public void testMapConstructor() {
Map<String, Serializable> map = new HashMap<String, Serializable>();
map.put("field1", "value1");
map.put("field2", 2);
BasicMapId basicMapId = new BasicMapId(map);
assertEquals(basicMapId.get("field1"), map.get("field1"));
assertEquals(basicMapId.get("field2"), map.get("field2"));
}