completed local setup with compose

tests/integration/events/test_debug.py

@@ -0,0 +1,98 @@
+import asyncio
+
+import pytest
+
+from libs.events.base import EventPayload
+from libs.events.nats_bus import NATSEventBus
+from libs.schemas.events import DocumentIngestedEventData
+
+
+@pytest.mark.asyncio
+async def test_nats_bus_class():
+    """Test NATSEventBus class within pytest."""
+
+    import time
+
+    unique_suffix = int(time.time())
+    stream_name = f"PYTEST_DEBUG_STREAM_{unique_suffix}"
+
+    print(f"\nStarting NATSEventBus with stream {stream_name}...")
+    bus = NATSEventBus(
+        servers="nats://localhost:4222",
+        stream_name=stream_name,
+        consumer_group="test-debug-group",
+    )
+
+    await bus.start()
+    print("Bus started.")
+
+    # Clean up (just in case)
+    try:
+        await bus.js.delete_stream(stream_name)
+    except Exception:
+        pass
+    await bus._ensure_stream_exists()
+
+    # Wait for stream to be ready
+    await asyncio.sleep(2)
+
+    try:
+        info = await bus.js.stream_info(stream_name)
+        print(f"Stream info: {info.config.subjects}")
+    except Exception as e:
+        print(f"Failed to get stream info: {e}")
+
+    # Setup subscriber
+    received_event = asyncio.Future()
+
+    async def handler(topic, event):
+        print(f"Handler received event: {event.event_id}")
+        if not received_event.done():
+            received_event.set_result(event)
+
+    await bus.subscribe("doc.ingested", handler)
+
+    print("Publishing message...")
+
+    data = DocumentIngestedEventData(
+        doc_id="test-doc-123",
+        filename="test.pdf",
+        mime_type="application/pdf",
+        size_bytes=1024,
+        source="upload",
+        kind="invoice",
+        storage_path="s3://test-bucket/test.pdf",
+        checksum_sha256="a" * 64,
+    )
+
+    payload = EventPayload(
+        data=data.model_dump(mode="json"),
+        actor="tester",
+        tenant_id="tenant-1",
+        schema_version="1.0",
+    )
+    payload.event_id = "evt-debug-1"
+
+    success = await bus.publish("doc.ingested", payload)
+    print(f"Published: {success}")
+
+    try:
+        result = await asyncio.wait_for(received_event, timeout=5.0)
+        print(f"Received event: {result.event_id}")
+        assert result.event_id == "evt-debug-1"
+        assert result.data["doc_id"] == "test-doc-123"
+    except TimeoutError:
+        print("Timeout waiting for event")
+        raise
+
+    await bus.stop()
+    print("Bus stopped.")
+
+    # Cleanup stream
+    try:
+        nc = await nats.connect("nats://localhost:4222")
+        js = nc.jetstream()
+        await js.delete_stream(stream_name)
+        await nc.close()
+    except Exception:
+        pass

