fix: make headers an object instead of an array (#386)

* fix: make headers an object instead of an array

* fix: add unit test

Co-authored-by: Christian Hoffmann <352753+hffmnn@users.noreply.github.co>

__tests__/unit.api-gateway-v2.js

@@ -0,0 +1,21 @@
+const eventSources = require('../src/event-sources')
+const testUtils = require('../src/event-sources/utils.test')
+
+const apiGatewayEventSource = eventSources.getEventSource({
+  eventSourceName: 'AWS_API_GATEWAY_V2'
+})
+
+test('request has correct headers', () => {
+  const req = getReq()
+  // see https://github.com/vendia/serverless-express/issues/387
+  expect(typeof req).toEqual('object')
+  expect(JSON.stringify(req.headers)).toEqual(
+    '{"cookie":"","host":"localhost:9000","user-agent":"curl/7.64.1","accept":"*/*","x-forwarded-proto":"http","x-forwarded-port":"9000"}'
+  )
+})
+
+function getReq () {
+  const event = testUtils.sam_httpapi_event
+  const request = apiGatewayEventSource.getRequest({ event })
+  return request
+}

src/event-sources/aws/api-gateway-v2.js

@@ -18,7 +18,7 @@ function getRequestValuesFromApiGatewayEvent ({ event }) {
     search: rawQueryString
   })
 
-  const headers = []
+  const headers = {}
 
   if (cookies) {
     headers.cookie = cookies.join('; ')

src/event-sources/utils.test.ts

@@ -50,3 +50,7 @@ describe("getEventSourceNameBasedOnEvent", () => {
     expect(result).toEqual("AWS_API_GATEWAY_V2");
   });
 });
+
+module.exports = {
+  sam_httpapi_event,
+};