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 DevelopmentTest PyramidTradeoffs of different architectural choicesMocks and their pitfallsAvoiding mocksSeparating conceptual business logicDependency injectionDependency inversionIdentifying external dependenciesInterface adapters to mimize the exposed surface area of external dependenciesLondon School vs Classic/Detroit School of TDDTesting strategies for testing external REST APIsLinks: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

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