test_container.py 文件源码

def test_list_box(self):
        lb = urwid.ListBox(urwid.SimpleFocusListWalker([]))
        self.assertEqual(lb.focus, None)
        self.assertRaises(IndexError, lambda: getattr(lb, 'focus_position'))
        self.assertRaises(IndexError, lambda: setattr(lb, 'focus_position',
            None))
        self.assertRaises(IndexError, lambda: setattr(lb, 'focus_position', 0))

        t1 = urwid.Text(u'one')
        t2 = urwid.Text(u'two')
        lb = urwid.ListBox(urwid.SimpleListWalker([t1, t2]))
        self.assertEqual(lb.focus, t1)
        self.assertEqual(lb.focus_position, 0)
        lb.focus_position = 1
        self.assertEqual(lb.focus, t2)
        self.assertEqual(lb.focus_position, 1)
        lb.focus_position = 0
        self.assertRaises(IndexError, lambda: setattr(lb, 'focus_position', -1))
        self.assertRaises(IndexError, lambda: setattr(lb, 'focus_position', 2))