@Test
public void testReduceCompoundKey_CompoundKeyOneValue() {

    Map<String, Object> singleKeyMap = new HashMap<String, Object>();
    singleKeyMap.put("myAwesomeId", 123456L);
    CompoundKey singleKey = new CompoundKey(singleKeyMap);
    assertEquals(123456L, service.reduceCompoundKey(singleKey));
}