Question

假设我们有一个现有的地图：

const m1 = new Map([['color', 'red'], ['owner', 'Flavio'], ['age', 2]])

如果我们要创建一个新地图，是否足够：

const m2 = new Map(m1);

或者也许是：

const m2 = new Map(Array.from(m1))

Answer 1

MDN表示您可以这样做。

import sys
import mock
import unittest
import StringIO
import __builtin__


# [..] your code


class Test(unittest.TestCase):
    @mock.patch.object(__builtin__, 'raw_input')
    def test_refreshtime_validation(self, mocked_raw_input):
        my_stdout = StringIO.StringIO()
        sys.stdout = my_stdout
        mocked_raw_input.side_effect = ['error', '0', '1']
        outputs = '\n**Please enter a valid number (Must be an integer).**\n'+\
            '\n\n**Please enter a valid number (Must be greater than 0).**\n\n'
        valid_value = refreshtime_validation()
        sys.stdout = sys.__stdout__
        self.assertEquals(my_stdout.getvalue(), outputs)
        self.assertEquals(valid_value, 1)


unittest.main()

从现有地图初始化地图

1 个答案: