Integration Testing on JVM (opens in new tab)

Unit tests ensure functions work in isolation, but production incidents thrive at the boundaries. This post details a pragmatic, parallel-ready architecture for integration-testing JVM web services. Learn how to isolate tests into a dedicated module, safely simulate flaky external dependencies (like LLMs and Kafka) using Testcontainers and Mokksy, execute concurrent suites without flaky race conditions, and keep your full local test run under 5 minutes—all while running a fully booted, debugg...