Test-Driven Development with Python

Harry Percival

ISBN 10: 1098148711 / ISBN 13: 9781098148713

Published by O'Reilly Media, US, 2025

About this Item

The third edition of this trusted guide demonstrates the practical advantages of test-driven development (TDD) with Python and describes how to develop a real web application. You'll learn how to write and run tests before building each part of your app and then develop the minimum amount of code required to pass those tests. The result? Clean code that works.In the process, author Harry Percival teaches software and web developers the basics of Django, Selenium, Git, JavaScript, and Mock libraries, along with current web development techniques. This book-updated for Python 3.14 and Django 4-clearly demonstrates how TDD encourages simple designs and inspires confidence.Fully updated, this third edition addresses:The TDD workflow, including the unit test/code cycle and refactoringUnit tests for classes and functions and functional tests for user interactions within the browserMock objects and the pros and cons of isolated versus integrated testsTesting and automation of deployments with a staging serverTests applied to the third-party plug-ins you integrate into your siteAutomatic tests using a continuous integration environmentUsing TDD to build a REST API with a JavaScript frontend interface.

Seller Inventory # LU-9781098148713

Bibliographic Details

• Title: Test-Driven Development with Python
• Publisher: O'Reilly Media, US
• Publication Date: 2025
• Language: English
• ISBN 10: 1098148711
• ISBN 13: 9781098148713
• Binding: Paperback
• Edition: 3rd.
• Condition: New
• Dimensions: 17.78W x 5.08H x 23.34D centimeters 17.78 centimeters width by 5.08 centimeters height by 23.34 centimeters depth

About this title

Synopsis

The third edition of this trusted guide shows you how to apply test-driven development (TDD) to building real-world web applications with Python. By writing tests before building each part of your app—and then creating just enough code to pass them—you'll learn how TDD leads to clean, reliable, and maintainable software.

Author Harry J.W. Percival takes you through a practical, end-to-end example of web development using Python 3.14 and Django 5. Along the way, you'll explore tools like Selenium, JavaScript, Git, and mocking, and discover how TDD supports better design decisions, encourages continuous improvement, and instills confidence in your codebase. Whether you're a professional developer or just transitioning into web development, this book offers hands-on experience with modern testing workflows and architecture.

• Follow the full TDD workflow, from writing tests first to refactoring with confidence
• Write unit tests for core logic and functional tests for browser-based interactions
• Use mock objects to isolate external systems and simplify integration
• Package your application using Docker
• Automate deployments and test your code in a staging environment
• Validate third-party plug-ins and dependencies within your test suite
• Set up continuous integration to run your tests automatically
• Enrich your frontend with test-driven JavaScript

About the Author

After an idyllic childhood spent playing with BASIC on French 8-bit computers like the Thomson T-07 whose keys go "boop" when you press them, Harry spent a few years being deeply unhappy as a management consultant. Soon he rediscovered his true geek nature, and was lucky enough to fall in with a bunch of XP fanatics, working on the pioneering but sadly defunct Resolver One spreadsheet. He now works at PythonAnywhere LLP, and spreads the gospel of TDD world-wide at talks, workshops and conferences, with all the passion and enthusiasm of a recent convert.