Adjust request options.headers (#1348)

* add change to httpURLConnectionClient

* changes to untittest

* headers adjusted, unittest with headers

Author: DjoykeAbyah

src/__tests__/httpClient.spec.ts

@@ -1,8 +1,11 @@
 import nock, { Interceptor } from "nock";
 import Client from "../client";
+import { createClient } from "../__mocks__/base";
 import { BinLookupAPI } from "../services";
 import ApiException from "../services/exception/apiException";
 import HttpClientException from "../httpClient/httpClientException";
+import { binlookup } from "../typings";
+import { ApiConstants } from "../constants/apiConstants";
 
 beforeEach((): void => {
     nock.cleanAll();
@@ -60,4 +63,41 @@ describe("HTTP Client", function (): void {
             return { errorType, errorMessageContains: contains, errorMessageEquals: equals };
         });
     });
-});
+
+    test("should succeed on get 3ds availability", async function (): Promise<void> {
+
+        const threeDSAvailabilitySuccessResponse = {
+            binDetails: {
+                issuerCountry: "NL"
+            },
+            threeDS1Supported: true,
+            threeDS2CardRangeDetails: [],
+            threeDS2supported: false
+        };
+
+        const client = createClient();
+        const binLookupService = new BinLookupAPI(client);
+        const scope = nock("https://pal-test.adyen.com/pal/servlet/BinLookup/v54", {
+            reqheaders: {
+                'Content-Type' : ApiConstants.APPLICATION_JSON_TYPE,
+                "foo" : "bar"
+             },
+        })
+            .get('/')
+            .reply(200)
+
+        const threeDSAvailabilityRequest: binlookup.ThreeDSAvailabilityRequest = {
+            merchantAccount: process.env.ADYEN_MERCHANT!,
+            brands: ["randomBrand"],
+            cardNumber: "4111111111111111"
+        };
+
+        scope.post("/get3dsAvailability")
+            .reply(200, threeDSAvailabilitySuccessResponse);
+
+        const requestOptions = { headers: { foo : "bar" }}
+        const response = await binLookupService.get3dsAvailability(threeDSAvailabilityRequest, requestOptions);
+        expect(response).toEqual< binlookup.ThreeDSAvailabilityResponse>(threeDSAvailabilitySuccessResponse);
+    });
+
+});

src/httpClient/httpURLConnectionClient.ts

@@ -43,7 +43,7 @@ class HttpURLConnectionClient implements ClientInterface {
         endpoint: string, json: string, config: Config, isApiRequired: boolean,
         requestOptions: IRequest.Options,
     ): Promise<string | HttpClientException | ApiException> {
-        requestOptions.headers = {};
+        requestOptions.headers ??= {};
         requestOptions.timeout = config.connectionTimeoutMillis;
 
         if (config.certificatePath) {