在 mongodb 中测试数据 - 时间不同

Question

我目前正在测试我的数据库可访问性，但遇到了一个严重的问题。我正在模拟数据库并插入一个具有注册日期的用户对象。该日期首先写入一个变量，然后传递给应产生完全相同值的数据。嗯，它不...数据文件class User(Document):    email = EmailField(required=True)    first_name = StringField(max_length=50)    last_name = StringField(required=True, max_length=50)    registration_date = DateTimeField(default=datetime.utcnow())    last_login = DateTimeField()test_storage.pyimport datetimeimport pytestfrom mongoengine.connection import (    connect,    get_connection,)from mongodb.data import Userfrom storage.users import get_usersFMT = "%Y-%m-%d %H:%M"@pytest.fixture(scope='module')def mock_db():    connect('mongoenginetest', host='mongomock://localhost')@pytest.fixture(scope='module')def mock_user(mock_db):    user = {        'email': '[e-mail]',        'registration_date': datetime.datetime.utcnow(),        'last_name': 'Bowen',        'first_name': 'Charlie',    }    db_user = User (**user)    db_user.save()    return user, db_userdef test_storage_get_user(mock_user):    user, db_user = mock_user    users = get_users()    assert len(users) == 1    assert type(users[0]) == User    u = users[0]    assert u == db_user    assert u.email == user['email']    assert u.registration_date == user['registration_date']    assert u.last_name == user['last_name']    assert u.first_name == user['first_name']当我运行测试时，我得到以下结果：_____________________________________________________________________________________________________________________ test_storage_get_user _____________________________________________________________________________________________________________________mock_user = ({'email': '[e-mail]', 'first_name': 'Charlie', 'last_name': 'Bowen', 'registration_date': datetime.datetime(2018, 10, 4, 10, 49, 56, 814025)}, <User: User object>)def test_storage_get_user(mock_user):    user, db_user = mock_user    users = get_users()    assert len(users) == 1    assert type(users[0]) == User为什么那里的时间不一样？