@Test
public void testAddIdenticalLabel() {

	MonolingualTextValue label = Datamodel.makeMonolingualTextValue("strudel aux pommes", "fr");
	ItemDocument currentDocument = ItemDocumentBuilder.forItemId(Q1).withLabel(label).build();
	TermStatementUpdate su = makeUpdate(currentDocument,
			Collections.singletonList(label),
			Collections.emptyList(),
			Collections.emptyList(),
			Collections.emptyList());
	
	assertEquals("{}", su.getJsonUpdateString());
	assertTrue(su.isEmptyEdit());
}