fix(parser): make identitySource nulablel in APIGatewayRequestAuthorizerEventV2Schema (#3485)

Author: am29d

Diff for: packages/parser/src/schemas/apigwv2.ts

@@ -230,7 +230,7 @@ const APIGatewayRequestAuthorizerEventV2Schema = z.object({
   version: z.literal('2.0'),
   type: z.literal('REQUEST'),
   routeArn: z.string(),
-  identitySource: APIGatewayStringArray,
+  identitySource: APIGatewayStringArray.nullish(),
   routeKey: z.string(),
   rawPath: z.string(),
   rawQueryString: z.string(),

Diff for: packages/parser/tests/unit/schema/apigwv2.test.ts

@@ -98,6 +98,21 @@ describe('API Gateway HTTP (v2) Schemas', () => {
       // Assess
       expect(parsedEvent).toEqual(event);
     });
+
+    it('should parse the authorizer event with null identitySource', () => {
+      // Prepare
+      const event = getTestEvent({
+        eventsPath,
+        filename: 'authorizer-request',
+      });
+      event.identitySource = null;
+
+      // Act
+      const parsedEvent = APIGatewayRequestAuthorizerEventV2Schema.parse(event);
+
+      // Assess
+      expect(parsedEvent).toEqual(event);
+    });
   });
 
   describe('APIGatewayRequestContextV2Schema', () => {