import pytest
from django.core.files.storage import default_storage
from unittest.mock import MagicMock
from unittest.mock import patch

@pytest.mark.django_db
@patch('django.core.files.storage.default_storage.url')
def test_url_video(file,mock_url):
    mock_url.return_value = '/path/to/file.mp4'

    url = file.url_video()

    assert url == '/path/to/file.mp4'
    mock_url.assert_called_once_with('/path/to/file.mp4')