问题描述
我需要测试使用 datetime.datetime.now() 的函数.最简单的方法是什么?
I need to test functions which uses datetime.datetime.now(). What is the easiest way to do this?
推荐答案
你需要monkeypatch datetime.now 函数.在下面的示例中,我正在创建可以稍后在其他测试中重复使用的夹具:
You need to monkeypatch datetime.now function. In example below, I'm creating fixture which I can re-use later in other tests:
import datetime import pytest FAKE_TIME = datetime.datetime(2020, 12, 25, 17, 5, 55) @pytest.fixture def patch_datetime_now(monkeypatch): class mydatetime: @classmethod def now(cls): return FAKE_TIME monkeypatch.setattr(datetime, 'datetime', mydatetime) def test_patch_datetime(patch_datetime_now): assert datetime.datetime.now() == FAKE_TIME