@Test
public void testToBaseMessageIdStringWithUnsignedLong() {

    UnsignedLong uLongMessageId = UnsignedLong.valueOf(123456789L);
    String expected = AMQPMessageIdHelper.AMQP_ULONG_PREFIX + uLongMessageId.toString();
    String baseMessageIdString = messageIdHelper.toBaseMessageIdString(uLongMessageId);
    assertNotNull("null string should not have been returned", baseMessageIdString);
    assertEquals("expected base id string was not returned", expected, baseMessageIdString);
}