Integration Testing

A common Paramixel pattern is:

1. create resources in Lifecycle.before
2. store them with Context#setAttachment(...)
3. use them from descendants via findAttachment(...) or findContext(...)
4. release them in Lifecycle.after

Example shape

Action action = Lifecycle.of(
        "environment",
        Direct.of("before", context -> context.setAttachment(startEnvironment())),
        Parallel.of(
                "tests",
                Direct.of("check A", context -> {
                    Environment env = context.findAttachment(1)
                            .flatMap(a -> a.to(Environment.class))
                            .orElseThrow();
                }),
                Direct.of("check B", context -> {})),
        Direct.of("after", context -> stopEnvironment(context.removeAttachment())));

Real examples

See:

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

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