@Test
    public void testCommitOffsetRequestAsyncWithFencedInstanceIdException() {
        assertThrows(FencedInstanceIdException.class, this::receiveFencedInstanceIdException);
    }
Verifies that subscription change updates SubscriptionState correctly even after JoinGroup failures
that don't re-invoke onJoinPrepare.
clients/src/test/java/org/apache/kafka/clients/consumer/internals/ConsumerCoordinatorTest.java