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Clean Architecture: Use Cases Are NOT Services
Code Example
 • Valentina Jemuović
TDD: 1 unit test ≠ 1 class
TDD misconception: The class is the unit of isolation. That's wrong! Instead, the behavior is the unit of isolation.
 • Valentina Jemuović
Modern Hexagonal Architecture: Testing for Backend
How can we test the Backend?
 • Valentina Jemuović
Hexagonal Architecture: Your Driven Ports Are Leaking Infrastructure
Clean Interfaces, Leaky Abstractions. Your driven ports look clean — but they're leaking infrastructure into your domain. Your domain is coupled to…
 • Valentina Jemuović
Unit Tests are NOT enough!
You have 100% coverage. All the unit tests are passing. But then, in production, a horrible bug happened.
 • Valentina Jemuović
DDD + Clean Architecture: Where to Put Validation Logic
Should validation go in the API, application layer, or domain?
 • Valentina Jemuović
Hexagonal Architecture: Ports Are NOT Just Interfaces
Code Example
 • Valentina Jemuović
TDD: If Your Test Never Fails, It’s Broken
The RED step
 • Valentina Jemuović
Clean Architecture: DTOs Are NOT Just Wrappers
Code Example
 • Valentina Jemuović
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Optivem Journal
TDD | Hexagonal Architecture | Clean Architecture
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