def METHOD_NAME(self):
    "Test referencing an invalid game member object"
    def foo():
        g = pygambit.Game.new_tree()
        g.players.add("One")
        s = g.players[0].strategies[0]
        g.root.append_move(g.players[0], 2)
        s.number
    self.assertRaises(RuntimeError, foo)