Django unit testing FileField and ImageField using ContentFile - django

Question

I am using Django 3.2
I have a model like this:
Foo class
class Foo(models.Model):
name = models.CharField(max_length=124)
owner = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
description = models.TextField()
bio = models.TextField()
attachment = models.FileField()
photo = models.ImageField()
recorded_date = models.DateField()
time_of_day = models.TimeField()
timestamp = models.DateTimeField()
duration = models.DurationField()
website = models.URLField()
pseudo_array = models.CharField(max_length=256)
pseudo_tags = models.CharField(max_length=128)
Snippet of Unit test
import glob
import os
import json
from datetime import datetime, timedelta
from django.utils.timezone import make_aware
from model_bakery import baker
from django.test import TestCase
from django.core.exceptions import ValidationError
from django.core.files.base import ContentFile
image_mock =ContentFile(b"R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==", name='photo.png')
file_mock = ContentFile("Some random text", name='archive.txt')
class TestModels(TestCase):
def setUp(self):
current_timestamp = datetime.now(timezone.utc)
self.foo = Foo.objects.create( name='Accepted Object',bio='For accepted testing',
owner=self.pattysmith,
description='Object for accepted testing',
attachment = file_mock,
photo = image_mock,
recorded_date = datetime.strptime('20200101','%Y%m%d'),
time_of_day = datetime.strptime('10:00','%H:%M'),
timestamp = make_aware(timezone.now().strptime('20200101 10:00','%Y%m%d %H:%M')),
duration = timedelta(days=20, hours=10),
website = 'https://www.accepted.com',
moderation_status=1,
pseudo_tags='approved,nice, accepted'
)
def tearDown(self):
Foo.objects.all().delete()
User.objects.all().delete()
for f in glob.glob("*.png"):
os.remove(f)
for f in glob.glob("*.txt"):
os.remove(f)
def test_change_moderated_char_field(self):
self.foo.name='My new name'
self.foo.save(update_fields=['name'])
# test for number of changed fields ...
When I run the test test_change_moderated_char_field I see that the file and image field names have changed - looks like Django is auto-generating the file names.
Here is what my console printout looks like:
moderated_field_current_field_value: 'My new name' != 'Accepted Object' for moderated field: name
moderated_field_current_field_value: /path/to/archive_Fo8NWLI.txt != /path/to/archive.txt for moderated field: attachment
moderated_field_current_field_value: /path/to/photo_mVEyGtI.png != /path/to/photo.png for moderated field: photo
######### changed_fields: ["name", "attachment", "photo"] #####
I am currently accessing the name of the file/image by accessing the path attribute on the field. How do I get the name of the file when it is actually uploaded (since some name mangling seems to be taking place?