RealTimeData: fix bug with missing first party data (prebid#14245)

* RealTimeData: fix bug with missing first party data

* Fix test

Author: dgirardi

libraries/objectGuard/objectGuard.js

@@ -179,7 +179,7 @@ export function objectGuard(rules) {
           // apply all (possibly nested) write protect rules
           const curValue = Reflect.get(target, prop, receiver);
           newValue = cleanup(tree.children[prop], curValue, newValue, applies);
-          if (!isData(newValue) && !target.hasOwnProperty(prop)) {
+          if (typeof newValue === 'undefined' && !target.hasOwnProperty(prop)) {
             return true;
           }
         }

test/spec/activities/objectGuard_spec.js

@@ -1,5 +1,6 @@
 import {objectGuard, writeProtectRule} from '../../../libraries/objectGuard/objectGuard.js';
 import {redactRule} from '../../../src/activities/redactor.js';
+import {mergeDeep} from 'src/utils.js';
 
 describe('objectGuard', () => {
   describe('read rule', () => {
@@ -109,6 +110,14 @@ describe('objectGuard', () => {
       });
     });
 
+    it('should work  with mergeDeep', () => {
+      applies = false;
+      const obj = {};
+      const guard = objectGuard([rule])(obj);
+      mergeDeep(guard, {foo: {nested: 'item'}});
+      expect(obj.foo).to.eql({nested: 'item'});
+    });
+
     it('should reject conflicting rules', () => {
       const crule = {...rule, paths: ['outer']};
       expect(() => objectGuard([rule, crule])).to.throw();

test/spec/modules/realTimeDataModule_spec.js

@@ -183,7 +183,7 @@ describe('Real time module', function () {
       });
       rtdModule.setBidRequestsData(() => {
         expect(request.ortb2Fragments.global.user.eids).to.eql(['id']);
-        expect(request.ortb2Fragments.bidder.bidderB?.user).to.not.exist;
+        expect(request.ortb2Fragments.bidder.bidderB?.user?.yob).to.not.exist;
         done();
       }, request);
     });