@Test 
	public void getNeighbourhoodTestNoNeighours() {
		
		City_Graph city_graph2 = new City_Graph();

		city_graph2.loadMap("res/singleCity.mp");
		
		City testCity = city_graph2.getCity(0);
		VertexSet emptySet = new VertexSet();
		assertTrue(city_graph2.getNeighbourhood(testCity).equals(emptySet));
		
	}