python的python的datetime.datetime.now如何使用py.test进行monkeypatch？ [英] How to monkeypatch python's datetime.datetime.now with py.test?

问题描述

我需要测试使用 datetime.datetime.now（）的函数。什么是最简单的方法？

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。在下面的例子中，我正在创建夹具，以后我可以在其他测试中重新使用：

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, 05, 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

这篇关于python的python的datetime.datetime.now如何使用py.test进行monkeypatch？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！