouchbaseContainer()
             .withClusterAdmin("admin", "secret")
             .withNewBucket(DefaultBucketSettings.builder()
                        .enableFlush(true)
                        .name("bucket-name")
                        .password("secret")
                        .quota(100)
                        .type(BucketType.COUCHBASE)
                        .build());
    
    @Test
    public void someTestMethod() {
        Bucket bucket = couchbase.getCouchbaseCluster().openBucket("bucket-name");
        
        // ... interact with client as if using Couchbase normally
    }
}

public class SomeTest extends AbstractCouchbaseTest {

    @Test
    public void someTestMethod() {
        Bucket bucket = getBucket();
        
        // ... interact with client as if using Couchbase normally
    }
}