Add tests

Fixes #1 (closed)

.gitlab-ci.yml

@@ -3,3 +3,9 @@ include:
   - remote: https://git-cdn.e15r.co/gitlab/ci/wordpress/-/raw/main/plugins/templates/cache.yml
   - remote: https://git.ethitter.com/gitlab/ci/wordpress/-/raw/add/redis/plugins/templates/before-script-redis.yml
   - remote: https://git.ethitter.com/gitlab/ci/wordpress/-/raw/add/redis/plugins/templates/matrix-redis.yml
+
+connect:
+  # Connect to PostgreSQL database as user postgres, without password
+  image: redis
+  script:
+  - redis-cli -h redis PING