@Test
	public void testUpdateSomeEntries() {
		//Rcupration de quelques enregistrements
		ArrayList<String> collectionId = new ArrayList<String>();
		
		collectionId.add("509d26d4a9c898012df57705");
		collectionId.add("509d26d4a9c898012df57706");
		collectionId.add("509d26d4a9c898012df57707");
		
	    //Mise  jour dans la base
		Assert.assertTrue(update.updateSomeEntries(db,"elements",collectionId));
		
		collectionId.clear();
	}