step-6-adding-redis.md

Step 6: Adding Redis

If you check Testcontainers' modules, you'll see that there is no Redis module (at least not yet ;)): https://github.com/testcontainers/testcontainers-java/tree/1.8.1/modules

But it doesn't mean you can't use the library if something is not wrapped with Testcontainers because you can do it yourself thanks to GenericContainer:
https://www.testcontainers.org/usage/generic_containers.html#benefits

But Redis is not JDBC based and we can't just add a property. Yet, the integration is trivial.

Rules? No thanks!

Testcontainers comes with first class support for JUnit, but in our app we want to have a single Redis instance shared between all tests. Luckily, there are the .start()/.stop() methods of GenericContainer to start or stop it manually.

Just add a static block to your AbstractIntegrationTest with the following code:

    static {
        GenericContainer redis = new GenericContainer("redis:3-alpine")
                .withExposedPorts(6379);
        redis.start();

        System.setProperty("spring.redis.host", redis.getContainerIpAddress());
        System.setProperty("spring.redis.port", redis.getFirstMappedPort() + "");
    }

Simple, huh?

Run the tests, now they should all pass.