test_widgets.py 文件源码

def test_add(self):
        # attempt to add a child that is not a direct child of the paned window
        label = ttk.Label(self.paned)
        child = ttk.Label(label)
        self.assertRaises(tkinter.TclError, self.paned.add, child)
        label.destroy()
        child.destroy()
        # another attempt
        label = ttk.Label(self.root)
        child = ttk.Label(label)
        self.assertRaises(tkinter.TclError, self.paned.add, child)
        child.destroy()
        label.destroy()

        good_child = ttk.Label(self.root)
        self.paned.add(good_child)
        # re-adding a child is not accepted
        self.assertRaises(tkinter.TclError, self.paned.add, good_child)

        other_child = ttk.Label(self.paned)
        self.paned.add(other_child)
        self.assertEqual(self.paned.pane(0), self.paned.pane(1))
        self.assertRaises(tkinter.TclError, self.paned.pane, 2)
        good_child.destroy()
        other_child.destroy()
        self.assertRaises(tkinter.TclError, self.paned.pane, 0)