@Test
public void testToBaseMessageIdStringWithStringBeginningWithEncodingPrefixForString() {

    String stringMessageId = AMQPMessageIdHelper.AMQP_STRING_PREFIX + "myStringId";
    String expected = AMQPMessageIdHelper.AMQP_STRING_PREFIX + stringMessageId;
    String baseMessageIdString = messageIdHelper.toBaseMessageIdString(stringMessageId);
    assertNotNull("null string should not have been returned", baseMessageIdString);
    assertEquals("expected base id string was not returned", expected, baseMessageIdString);
}