测试函数是否已应用于集合的每个项的干净方法?

你可以断言 some_other_function 通过使用仅调用原始函数的模拟对每个元素进行模拟来调用,例如:

import unittest

from mock import patch, Mock, call


def some_other_function(x):
    return 2 * x


def some_function_under_test(some_list_type_arg):
    return map(some_other_function, some_list_type_arg)


class Tests(unittest.TestCase):
    def test_thing(self):
        with patch('__main__.some_other_function', Mock(side_effect=some_other_function)) as other_mock:
            self.assertEqual(list(some_function_under_test([1, 2, 3])),
                             [2, 4, 6])
        self.assertEqual(other_mock.call_args_list,
                         [call(1), call(2), call(3)])


unittest.main()