Integration Testing

A common Paramixel pattern is:

1. create resources in Lifecycle.before
2. store them with Context#getStore()#put(...)
3. use them from descendants via findAncestor(...)#getStore()#get(...)
4. release them in Lifecycle.after

Example shape

Action action = Lifecycle.of(
        "environment",
        Direct.of("before", context -> {
            context.getStore().put("env", Value.of(startEnvironment()));
        }),
        Parallel.of(
                "tests",
                Direct.of("check A", context -> {
                    Environment env = context.findAncestor(1)
                            .getStore()
                            .get("env")
                            .map(Value::get)
                            .map(v -> (Environment) v)
                            .orElseThrow();
                }),
                Direct.of("check B", context -> {})),
        Direct.of("after", context -> {
            Environment env = context.getStore()
                    .remove("env")
                    .map(Value::get)
                    .map(v -> (Environment) v)
                    .orElseThrow();
            stopEnvironment(env);
        }));

Real examples

See:

• examples/testcontainers/kafka/KafkaExample.java
• examples/testcontainers/mongodb/MongoDBExample.java
• examples/testcontainers/nginx/NginxExample.java

These examples use Lifecycle, Store, and Cleanup to manage Testcontainers resources.