### Question:
KafkaSourceCounter extends SourceCounter implements  KafkaSourceCounterMBean { public long addToKafkaEventGetTimer(long delta) { return addAndGet(TIMER_KAFKA_EVENT_GET,delta); } KafkaSourceCounter(String name); long addToKafkaEventGetTimer(long delta); long addToKafkaCommitTimer(long delta); long incrementKafkaEmptyCount(); long getKafkaCommitTimer(); long getKafkaEventGetTimer(); long getKafkaEmptyCount();  }### Answer:
@Test public void testAddToKafkaEventGetTimer() throws Exception { Assert.assertEquals(1L, counter.addToKafkaEventGetTimer(1L)); }