django-testcontainers-plus 0.1.3

A plug-and-play testcontainers integration for Django - supports databases, Redis, MinIO, and more

Django Testcontainers Plus

A plug-and-play testcontainers integration for Django

Why Django Testcontainers Plus?

Testing Django applications often requires external services like PostgreSQL, Redis, or S3. Django Testcontainers Plus makes this effortless by:

• Zero Configuration: Automatically detects your database and service needs from Django settings
• Plug and Play: Install, add to settings, and go - no manual container management
• Database Agnostic: Supports PostgreSQL, MySQL, MariaDB, and more
• Beyond Databases: Redis for caching, MinIO for S3, and other services
• Dual Compatibility: Works with both Django's test runner and pytest
• Smart Defaults: Sensible defaults with full customization when needed

Installation

Basic Installation

# Using uv (recommended)
uv add django-testcontainers-plus

# Using pip
pip install django-testcontainers-plus

Optional Extras for containers

# MySQL/MariaDB support
pip install django-testcontainers-plus[mysql]

# Redis support
pip install django-testcontainers-plus[redis]

# Or install both
pip install django-testcontainers-plus[all]

Note Postgres works by default so doesn't need to be installed like the above

Quick Start

Option 1: Django Test Runner (Minimal Setup)

# settings.py
TEST_RUNNER = 'django_testcontainers_plus.runner.TestcontainersRunner'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'myapp',
    }
}

That's it! Run your tests:

python manage.py test

PostgreSQL will automatically start in a container, run your tests, and clean up.

Option 2: pytest-django

# conftest.py
pytest_plugins = ['django_testcontainers_plus.pytest_plugin']

# settings.py
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'test',
    }
}

Run your tests:

pytest

Supported Services

Databases

• PostgreSQL - Auto-detected from django.db.backends.postgresql
• MySQL/MariaDB - Auto-detected from django.db.backends.mysql
• MongoDB - Coming soon
• SQL Server - Coming soon

Other Services

• Redis - Auto-detected from cache/Celery settings
• MinIO - S3-compatible storage (coming soon)
• Mailhog - Email testing (coming soon)
• Elasticsearch - Search (coming soon)

Configuration

Zero Configuration (Auto-Detection)

Django Testcontainers Plus automatically detects services from your settings:

# PostgreSQL auto-detected
DATABASES = {
    'default': {'ENGINE': 'django.db.backends.postgresql', 'NAME': 'test'}
}

# Redis auto-detected
CACHES = {
    'default': {'BACKEND': 'django.core.cache.backends.redis.RedisCache'}
}

# Celery Redis auto-detected
CELERY_BROKER_URL = 'redis://localhost:6379/0'

Custom Configuration

Override defaults when needed:

TESTCONTAINERS = {
    'postgres': {
        'image': 'postgres:16-alpine',
        'username': 'testuser',
        'password': 'testpass',
        'dbname': 'testdb',
    },
    'redis': {
        'image': 'redis:7-alpine',
    },
}

Disable Auto-Detection

TESTCONTAINERS = {
    'postgres': {
        'auto': False,  # Disable auto-detection
        'enabled': True,  # But explicitly enable it
    },
}

Examples

PostgreSQL with Django Test Runner

# settings.py
TEST_RUNNER = 'django_testcontainers_plus.runner.TestcontainersRunner'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'myapp',
    }
}

# Optional: Customize PostgreSQL version
TESTCONTAINERS = {
    'postgres': {
        'image': 'postgres:15',
    }
}

python manage.py test

MySQL with pytest

# conftest.py
pytest_plugins = ['django_testcontainers_plus.pytest_plugin']

# settings.py
DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'NAME': 'test',
    }
}

pytest

PostgreSQL + Redis

# settings.py
TEST_RUNNER = 'django_testcontainers_plus.runner.TestcontainersRunner'

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'test',
    }
}

CACHES = {
    'default': {
        'BACKEND': 'django.core.cache.backends.redis.RedisCache',
        'LOCATION': 'redis://localhost:6379/0',
    }
}

Both PostgreSQL and Redis containers will start automatically!

How It Works

1. Detection: Scans your Django settings for database engines and service backends
2. Configuration: Merges detected needs with any custom TESTCONTAINERS config
3. Startup: Starts necessary containers before tests run
4. Injection: Updates Django settings with container connection details
5. Cleanup: Stops and removes containers after tests complete

Troubleshooting

Missing Dependency Errors

If you see an error like this:

======================================================================
MySQL Support Not Installed
======================================================================

MySQL was detected in your Django settings:
  → DATABASES['default']['ENGINE']

To enable MySQL support, install the required dependencies:
  pip install django-testcontainers-plus[mysql]

Or install all providers:
  pip install django-testcontainers-plus[all]
======================================================================

What happened? Django Testcontainers Plus detected that you're using MySQL in your settings, but the MySQL client library (mysql-connector-python) isn't installed.

Solution: Install the extra for your database:

# For MySQL/MariaDB
pip install django-testcontainers-plus[mysql]

# For Redis
pip install django-testcontainers-plus[redis]

# Or install everything
pip install django-testcontainers-plus[all]

Common Issues

Q: Why do I need extras for some databases but not Postgres?

A: PostgreSQL works without extras because the base testcontainers package includes PostgreSQL support. MySQL and Redis require their respective Python client libraries.

Q: Can I disable auto-detection?

A: Yes! Set auto: False in your configuration:

TESTCONTAINERS = {
    'mysql': {
        'auto': False,  # Won't auto-detect MySQL
        'enabled': False,  # Explicitly disable
    }
}

Q: The error message says a service was detected, but I don't use it

A: Check your settings for Redis/MySQL references in:

• DATABASES - Database engines
• CACHES - Cache backends
• CELERY_BROKER_URL - Celery broker
• SESSION_ENGINE - Session storage

You can disable detection for that service with auto: False.

Q: Tests work locally but fail in CI

A: Make sure your CI environment has:

1. Docker available (most CI providers include it)
2. The correct extras installed: pip install django-testcontainers-plus[all]
3. Sufficient permissions to run Docker containers

Development

This project uses uv for package management.

# Clone the repository
git clone https://github.com/woodywoodster/django-testcontainers-plus
cd django-testcontainers-plus

# Install dependencies (including all optional database clients)
uv sync --all-extras --dev

# Run tests
uv run pytest

# Run linting
uv run ruff check .

# Run type checking
uv run mypy src/

Roadmap

• PostgreSQL support
• MySQL/MariaDB support
• Redis support
• Django test runner integration
• pytest plugin
• MongoDB support
• MinIO (S3) support
• Mailhog support
• Elasticsearch support
• RabbitMQ support
• Container reuse between test runs
• Parallel test support
• Full documentation site

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Credits

Built with testcontainers-python.