Python 3 模拟线程目标在 Unittest 中不起作用

Question

我有以下代码并存储在一个名为run_thread.py的文件中

from mymodule import Builder 

def run_thread(): 
    threads = []
    for chunk in chunks:
        thread = threading.Thread(target=Builder.work, args=(a, b, c))
        threads.append(thread)

        try:
            thread.start()
        except:
            pass

    for thread in threads:
        try:
            thread.join()
        except:
            pass

当我尝试在我的单元测试中模拟/修补 Builder.work 时，原来的 Builder.work 仍在运行，这不是我所期望的。

import unittest
from ddt import ddt, data, unpack
from mock import patch

@ddt
class TestRunThread(unittest.TestCase):
    @patch('run_thread.Builder.work')
    def test_run_thread(self, mock_work):
        run_thread()

Answer 1

它对我不起作用，因为 Builder.work() 是一个静态方法。

Answer 2

当patch一个类函数、属性、类属性时，这个根据文档使用

@patch.object(Builder, 'work')
def test_run_thread(self, mock_work):
    # this is tested to work with static method
    mock_work.return_value = ['a', 'bbbb']

类属性和类属性（不是实例成员）也可以使用

@patch('mymodule.Builder.class_attribute_or_property')
def test_mock_cls_attribute_or_property(mock_attribute):
    # this patch method tested not working for static method