[Django]-Django Test Mock Datetime Now

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5👍

You should patch objects in the module you’re testing, not in the module with tests.

Minimal working example based on your code:

app.py

from datetime import datetime

def my_great_func():
    # do something
    return datetime.now()

tests.py (notice how datetime in app.py is patched)

from datetime import datetime
from unittest import mock
from app import my_great_func

@mock.patch('app.datetime')
def test_my_great_func(mocked_datetime):
    mocked_datetime.now.return_value = datetime(2010, 1, 1)
    assert my_great_func() == datetime(2010, 1, 1)

Test execution results:

$ pytest -vvv tests.py 
======================= test session starts =========================
platform linux -- Python 3.5.2, pytest-3.2.1, py-1.4.34, pluggy-0.4.0
cachedir: .cache
rootdir: /home/xyz/projects/tmp, inifile:
plugins: mock-1.6.2, celery-4.1.0
collected 1 item                                                   

tests.py::test_my_great_func PASSED

==================== 1 passed in 0.00 seconds =======================
👤kchomski

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