public final void testAddUserData_name1()
{
DeterministicVertex vA=new DeterministicVertex("a");
// here I cannot add, only set since the ID has already been set.
vA.setUserDatum(JUConstants.LABEL, new VertexID("name"), UserData.SHARED);Assert.assertEquals("name", vA.getID().toString());
vA.setUserDatum(JUConstants.LABEL, new VertexID("D"), UserData.SHARED);Assert.assertEquals("D", vA.getID().toString());
DeterministicVertex vS=new DeterministicVertex("a");
vS.setUserDatum(JUConstants.LABEL, new VertexID("name"), UserData.SHARED);Assert.assertEquals("name", vS.getID().toString());
}