Testing Kotlin Coroutines

on YouTube ↗44m

" summary

Shows concrete patterns for Android and backend: convert blocking calls by adding suspend and wrapping callbacks with suspendCancellableCoroutine, offload blocking work with withContext(Dispatchers.IO) (default IO pool 64 threads), create scopes with SupervisorJob and exception handlers, limit concurrency with flow flatMapMerge, use supervisorScope vs coroutineScope for failure isolation. Tests use runTest virtual time so delays advance instantly and allow precise assertions that parallel async halves runtime and sequential doubles it.

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" chapters (15)

1. 0:00Introduction
2. 9:50Practical use cases
3. 11:20Migrating to Coroutines
4. 13:10Application Layers
5. 14:05Data Layer
6. 17:40Dispatchers IO
7. 20:35Dispatchers Default
8. 22:00Domain Layer
9. 26:10Exceptions in async
10. 27:35Timeout
11. 28:00Presentation Layer
12. 30:10Scope
13. 34:10Exception Handler
14. 36:05Testing
15. 41:17Conclusion

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