The original title is: "Testing Keycloak SPIs with Testcontainers — the part every tutorial skips"

Short summary

A practical guide to integration-testing Keycloak SPIs using Testcontainers, covering the gap most tutorials skip. It shows how to boot a real Keycloak container, copy your built jar into providers/, and verify deployment via the admin REST API. Also covers testing event listener providers against a real Kafka broker and the Maven wiring needed to run these tests in the right lifecycle phase.

• •Boot real Keycloak in Testcontainers and verify SPI deployment via admin REST API
• •Use Wait.forHttp instead of log messages to avoid flaky CI tests
• •Integration-test event listeners against real Kafka to catch config errors mocks miss

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