Test-Driven Development with Python, Flask, and Docker
Learn how to build, test, and deploy a production-grade microservice powered by Python, Flask, and Docker!
"Code without tests is broken by design." - Jacob Kaplan-Moss
Learning Objectives
By the end of this course, you will be able to:
- Develop a RESTful API with Python, Flask, and Flask-RESTX
- Practice Test-Driven Development
- Test a Flask app with pytest
- Containerize Flask and Postgres inside a Docker container
- Run unit and integration tests with code coverage inside a Docker container
- Check your code for any code quality issues via a linter
- Configure GitLab CI for continuous integration and deployment
- Speed up a Docker-based CI build with Docker Cache
- Deploy Flask, Gunicorn, and Postgres to Heroku with Docker
- Parameterize test functions and mock functionality in tests with pytest
- Run tests in parallel with pytest-xdist
- Configure Flask-Admin with SQLAlchemy models
- Document a RESTful API with Swagger/OpenAPI
Tools and Technologies
Core
- Python
- Flask
- Docker
- Postgres
Extensions
- Flask-RESTX
- Flask-SQLAlchemy
- Gunicorn
- Swagger/OpenAPI
- Flask-Admin
Testing and Linting
- pytest
- Coverage.py
- Flake8
- Black
- isort
- HTTPie
Services
- GitLab
- Heroku
Prerequisites
This is not a beginner course. It's designed for the advanced-beginner -- someone with at least six months of web development experience. Before beginning, you should have some familiarity with the following topics. Refer to these resources for more info:
Topic | Resource |
---|---|
Docker | Get started with Docker |
Docker Compose | Get started with Docker Compose |
Flask | Flaskr TDD, Developing Web Applications with Python and Flask |
Demo
Info
- Current version: 3.1.0
- Last updated: November 25th, 2020
- Author: Michael Herman
What will you learn?
Part 1
In this first part, you'll learn how to develop a RESTful API with Python, the Flask web framework, Flask-RESTX, and Postgres. You'll containerize Flask and Postgres to run inside Docker containers and configure pytest in order to practice Test-Driven Development (TDD).
Part 2
In the second part, you'll start by deploying Flask, Gunicorn, and Postgres to Heroku with Docker. You'll then continue building out the RESTful API as you write unit and integration tests. Finally, we'll look at how to document the API with Swagger.
Table of Contents
Table of contents from Test-Driven Development with Python, Flask, and Docker:
Part 1
- Introduction
- Changelog
- Getting Started
- Docker Config
- Postgres Setup
- Pytest Setup
- Flask Blueprints
- RESTful Routes
Part 2
- Deployment
- Code Coverage and Quality
- Continuous Integration
- Continuous Delivery
- Remaining Routes
- Pytest Monkeypatching
- Advanced CI
- Flask Admin
- API Documentation
- Workflow
- Structure
- Next Steps
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