chore: fixup aws sam lambda paths

Makefile

@@ -117,7 +117,7 @@ deps:
 	poetry install
 
 integration:
-	sam local invoke ProductEventHandler --event  ./__tests__/events/update.json
+	sam local invoke ProductEventHandler --event  ./tests/resources/events/update.json
 
 venv:
 	@if [ -d "./.venv" ]; then echo "$(red).venv already exists, not continuing!$(sgr0)"; exit 1; fi

src/_lambda/product.py

@@ -1,5 +1,6 @@
 import logging
 import json
+import asyncio
 from typing import Dict
 from src.product.product_service import receive_product_update
 logger = logging.getLogger(__name__)
@@ -8,7 +9,7 @@
 # Actual lambda handler, responsible for extracting message from SNS
 # and dealing with lambda-related things, passing the encoded message along to the
 # message handler
-async def handler(event: Dict):
+async def handler(event: Dict, context):
     logger.info(f'{event=}')
 
     # Read the SNS message and pass the contents to the actual message handler
@@ -19,3 +20,10 @@ async def handler(event: Dict):
 
     # Return the current size of the repository
     return len(results.keys())
+
+def lambda_handler(event, context):
+    loop = asyncio.get_event_loop()
+    # DynamoDB resource defined above is attached to this loop:
+    #   if you use asyncio.run instead
+    #   you will encounter "Event loop closed" exception
+    return loop.run_until_complete(handler(event, context))

template.yml

@@ -27,7 +27,7 @@ Resources:
     Properties:
       Description: A Lambda function that receives a Product update event from the ProductEvent topic
       Runtime: python3.11
-      Handler: src.lambda.product.handler
+      Handler: src._lambda.product.lambda_handler
       # This property associates this Lambda function with the SNS topic defined above, so that whenever the topic
       # receives a message, the Lambda function is invoked
       Events:

tests/integration/test_lambda.py

@@ -20,7 +20,7 @@ async def test_lambda_consumes_a_valid_sns_event(mocker):
         payload = json.load(f)
 
     # (2) Act: call the actual lambda with a valid SNS message
-    result = await product.handler(payload)
+    result = await product.handler(payload, {})
 
     # (3) Assert: should return
     assert result == num_products + 1