userId: fix unhandled rejection from refreshUserIds

modules/userId/index.js

@@ -723,7 +723,7 @@ function getUserIdsAsEidBySource(sourceName) {
  * Sample use case is exposing this function to ESP
  */
 function getEncryptedEidsForSource(source, encrypt, customFunction) {
-  return initIdSystem().then(() => {
+  return retryOnCancel().then(() => {
     let eidsSignals = {};
 
     if (isFn(customFunction)) {
@@ -782,6 +782,23 @@ function registerSignalSources() {
   }
 }
 
+function retryOnCancel(initParams) {
+  return initIdSystem(initParams).then(
+    () => getUserIds(),
+    (e) => {
+      if (e === INIT_CANCELED) {
+        // there's a pending refresh - because GreedyPromise runs this synchronously, we are now in the middle
+        // of canceling the previous init, before the refresh logic has had a chance to run.
+        // Use a "normal" Promise to clear the stack and let it complete (or this will just recurse infinitely)
+        return Promise.resolve().then(getUserIdsAsync)
+      } else {
+        logError('Error initializing userId', e)
+        return GreedyPromise.reject(e)
+      }
+    }
+  );
+}
+
 /**
  * Force (re)initialization of ID submodules.
  *
@@ -793,12 +810,12 @@ function registerSignalSources() {
  * @param callback? called when the refresh is complete
  */
 function refreshUserIds({submoduleNames} = {}, callback) {
-  return initIdSystem({refresh: true, submoduleNames})
-    .then(() => {
+  return retryOnCancel({refresh: true, submoduleNames})
+    .then((userIds) => {
       if (callback && isFn(callback)) {
         callback();
       }
-      return getUserIds();
+      return userIds;
     });
 }
 
@@ -814,20 +831,7 @@ function refreshUserIds({submoduleNames} = {}, callback) {
  */
 
 function getUserIdsAsync() {
-  return initIdSystem().then(
-    () => getUserIds(),
-    (e) => {
-      if (e === INIT_CANCELED) {
-        // there's a pending refresh - because GreedyPromise runs this synchronously, we are now in the middle
-        // of canceling the previous init, before the refresh logic has had a chance to run.
-        // Use a "normal" Promise to clear the stack and let it complete (or this will just recurse infinitely)
-        return Promise.resolve().then(getUserIdsAsync)
-      } else {
-        logError('Error initializing userId', e)
-        return GreedyPromise.reject(e)
-      }
-    }
-  );
+  return retryOnCancel();
 }
 
 export function getConsentHash() {

test/spec/modules/userId_spec.js

@@ -1102,18 +1102,20 @@ describe('User ID', function () {
         });
       });
 
-      it('should still resolve promises returned by getUserIdsAsync', () => {
-        startInit();
-        let result = null;
-        getGlobal().getUserIdsAsync().then((val) => { result = val; });
-        return clearStack().then(() => {
-          expect(result).to.equal(null); // auction has not ended, callback should not have been called
-          mockIdCallback.callsFake((cb) => cb(MOCK_ID));
-          return getGlobal().refreshUserIds().then(clearStack);
-        }).then(() => {
-          expect(result).to.deep.equal(getGlobal().getUserIds()) // auction still not over, but refresh was explicitly forced
+      ['refreshUserIds', 'getUserIdsAsync'].forEach(method => {
+        it(`should still resolve promises returned by ${method}`, () => {
+          startInit();
+          let result = null;
+          getGlobal()[method]().then((val) => { result = val; });
+          return clearStack().then(() => {
+            expect(result).to.equal(null); // auction has not ended, callback should not have been called
+            mockIdCallback.callsFake((cb) => cb(MOCK_ID));
+            return getGlobal().refreshUserIds().then(clearStack);
+          }).then(() => {
+            expect(result).to.deep.equal(getGlobal().getUserIds()) // auction still not over, but refresh was explicitly forced
+          });
         });
-      });
+      })
 
       it('should not stop auctions', (done) => {
         // simulate an infinite `auctionDelay`; refreshing should still allow the auction to continue