fixing enableExpressErrorHandler logic (#6423)

* fixing enableExpressErrorHandler logic

* Fix tests

Co-authored-by: n.andryukhin <n.andryukhin@mediasoft.team>
Co-authored-by: Diamond Lewis <findlewis@gmail.com>

spec/EnableExpressErrorHandler.spec.js

@@ -9,8 +9,6 @@ describe('Enable express error handler', () => {
     const masterKey = 'anOtherTestMasterKey';
     let server;
 
-    let lastError;
-
     const parseServer = ParseServer.ParseServer(
       Object.assign({}, defaultConfiguration, {
         appId: appId,
@@ -25,8 +23,8 @@ describe('Enable express error handler', () => {
           server = app.listen(12667);
 
           app.use(function(err, req, res, next) {
-            next;
-            lastError = err;
+            expect(err.message).toBe('Object not found.');
+            next(err);
           });
 
           request({
@@ -43,15 +41,8 @@ describe('Enable express error handler', () => {
               fail('Should throw error');
             })
             .catch(response => {
-              const reqError = response.data;
-              expect(reqError).toBeDefined();
-              expect(lastError).toBeDefined();
-
-              expect(lastError.code).toEqual(101);
-              expect(lastError.message).toEqual('Object not found.');
-
-              expect(lastError.code).toEqual(reqError.code);
-              expect(lastError.message).toEqual(reqError.error);
+              expect(response).toBeDefined();
+              expect(response.status).toEqual(500);
             })
             .then(() => {
               server.close(done);

src/middlewares.js

@@ -325,6 +325,9 @@ export function allowMethodOverride(req, res, next) {
 export function handleParseErrors(err, req, res, next) {
   const log = (req.config && req.config.loggerController) || defaultLogger;
   if (err instanceof Parse.Error) {
+    if (req.config && req.config.enableExpressErrorHandler) {
+      return next(err);
+    }
     let httpStatus;
     // TODO: fill out this mapping
     switch (err.code) {
@@ -337,13 +340,9 @@ export function handleParseErrors(err, req, res, next) {
       default:
         httpStatus = 400;
     }
-
     res.status(httpStatus);
     res.json({ code: err.code, error: err.message });
     log.error('Parse error: ', err);
-    if (req.config && req.config.enableExpressErrorHandler) {
-      next(err);
-    }
   } else if (err.status && err.message) {
     res.status(err.status);
     res.json({ error: err.message });