k-photos/crates/adapters/event-transport/src/tests.rs

use crate::{EventPublisherAdapter, Transport};
use async_trait::async_trait;
use domain::{
    errors::DomainError, events::DomainEvent, ports::EventPublisher, value_objects::SystemId,
};
use std::sync::{Arc, Mutex};

struct RecordingTransport {
    messages: Arc<Mutex<Vec<(String, Vec<u8>)>>>,
}

#[async_trait]
impl Transport for RecordingTransport {
    async fn publish_bytes(&self, subject: &str, bytes: &[u8]) -> Result<(), DomainError> {
        self.messages
            .lock()
            .unwrap()
            .push((subject.to_string(), bytes.to_vec()));
        Ok(())
    }
}

#[tokio::test]
async fn adapter_publishes_with_correct_subject() {
    let messages = Arc::new(Mutex::new(Vec::new()));
    let adapter = EventPublisherAdapter::new(RecordingTransport {
        messages: messages.clone(),
    });

    let event = DomainEvent::JobCompleted {
        job_id: SystemId::new(),
        timestamp: domain::value_objects::DateTimeStamp::now(),
    };

    adapter.publish(&event).await.unwrap();

    let recorded = messages.lock().unwrap();
    assert_eq!(recorded.len(), 1);
    assert_eq!(recorded[0].0, "jobs.completed");
}

#[tokio::test]
async fn published_bytes_are_valid_json() {
    let messages = Arc::new(Mutex::new(Vec::new()));
    let adapter = EventPublisherAdapter::new(RecordingTransport {
        messages: messages.clone(),
    });

    let event = DomainEvent::AssetIngested {
        asset_id: SystemId::new(),
        owner_user_id: SystemId::new(),
        timestamp: domain::value_objects::DateTimeStamp::now(),
    };

    adapter.publish(&event).await.unwrap();

    let recorded = messages.lock().unwrap();
    let payload: event_payload::EventPayload =
        serde_json::from_slice(&recorded[0].1).expect("should be valid JSON");
    assert_eq!(payload.subject(), "assets.ingested");
}