Published

Is TDD dead? [Part III] (feedback) https://www.youtube.com/watch?v=YNw4baDz6WA === Kent Feedback instant feedback is not always possible how far can we? how frequently feedback? 100ms – minutes fidelity of feedback green + prod -> % no crash different kinds of software different personalities overhead lifespan years & probabilities === Martin there is more than one thing you want feedback on User needs “is this software doing something useful for the user?” “how do I want to visualise the UI”...

Is TDD Dead? 4: Costs of Testing https://www.youtube.com/watch?v=dGtasFJnUxI === David other half of trade-offs things are not free pressures and nudgings over-testing “never write a single line of prod code without writing a test” multiples of lines of test code per prod code what is the right ratio? how many 9’s ? === Kent delta-coverage how much does a test test which none others do if you have multiple tests covering one behaviour, you have coupling...

Is TDD dead? 5: Answering Questions https://www.youtube.com/watch?v=gWD6REVeKW4 === What is an example of an open source project that does TDD well? @David common code open source only extracts commons, libraries only personal experiences of private apps @Martin takes a lot of effort to understand the code bases where these problems occur team of 12 for a year when you’re not working on it @Kent JUnit project @David Are we scientific? virtually impossible to true/false it’s still worth debating...

Software Architecture vs. Code • Simon Brown https://www.youtube.com/watch?v=GAFZcYlO5S0 Book_ Software Architecture for Developers - Simon Brown Paper_ Architectural Blueprints The 4+1 View Model of Software Architecture - Philippe Kruchten Book_ Just Enough Software Architecture - George Fairbanks Paper_ Why Most Unit Testing is Waste - James O Coplien Article_ Test-induced design damage - David Heinemeier Hansson C4 model eg. deployment cares about containers...

TDD, Where Did It All Go Wrong - Ian Cooper https://www.youtube.com/watch?v=EZ05e7EMOLM Book_ Refactoring - Martin Fowler Book_ Refactoring to Patterns - Joshua Kerievsky Book_ Test Driven Development_ By Example - Kent Beck Article_ Is TDD Dead_ - Martin Fowler Ian Cooper - TDD, Where Did It All Go Wrong https://www.youtube.com/watch?v=EZ05e7EMOLM Trigger for writing test != new method != new class = requirement test api System Under Test (SUT) !...

The many meanings of event-driven architecture - Martin Fowler https://www.youtube.com/watch?v=STKCRSUsyP0 Article_ What do you mean by “Event-Driven”_ 4 patterns under the name of ‘Event Driven’ Event Notification + reverse coupling + first class + flexibility of adding - no overview in code events vs commands command: response, I want this to happen Event-carried State Transfer + decoupling + availability no more calls no dependency less calls reduce load - send all needed data - copying of data - eventual consistency...

Why Scaling Agile Doesn’t Work • Jez Humble https://www.youtube.com/watch?v=2zYxWEZ0gYg Article: The IT Measurement Inversion - Douglas Hubbard Paper: Black Swan Farming using Cost of Delay - Joshua J Arnold and Ozlem Yuce Book: Impact Mapping - Gojko Adzic Video: Better product definition with Lean UX and Design Thinking - Jeff Gothelf Paper: Online experimentation at Microsoft - Kohavi Book: A Practical Approach to Large-Scale Agile Development - Gruver, Young, Fulghum Book: Leading Change - John Kotter [[model-prioritization-cost-of-delay-vs-cost-to-build....

Event Sourcing You are doing it wrong by David Schmitz ( https://www.youtube.com/watch?v=GzrZworHpIk ) Paper_ The dark side of event souring_ managing data conversion - Michiel Overeen, Marten Spoor, Slinger Jansen [[filing-learning-notes/article-effective-aggregate-design-part-i-modeling-a-single-aggregate-vaughn-vernon.md|]]Article_ Effective Aggregate Design - Vaughn Vernon Book_ Versioning in an Event Sourced System - Greg Young Book_ Exploring CQRS and Event Sourcing - Microsoft resources for eventsourcing resources for eventsourcing The dark side of event souring: managing data conversion - Michiel Overeen, Marten Spoor, Slinger Jansen [[filing-learning-notes/article-effective-aggregate-design-part-i-modeling-a-single-aggregate-vaughn-vernon....

classic vs cqrs architecture

Code snippets from GregYoung 8 CQRS Class - YouTube public class DeactivateInventoryItemCommand { public readonly Guid InventoryItemId; public readonly string Comment; public DeactivateInventoryItemCommand (Guid id, string comment) { InventoryItemId = id; Comment = comment; } void DeactivateInventoryItem(Guid, string comment) CommandHandler contains no logic, logic is in domain object delegates to domain object public class DeactivateInventoryItemHandler : Handles<DeactivateInventoryItem> { public DeactivateInventoryItemHandler(InventoryItemRepository rep){} void Handle(DeactivateInventoryItem cmd) { var item = repository.GetById(cmd.Id); item.Deactivate(cmd.Comment); } } Application Services cross-cutting concerns (logging, authentication)...