public long searchOffset(MessageQueue mq, long timestamp) throws MQClientException {
        // default return lower boundary offset when there are more than one offsets.
        return searchOffset(mq, timestamp, BoundaryType.LOWER);
    }
@Test
    public void assertSearchOffset() throws MQClientException {
        assertEquals(0, mqAdminImpl.searchOffset(new MessageQueue(), defaultTimeout));
    }