Modern microservice architectures demand testing against real infrastructure — yet most teams still rely on brittle mock-based setups that hide failures until late stages. TestContainers brings production-like infrastructure inside JUnit, spinning up real databases, messaging systems, and cloud services on demand for every test run. This container-first approach delivers deterministic, CI-friendly, and infinitely scalable microservice testing without shared environment dependencies. The session will highlight proven patterns, pitfalls to avoid, and a practical migration roadmap for teams moving from mocks to containerized testing. Attendees will walk away with techniques to boost reliability and release velocity without compromising innovation.

• Realistic API Testing: Utilizing real databases and cloud services for testing, rather than mocks or in-memory alternatives.
• Ephemeral Environments: Creating clean, throwaway, and containerized test environments, ensuring test isolation and repeatability.
• Integration: Seamlessly integrating Testcontainers with popular testing frameworks and CI/CD tools like JUnit, Spring Boot Test, RestAssured, GitHub Actions, and Jenkins.
• Service Communication Testing: Addressing testing for components like Kafka and RabbitMQ within the microservice landscape.