fix(ios): network log empty response body (#1273)

Author: ahmedAlaaInstabug

CHANGELOG.md

@@ -6,6 +6,10 @@
 
 - Add support for Expo Router navigation tracking ([#1270](https://github.com/Instabug/Instabug-React-Native/pull/1270)).
 
+### Fixed
+
+- Fix APM network logging on iOS when the response body is missing or empty. ([#1273](https://github.com/Instabug/Instabug-React-Native/pull/1273)).
+
 ## [13.3.0](https://github.com/Instabug/Instabug-React-Native/compare/v13.2.0...v13.3.0) (August 4, 2024)
 
 ### Added

src/utils/XhrNetworkInterceptor.ts

@@ -152,7 +152,7 @@ export default {
               const _response = this._response;
               cloneNetwork.requestBody =
                 typeof _response === 'string' ? _response : JSON.stringify(_response);
-              cloneNetwork.responseBody = null;
+              cloneNetwork.responseBody = '';
             }
 
             if (this.response) {

test/utils/XhrNetworkInterceptor.spec.ts

@@ -236,7 +236,7 @@ describe('Network Interceptor', () => {
         expect.objectContaining({
           errorDomain: 'ClientError',
           errorCode: 0,
-          responseBody: null,
+          responseBody: '',
         }),
       );
     });