Harry Percival's guest appearances

Harry Percival

Test & Code

David Heinemeier Hansson

Matt Harrison

Abe Gong

Nicholas Tollervey

Kent Beck

Joel Grus

Angie Jones

Scott Shawcroft

James Smith

Reuven Lerner

Brett Cannon

Ned Batchelder

Michael Kennedy

Anthony Shaw

Travis CI

OwlTail

Harry Percival has completed his second book, "Architecture Patterns with Python". So of course we talk about the book, also known as "Cosmic Python". We also discuss lots of testing topics, especially related to larger systems and systems involving third party interfaces and APIs. Topics   Harry's new book, "Architecture Patterns with Python". a.k.a. Cosmic Python  TDD : Test Driven Development Test Pyramid Tradeoffs of different architectural choices Mocks and their pitfalls Avoiding mocks Separating conceptual business logic Dependency injection Dependency inversion Identifying external dependencies Interface adapters to mimize the exposed surface area of external dependencies London School vs Classic/Detroit School of TDD Testing strategies for testing external REST APIs Special Guest: Harry Percival.Sponsored By:Oxylabs: Visit oxylabs.io/testandcode to find out more about their services and to apply for a free trial of their Next-Generation Residential Proxies.Links:Cosmic Python - Simple Patterns for Building Complex ApplicationsArchitecture Patterns with Python - on AmazonHarry Percival (@hjwp) / TwitterBob Gregory (@bob_the_mighty) / Twittervcrpy · PyPIWriting tests for external API callsStop Using Mocks (for a while) - Harry's PyCon talk

Harry Percival has completed his second book, "Architecture Patterns with Python". So of course we talk about the book, also known as "Cosmic Python". We also discuss lots of testing topics, especially related to larger systems and systems involving third party interfaces and APIs. Topics <ul> <li>Harry's new book, "Architecture Patterns with Python". a.k.a. Cosmic Python </li> <li>TDD : Test Driven Development</li> <li>Test Pyramid</li> <li>Tradeoffs of different architectural choices</li> <li>Mocks and their pitfalls</li> <li>Avoiding mocks</li> <li>Separating conceptual business logic</li> <li>Dependency injection</li> <li>Dependency inversion</li> <li>Identifying external dependencies</li> <li>Interface adapters to mimize the exposed surface area of external dependencies</li> <li>London School vs Classic/Detroit School of TDD</li> <li>Testing strategies for testing external REST APIs</li> </ul>Special Guest: Harry Percival.Sponsored By:<ul><li><a href="https://oxylabs.io/testandcode" rel="nofollow" target="_blank">Oxylabs</a>: <a href="https://oxylabs.io/testandcode" rel="nofollow" target="_blank">Visit oxylabs.io/testandcode to find out more about their services and to apply for a free trial of their Next-Generation Residential Proxies.</a></li></ul>Links:<ul><li><a href="https://www.cosmicpython.com/" rel="nofollow" target="_blank">Cosmic Python - Simple Patterns for Building Complex Applications</a></li><li><a href="https://amzn.to/39fZbve" rel="nofollow" target="_blank">Architecture Patterns with Python - on Amazon</a></li><li><a href="https://twitter.com/hjwp/" rel="nofollow" target="_blank">Harry Percival (@hjwp) / Twitter</a></li><li><a href="https://twitter.com/bob_the_mighty" rel="nofollow" target="_blank">Bob Gregory (@bob_the_mighty) / Twitter</a></li><li><a href="https://pypi.org/project/vcrpy/" rel="nofollow" target="_blank">vcrpy · PyPI</a></li><li><a href="https://www.cosmicpython.com/blog/2020-01-25-testing_external_api_calls.html" rel="nofollow" target="_blank">Writing tests for external API calls</a></li><li><a href="https://us.pycon.org/2020/schedule/presentation/118/" rel="nofollow" target="_blank">Stop Using Mocks (for a while) - Harry's PyCon talk</a></li></ul>

102: Cosmic Python, TDD, testing and external dependencies  - Harry Percival

 Intro to Harry Percival, his background and story of how he got into TDD and ended up writing a book Comparing using unittest and pytest with applicability to testing django projects.  Functional end to end testing with selenium. The django test client for middle level tests. test isolation django and isolated unit tests unit tests vs integration tests Testing done by the development team without an external QA Double loop TDD: Functional test first, then unit tests Spikes: investigations without tests Harry's experience with having a freely available web version of a book that is also intended to be sold.  Update: Comment from Harry Percival on 19-Jan-2014 I might have been a bit down on unit tests vs functional tests in that "unit tests never fail comment". Not true at all, particularly as we've just been thru upgrading django on our core system, and the unit tests really saved our bacon on that one... Links  Test-Driven Development with Python  Obey the Testing Goat - Harry's site dedicated to the book and related posts. Python Testing with unittest, nose, pytest  Gary Bernhardt's talk, Boundaries talk including a discussion of "Functional Core, Imperative Shell". Video of Boundaries talk on youtube Special Guest: Harry Percival.

<ul> <li>Intro to Harry Percival, his background and story of how he got into TDD and ended up writing a <a href="http://amzn.to/1SqW1t3" rel="nofollow" target="_blank">book</a></li> <li>Comparing using unittest and pytest with applicability to testing django projects. </li> <li>Functional end to end testing with selenium.</li> <li>The django test client for middle level tests.</li> <li>test isolation</li> <li>django and isolated unit tests</li> <li>unit tests vs integration tests</li> <li>Testing done by the development team without an external QA</li> <li>Double loop TDD: Functional test first, then unit tests</li> <li>Spikes: investigations without tests</li> <li>Harry's experience with having a freely available web version of a book that is also intended to be sold.</li> </ul> Update: Comment from Harry Percival on 19-Jan-2014 I might have been a bit down on unit tests vs functional tests in that "unit tests never fail comment". Not true at all, particularly as we've just been thru upgrading django on our core system, and the unit tests really saved our bacon on that one... <h2>Links</h2> <ul> <li><a href="http://amzn.to/1SqW1t3" rel="nofollow" target="_blank">Test-Driven Development with Python</a> </li> <li><a href="http://pythontesting.net/obey-the-testing-goat" rel="nofollow" target="_blank">Obey the Testing Goat</a> - Harry's site dedicated to the book and related posts.</li> <li><a href="http://pythontesting.net/book" rel="nofollow" target="_blank">Python Testing with unittest, nose, pytest</a> </li> <li>Gary Bernhardt's talk, <a href="http://pythontesting.net/boundaries-talk" rel="nofollow" target="_blank">Boundaries talk</a> including a discussion of "Functional Core, Imperative Shell".</li> <li>Video of Boundaries talk <a href="http://pythontesting.net/boundaries-talk-youtube" rel="nofollow" target="_blank">on youtube</a></li> </ul>Special Guest: Harry Percival.

9: Harry Percival : Testing Web Apps with Python, Selenium, Django