test_topic.py

import datetime

import factory.django
import pytest
from freezegun import freeze_time
from django.contrib.auth.models import User

from forum.models import Topic


class UserFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = User

    email = factory.Faker('email')
    username = factory.Faker('user_name')


class TopicFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = Topic

    title = factory.Faker('sentence')
    created_by = factory.SubFactory(UserFactory)



@pytest.mark.django_db
def describe_topic():
    def exists():
        TopicFactory()

    @freeze_time(datetime.datetime.now())
    def saves_its_fields():
        topic = TopicFactory()

        sut = Topic.objects.get(pk=topic.id)

        assert sut.title == topic.title
        assert sut.created_by == topic.created_by
        assert sut.created_at == datetime.datetime.now(datetime.timezone.utc)

    def is_registered_in_the_django_admin():
        from django.contrib.admin.sites import site as admin_site
        assert admin_site.is_registered(Topic)