Software richtig testen Ganz praktisch! Rainer Hahnekamp 6. März 2025 

About Me... https://www.youtube.com/ @RainerHahnekamp https://www.ng-news.com https://github.com/softarc-consulting/sheriff ● Rainer Hahnekamp ANGULARarchitects.io NgRx Team (Trusted Collaborator) ● Developer / Trainer / Speaker @RainerHahnekamp Workshops NgRx • Testing • Spring • Quality 

RainerHahnekamp Agenda 1. Testing Types 2. Testing Strategies 3. Live Coding 

RainerHahnekamp Testing Types 

RainerHahnekamp Testing Terms are not specified 

Unit Tests Integration & Component Tests End-to-End (E2E) Tests 

Component Service Service Service Directive Service Component Pipe Service Unit Test 

Component Service Service Service Directive Service Component Pipe Service ~ Component Test 

Component Service Service Service Directive Service Component Pipe Service Integration Test 

E2E Test 

RainerHahnekamp Testing Strategies 

RainerHahnekamp Pros & Cons Unit Tests ✅ Fast ✅ Exploratory ✅ Bug easy to find ✅ Encore good Design ⛔ No Refactoring ⛔ High Maintainability ⛔ Low Coverage ⛔ Low Confidence Integration Tests ✅ High Coverage ✅ Support Refactoring ✅ Lower Maintenance ✅ High Confidence ⛔ Difficult Setup ⛔ Slower than Unit Tests End-to-End ✅ Great DX ✅ Highest ROI ✅ Real Environment ✅ No Technical Challenges ● CD, Async, DOM Events ⛔ Very Slow ⛔ High Coupling ⛔ Full E2E not always possible 

The Right Balance "Fingerspitzengefühl" 

RainerHahnekamp Is TDD possible? 

Spotify - Honeycomb Kent Dodds' Trophy 

RainerHahnekamp Jeremy Elbourn: Angular Lead Angular Q&A Session September 2024 As close to the real-world as practical. Services as Dependencies - Don't replace them - Try to come up with a fake - Last resort: Use a Mock 

Coding Time