Fix npm test

frontend/app/components/api/api-v3/hal-resources/work-package-resource.service.test.ts

@@ -144,8 +144,10 @@ describe('WorkPackageResource service', () => {
 
     const expectCacheUpdate = () => {
       it('should update the work package cache', () => {
+        result.then(() => {
           expect(updateWorkPackageStub.calledWith(workPackage)).to.be.true;
         });
+      });
     };
 
     beforeEach(() => {

frontend/app/components/api/api-v3/hal-resources/work-package-resource.service.ts

@@ -475,9 +475,12 @@ export class WorkPackageResource extends HalResource {
       resources[name] = linked ? linked.$update() : $q.reject();
     });
 
-    return $q.all(resources).then(() => {
+    const promise = $q.all(resources)
+    promise.then(() => {
       wpCacheService.updateWorkPackage(this);
     });
+
+    return promise;
   }
 
   /**