@Test
public void testReduceCompoundKey_CompoutKeyMultiValue() {

    Map<String, Object> multiKeyMap = new HashMap<String, Object>();
    multiKeyMap.put("myAwesomeId", 123456L);
    multiKeyMap.put("myOtherAwesomeId", "abcdefg");
    CompoundKey multiKey = new CompoundKey(multiKeyMap);
    assertEquals(multiKey, service.reduceCompoundKey(multiKey));
}