Testing .NET 6 Applications: Integration Testing with WebApplicationFactory

Unit tests are not enough. Integration tests verify your app works end-to-end, including middleware, dependency injection, and database logic. `WebApplicationFactory` spins up an in-memory test host. Setup Customizing Services Replace the real database with an in-memory one. Key Takeaways Use **Testcontainers** (covered earlier) for real SQL testing. Check HTTP status codes, response bodies, and headers.

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