From 762e9196b169ecda150ebee58b18b6b37c408093 Mon Sep 17 00:00:00 2001
From: svozza <svozza@amazon.com>
Date: Mon, 19 Jan 2026 12:29:53 +0000
Subject: [PATCH 1/2] chore(ci): update layer script to include event-handler

---
 layers/src/layer-publisher-stack.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/layers/src/layer-publisher-stack.ts b/layers/src/layer-publisher-stack.ts
index c61fea4882..024dc81b96 100644
--- a/layers/src/layer-publisher-stack.ts
+++ b/layers/src/layer-publisher-stack.ts
@@ -66,6 +66,7 @@ export class LayerPublisherStack extends Stack {
               // the name is the same as the npm workspace name
               const utilities = [
                 'commons',
+                'event-handler',
                 'jmespath',
                 'logger',
                 'metrics',

From 8df66ad2cba52ac4ae01abce16c7923131c34df5 Mon Sep 17 00:00:00 2001
From: Andrea Amorosi <dreamorosi@gmail.com>
Date: Wed, 28 Jan 2026 12:38:30 +0100
Subject: [PATCH 2/2] tests: add evt handler to tests

---
 .../layerPublisher.class.test.functionCode.ts | 21 +++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/layers/tests/e2e/layerPublisher.class.test.functionCode.ts b/layers/tests/e2e/layerPublisher.class.test.functionCode.ts
index ed6b0f2d8e..8b68e56a75 100644
--- a/layers/tests/e2e/layerPublisher.class.test.functionCode.ts
+++ b/layers/tests/e2e/layerPublisher.class.test.functionCode.ts
@@ -1,6 +1,7 @@
 import { readFile } from 'node:fs/promises';
 import { join } from 'node:path';
 import { BatchProcessor, EventType } from '@aws-lambda-powertools/batch';
+import { Router } from '@aws-lambda-powertools/event-handler/http';
 import { DynamoDBPersistenceLayer } from '@aws-lambda-powertools/idempotency/dynamodb';
 import { Logger } from '@aws-lambda-powertools/logger';
 import { Metrics } from '@aws-lambda-powertools/metrics';
@@ -13,6 +14,7 @@ import { AppConfigDataClient } from '@aws-sdk/client-appconfigdata';
 import { DynamoDBClient } from '@aws-sdk/client-dynamodb';
 import { SecretsManagerClient } from '@aws-sdk/client-secrets-manager';
 import { SSMClient } from '@aws-sdk/client-ssm';
+import type { Context } from 'aws-lambda';
 
 const logger = new Logger({
   logLevel: 'DEBUG',
@@ -45,9 +47,12 @@ new AppConfigProvider({ environment: 'foo', awsSdkV3Client: appconfigClient });
 
 new DynamoDBProvider({ tableName: 'foo', awsSdkV3Client: ddbClient });
 
-// Instantiating the BatchProcessor will confirm that the utility can be used
 new BatchProcessor(EventType.SQS);
 
+const app = new Router({
+  logger: { error: () => {}, debug: () => {}, info: () => {}, warn: () => {} },
+});
+
 const layerPath = process.env.LAYERS_PATH || '/opt/nodejs/node_modules';
 const expectedVersion = process.env.POWERTOOLS_PACKAGE_VERSION || '0.0.0';
 
@@ -79,7 +84,7 @@ const getVersionFromModule = async (moduleName: string): Promise<string> => {
   return moduleVersion;
 };
 
-export const handler = async (_event: unknown): Promise<void> => {
+export const handler = async (_event: unknown, context: Context) => {
   // Check that the packages version matches the expected one
   for (const moduleName of [
     'commons',
@@ -90,6 +95,7 @@ export const handler = async (_event: unknown): Promise<void> => {
     'idempotency',
     'batch',
     'parser',
+    'event-handler',
   ]) {
     const moduleVersion = await getVersionFromModule(moduleName);
     if (moduleVersion !== expectedVersion) {
@@ -116,4 +122,15 @@ export const handler = async (_event: unknown): Promise<void> => {
   // the presence of a log will indicate that the logger is working
   // while the content of the log will indicate that the tracer is working
   logger.debug('subsegment', { subsegment: subsegment.format() });
+
+  // Since we're passing an invalid event, the event handler will throw
+  // an InvalidEventError. This will prove that the event-handler layer
+  // is working as expected without us having to resolve a full event
+  try {
+    await app.resolve({}, context);
+  } catch (error) {
+    if ((error as Error).name !== 'InvalidEventError') {
+      throw error;
+    }
+  }
 };