@Test
	public void testGetSeveralEntries() {
		ArrayList<String> collectionId = new ArrayList<String>();
		collectionId.add("509d2671a9c8060c652b8085");
		collectionId.add("509d2671a9c8060c652b8086");
        ArrayList<DBObject> coll = read.getSeveralEntries(db,"elements",collectionId);
        
        assertEquals(read.getOneEntry(db, "elements", "509d2671a9c8060c652b8085"),coll.get(0));
        assertEquals(read.getOneEntry(db, "elements", "509d2671a9c8060c652b8086"),coll.get(1));

	}