python - Cannot mock subprocess.check_call

Question

I want to write a test for this function while mocking check_call (I don't want it to be called):

from subprocess import check_call

def foo_method():
    check_call(["ls"])
    print("hello")

This is the test:

import unittest.mock
from scripts import foo_method

@unittest.mock.patch("subprocess.check_call")
def test_foo_method(subprocess_check_call):
    foo_method()

But the check_call function is always called and is not mocked. What is wrong with the test?

question from:https://stackoverflow.com/questions/65601680/cannot-mock-subprocess-check-call

Answer 1

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