testcontainers-integration-tests

Integration testing with real infrastructure components replaces brittle mocks by spinning up actual databases, Redis, and RabbitMQ instances inside Docker containers, ensuring your application interacts with live services exactly as it would in production.

You can set up integration tests for PostgreSQL and Redis in .NET by configuring Testcontainers within your xUnit test project to automatically provision and tear down isolated Docker containers for each test run.

Yes, you can use Testcontainers to validate RabbitMQ messaging integrations in xUnit by launching a live RabbitMQ instance in a Docker container, allowing you to test your messaging layers against the actual message broker infrastructure.

A key limitation of using Docker containers for .NET integration testing is the prerequisite requirement of a Docker environment, which may increase test execution time compared to lightweight mocks due to the overhead of provisioning real infrastructure components.

You should replace mock objects with real services for infrastructure testing to ensure your caching strategies, data access layers, and message queue integrations function correctly in a production-like environment, preventing false positives caused by mock discrepancies.