@Test(dependsOnMethods = "populate")
public void testMultiEdgeWithSameVertex() {
database.open("admin", "admin");
OGraphVertex lucaNode = database.createVertex().set("name", "Luca").set("surname", "Garulli").save();
OGraphVertex carNode = database.createVertex("GraphCar").set("brand", "Hyundai").set("model", "Coupe").set("year", 2003).save();
OGraphVertex motoNode = database.createVertex("GraphMotocycle").set("brand", "Yamaha").set("model", "X-City 250")
.set("year", 2009).save();
lucaNode.link(carNode).setLabel("drives");
lucaNode.link(carNode).setLabel("owns");