tests/integration/events/test_nats_integration.py

@@ -0,0 +1,240 @@
+import asyncio
+import json
+
+import pytest
+import pytest_asyncio
+
+from libs.events.base import EventPayload
+from libs.events.nats_bus import NATSEventBus
+from libs.schemas.events import DocumentIngestedEventData
+
+
+# Check if NATS is available
+async def is_nats_available():
+    import nats
+
+    try:
+        nc = await nats.connect("nats://localhost:4222")
+        await nc.close()
+        return True
+    except Exception:
+        return False
+
+
+@pytest_asyncio.fixture
+async def nats_bus():
+    """Create and start a NATS event bus for testing."""
+    if not await is_nats_available():
+        pytest.skip("NATS server not available at localhost:4222")
+
+    bus = NATSEventBus(
+        servers="nats://localhost:4222",
+        stream_name="TEST_INTEGRATION_STREAM",
+        consumer_group="test-integration-group",
+        dlq_stream_name="TEST_INTEGRATION_DLQ",
+        max_retries=2,
+    )
+
+    await bus.start()
+
+    # Clean up streams before test
+    try:
+        await bus.js.delete_stream("TEST_INTEGRATION_STREAM")
+        await bus.js.delete_stream("TEST_INTEGRATION_DLQ")
+    except Exception:
+        pass
+
+    # Re-create streams
+    await bus._ensure_stream_exists()
+    await bus.dlq.ensure_dlq_stream_exists()
+
+    # Allow time for streams to propagate
+    await asyncio.sleep(2)
+
+    yield bus
+
+    # Clean up after test
+    try:
+        await bus.js.delete_stream("TEST_INTEGRATION_STREAM")
+        await bus.js.delete_stream("TEST_INTEGRATION_DLQ")
+    except Exception:
+        pass
+
+    await bus.stop()
+
+
+@pytest.mark.integration
+@pytest.mark.asyncio
+async def test_publish_subscribe_flow():
+    """Test end-to-end publish and subscribe flow."""
+    # Instantiate bus directly to debug fixture issues
+    bus = NATSEventBus(
+        servers="nats://localhost:4222",
+        stream_name="TEST_INTEGRATION_STREAM_DIRECT",
+        consumer_group="test-integration-group-direct",
+        dlq_stream_name="TEST_INTEGRATION_DLQ_DIRECT",
+        max_retries=2,
+    )
+    await bus.start()
+    try:
+        await bus.js.delete_stream("TEST_INTEGRATION_STREAM_DIRECT")
+    except Exception:
+        pass
+
+    await bus._ensure_stream_exists()
+
+    try:
+        # Create event data
+        data = DocumentIngestedEventData(
+            doc_id="test-doc-123",
+            filename="test.pdf",
+            mime_type="application/pdf",
+            size_bytes=1024,
+            source="upload",
+            kind="invoice",
+            storage_path="s3://test-bucket/test.pdf",
+            checksum_sha256="a" * 64,
+        )
+
+        payload = EventPayload(
+            data=data.model_dump(mode="json"),
+            actor="test-user",
+            tenant_id="test-tenant",
+            trace_id="trace-123",
+            schema_version="1.0",
+        )
+        payload.event_id = "evt-123"
+
+        # Setup subscriber
+        received_event = asyncio.Future()
+
+        async def handler(topic, event):
+            if not received_event.done():
+                received_event.set_result(event)
+
+        await bus.subscribe("doc.ingested", handler)
+
+        # Publish event
+        success = await bus.publish("doc.ingested", payload)
+        assert success is True
+
+        # Wait for reception
+        try:
+            result = await asyncio.wait_for(received_event, timeout=5.0)
+            assert result.event_id == payload.event_id
+            assert result.data["doc_id"] == "test-doc-123"
+        except TimeoutError:
+            pytest.fail("Event not received within timeout")
+    finally:
+        await bus.stop()
+
+
+@pytest.mark.integration
+@pytest.mark.asyncio
+async def test_dlq_routing(nats_bus):
+    """Test that failed events are routed to DLQ after retries."""
+    # Create event data
+    data = DocumentIngestedEventData(
+        doc_id="test-doc-fail",
+        filename="fail.pdf",
+        mime_type="application/pdf",
+        size_bytes=1024,
+        source="upload",
+        kind="invoice",
+        storage_path="s3://test-bucket/fail.pdf",
+        checksum_sha256="a" * 64,
+    )
+
+    payload = EventPayload(
+        data=data.model_dump(mode="json"),
+        actor="test-user",
+        tenant_id="test-tenant",
+        trace_id="trace-fail",
+        schema_version="1.0",
+    )
+
+    # Setup failing handler
+    failure_count = 0
+
+    async def failing_handler(topic, event):
+        nonlocal failure_count
+        failure_count += 1
+        raise ValueError("Simulated processing failure")
+
+    await nats_bus.subscribe("doc.fail", failing_handler)
+
+    # Publish event
+    await nats_bus.publish("doc.fail", payload)
+
+    # Wait for retries and DLQ routing
+    await asyncio.sleep(2.0)  # Wait for processing
+
+    assert failure_count >= 2
+
+    # Consume from DLQ to verify
+    dlq_sub = await nats_bus.js.pull_subscribe(
+        subject="TEST_INTEGRATION_DLQ.doc.fail", durable="test-dlq-consumer"
+    )
+
+    msgs = await dlq_sub.fetch(batch=1, timeout=5.0)
+    assert len(msgs) == 1
+    dlq_msg = msgs[0]
+    dlq_data = json.loads(dlq_msg.data.decode())
+
+    assert dlq_data["original_payload"]["event_id"] == payload.event_id
+    assert dlq_data["error"]["type"] == "ValueError"
+    assert dlq_data["error"]["message"] == "Simulated processing failure"
+    await dlq_msg.ack()
+
+
+@pytest.mark.integration
+@pytest.mark.asyncio
+async def test_metrics_recording(nats_bus):
+    """Test that metrics are recorded during event processing."""
+    from libs.events.metrics import event_consumed_total, event_published_total
+
+    # Get initial values
+    initial_published = event_published_total.labels(topic="doc.metrics")._value.get()
+    initial_consumed = event_consumed_total.labels(
+        topic="doc.metrics", consumer_group="test-integration-group"
+    )._value.get()
+
+    # Create and publish event
+    data = DocumentIngestedEventData(
+        doc_id="test-doc-metrics",
+        filename="metrics.pdf",
+        mime_type="application/pdf",
+        size_bytes=1024,
+        source="upload",
+        kind="invoice",
+        storage_path="s3://test-bucket/metrics.pdf",
+        checksum_sha256="a" * 64,
+    )
+
+    payload = EventPayload(
+        data=data.model_dump(mode="json"),
+        actor="test-user",
+        tenant_id="test-tenant",
+        trace_id="trace-metrics",
+        schema_version="1.0",
+    )
+
+    received_event = asyncio.Future()
+
+    async def handler(topic, event):
+        if not received_event.done():
+            received_event.set_result(event)
+
+    await nats_bus.subscribe("doc.metrics", handler)
+    await nats_bus.publish("doc.metrics", payload)
+
+    await asyncio.wait_for(received_event, timeout=5.0)
+
+    # Check metrics increased
+    final_published = event_published_total.labels(topic="doc.metrics")._value.get()
+    final_consumed = event_consumed_total.labels(
+        topic="doc.metrics", consumer_group="test-integration-group"
+    )._value.get()
+
+    assert final_published > initial_published
+    assert final_consumed > initial_consumed