在子进程中调用的Python模拟函数

Question

Having following file handler.py

import job

def worker():
   return job()

And following test test_handler.py

import subprocess

def test_worker():
     subprocess.Popen(['./handler.py'], stderr=subprocess.PIPE)        

How can I mock job function, taking into account that handler.py is called in subprocess

Answer 1

This isn't the best approach to test this feature.

Since it is a unit test, you should test the worker and check it's value.

handler.py

import job

def worker():
    return job()

test_handler.py

import unittest
from handler import worker

class TestHandlerCase(unittest.TestCase):

    def test_worker(self):
        """Test call worker should succeed."""
        self.assertEqual(worker(), True)

if __name__ == '__main__':
    unittest.main()

Check if the result of method is equal to the expected. And so, adjust the method/test.

Anyway, this is an example, based on you question code.