test_widgets.py 文件源码

def test_values(self):
        def check_get_current(getval, currval):
            self.assertEqual(self.combo.get(), getval)
            self.assertEqual(self.combo.current(), currval)

        self.assertEqual(self.combo['values'],
                         () if tcl_version < (8, 5) else '')
        check_get_current('', -1)

        self.checkParam(self.combo, 'values', 'mon tue wed thur',
                        expected=('mon', 'tue', 'wed', 'thur'))
        self.checkParam(self.combo, 'values', ('mon', 'tue', 'wed', 'thur'))
        self.checkParam(self.combo, 'values', (42, 3.14, '', 'any string'))
        self.checkParam(self.combo, 'values', () if tcl_version < (8, 5) else '')

        self.combo['values'] = ['a', 1, 'c']

        self.combo.set('c')
        check_get_current('c', 2)

        self.combo.current(0)
        check_get_current('a', 0)

        self.combo.set('d')
        check_get_current('d', -1)

        # testing values with empty string
        self.combo.set('')
        self.combo['values'] = (1, 2, '', 3)
        check_get_current('', 2)

        # testing values with empty string set through configure
        self.combo.configure(values=[1, '', 2])
        self.assertEqual(self.combo['values'],
                         ('1', '', '2') if self.wantobjects else
                         '1 {} 2')

        # testing values with spaces
        self.combo['values'] = ['a b', 'a\tb', 'a\nb']
        self.assertEqual(self.combo['values'],
                         ('a b', 'a\tb', 'a\nb') if self.wantobjects else
                         '{a b} {a\tb} {a\nb}')

        # testing values with special characters
        self.combo['values'] = [r'a\tb', '"a"', '} {']
        self.assertEqual(self.combo['values'],
                         (r'a\tb', '"a"', '} {') if self.wantobjects else
                         r'a\\tb {"a"} \}\ \{')

        # out of range
        self.assertRaises(tkinter.TclError, self.combo.current,
            len(self.combo['values']))
        # it expects an integer (or something that can be converted to int)
        self.assertRaises(tkinter.TclError, self.combo.current, '')

        # testing creating combobox with empty string in values
        combo2 = ttk.Combobox(self.root, values=[1, 2, ''])
        self.assertEqual(combo2['values'],
                         ('1', '2', '') if self.wantobjects else '1 2 {}')
        combo2.destroy()