mongodb 中的测试数据 - 时间变化

Question

我目前正在测试我的数据库可访问性，我运行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。该日期首先被写入一个变量，然后传递给应该产生完全相同值的数据。好吧，它没有...

data.py

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.py

import datetime
import pytest

from mongoengine.connection import (
    connect,
    get_connection,
)

from mongodb.data import User
from storage.users import get_users


FMT = "%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': 'wijgowol@kogun.gi',
        'registration_date': datetime.datetime.utcnow(),
        'last_name': 'Bowen',
        'first_name': 'Charlie',
    }
    db_user = User (**user)
    db_user.save()

    return user, db_user



def 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': 'wijgowol@kogun.gi', '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

    u = users[0]
    assert u == db_user
    assert u.email == user['email']
>       assert u.registration_date == user['registration_date']
E       assert datetime.datetime(2018, 10, 4, 10, 49, 56, 814000) == datetime.datetime(2018, 10, 4, 10, 49, 56, 814025)
E        +  where datetime.datetime(2018, 10, 4, 10, 49, 56, 814000) == <User: User object>.registration_date

app/test/test_impl.py:53: AssertionError

为什么那里的时间不同？

Answer 1

如果您在 data.py 中默认了注册日期，那您为什么还要在创建用户字典时设置它？也许这就是造成它的原因。另外你为什么不直接创建一个 User 呢？

你有这个：

user = {
    'email': 'wijgowol@kogun.gi',
    'registration_date': datetime.datetime.utcnow(),
    'last_name': 'Bowen',
    'first_name': 'Charlie',
}
db_user = User (**user)
db_user.save()

我会用这个代替：

db_user = User(
    email = 'wijgowol@kogun.gi',
    last_name = 'Bowen',
    first_name = 'Charlie'
).save()

编辑： 根据我的评论。

此外，如果注册日期总是在创建用户时设置，那么为什么不直接使用 _id 的 timestamp？

编辑2： 根据 API 参考，您需要使用 Complex DateTimeField 常规 DatetimeField 不能很好地处理微秒。

来自 DatetimeField 参考：

Note: Microseconds are rounded to the nearest millisecond.

Pre UTC microsecond support is effectively broken. Use ComplexDateTimeField if you need accurate microsecond support.

mongodb 中的测试数据 - 时间变化

Testing Data in mongodb - time varies

python

datetime

pytest

mongoengine

python-3.x