
About
Django testing strategies with pytest-django, TDD methodology, factory_boy, mocking, coverage, and testing Django REST Framework APIs.
name: django-tdd description: Django testing strategies with pytest-django, TDD methodology, factory_boy, mocking, coverage, and testing Django REST Framework APIs. origin: ECC
Django Testing with TDD
Test-driven development for Django applications using pytest, factory_boy, and Django REST Framework.
When to Activate
- Writing new Django applications
- Implementing Django REST Framework APIs
- Testing Django models, views, and serializers
- Setting up testing infrastructure for Django projects
TDD Workflow for Django
Red-Green-Refactor Cycle
# Step 1: RED - Write failing test
def test_user_creation():
user = User.objects.create_user(email='test@example.com', password='testpass123')
assert user.email == 'test@example.com'
assert user.check_password('testpass123')
assert not user.is_staff
# Step 2: GREEN - Make test pass
# Create User model or factory
# Step 3: REFACTOR - Improve while keeping tests green
Setup
pytest Configuration
# pytest.ini
[pytest]
DJANGO_SETTINGS_MODULE = config.settings.test
testpaths = tests
python_files = test_*.py
python_classes = Test*
python_functions = test_*
addopts =
--reuse-db
--nomigrations
--cov=apps
--cov-report=html
--cov-report=term-missing
--strict-markers
markers =
slow: marks tests as slow
integration: marks tests as integration tests
Test Settings
# config/settings/test.py
from .base import *
DEBUG = True
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.sqlite3',
'NAME': ':memory:',
}
}
# Disable migrations for speed
class DisableMigrations:
def __contains__(self, item):
return True
def __getitem__(self, item):
return None
MIGRATION_MODULES = DisableMigrations()
# Faster password hashing
PASSWORD_HASHERS = [
'django.contrib.auth.hashers.MD5PasswordHasher',
]
# Email backend
EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
# Celery always eager
CELERY_TASK_ALWAYS_EAGER = True
CELERY_TASK_EAGER_PROPAGATES = True
conftest.py
# tests/conftest.py
import pytest
from django.utils import timezone
from django.contrib.auth import get_user_model
User = get_user_model()
@pytest.fixture(autouse=True)
def timezone_settings(settings):
"""Ensure consistent timezone."""
settings.TIME_ZONE = 'UTC'
@pytest.fixture
def user(db):
"""Create a test user."""
return User.objects.create_user(
email='test@example.com',
password='testpass123',
username='testuser'
)
@pytest.fixture
def admin_user(db):
"""Create an admin user."""
return User.objects.create_superuser(
email='admin@example.com',
password='adminpass123',
username='admin'
)
@pytest.fixture
def authenticated_client(client, user):
"""Return authenticated client."""
client.force_login(user)
return client
@pytest.fixture
def api_client():
"""Return DRF API client."""
from rest_framework.test import APIClient
return APIClient()
@pytest.fixture
def authenticated_api_client(api_client, user):
"""Return authenticated API client."""
api_client.force_authenticate(user=user)
return api_client
Factory Boy
Factory Setup
# tests/factories.py
import factory
from factory import fuzzy
from datetime import datetime, timedelta
from django.contrib.auth import get_user_model
from apps.products.models import Product, Category
User = get_user_model()
class UserFactory(factory.django.DjangoModelFactory):
"""Factory for User model."""
class Meta:
model = User
email = factory.Sequence(lambda n: f"user{n}@example.com")
username = factory.Sequence(lambda n: f"user{n}")
password = factory.PostGenerationMethodCall('set_password', 'testpass123')
first_name = factory.Faker('first_name')
last_name = factory.Faker('last_name')
is_active = True
class CategoryFactory(factory.django.DjangoModelFactory):
"""Factory for Category model."""
class Meta:
model = Category
name = factory.Faker('word')
slug = factory.LazyAttribute(lambda obj: obj.name.lower())
description = factory.Faker('text')
class ProductFactory(factory.django.DjangoModelFactory):
"""Factory for Product model."""
class Meta:
model = Product
name = factory.Faker('sentence', nb_words=3)
slug = factory.LazyAttribute(lambda obj: obj.name.lower().replace(' ', '-'))
description = factory.Faker('text')
price = fuzzy.FuzzyDecimal(10.00, 1000.00, 2)
stock = fuzzy.FuzzyInteger(0, 100)
is_active = True
category = factory.SubFactory(CategoryFactory)
created_by = factory.SubFactory(UserFactory)
@factory.post_generation
def tags(self, create, extracted, **kwargs):
"""Add tags to product."""
if not create:
return
if extracted:
for tag in extracted:
self.tag
Compatible Tools
Claude CodeCursor
Tags
Testing

