node2 = desc.create("Node")
iface1 = desc.create("Interface")
iface1.set_attribute_value("fake", True)
+ addr1 = iface1.add_address()
+ addr2 = iface1.add_address()
+ addr3 = iface1.add_address()
+ self.assertRaises(RuntimeError, iface1.add_address)
node1.connector("devs").connect(iface1.connector("node"))
iface2 = desc.create("Interface")
iface2.set_attribute_value("fake", True)