Testing Keycloak SPIs with Testcontainers — the part every tutorial skips

Most "here's how to write a custom Keycloak authenticator" posts end at mvn package . You get a class that implements Authenticator , a factory, a META-INF/services file, and a "drop the jar in providers/ and restart" instruction — and that's where the tutorial stops. Nobody shows you how to ac...

Source: [Dev.to](https://dev.to/jihedbfrart/testing-keycloak-spis-with-testcontainers-the-part-every-tutorial-skips-4loe)