fix(core): update

test/test.ts

@@ -36,14 +36,21 @@ tap.test('should select something', async () => {
     });
 });
 
-tap.test('should dispatch a state action', async () => {
+tap.test('should dispatch a state action', async (tools) => {
+  const done = tools.defer();
   const addFavourite = testStatePart.createAction<string>(async (statePart, payload) => {
     const currentState = statePart.getState();
     currentState.currentFavorites.push(payload);
     return currentState;
   });
+  testStatePart.waitUntilPresent(state => {
+    return state.currentFavorites[0];
+  }).then(() => {
+    done.resolve();
+  });
   await testStatePart.dispatchAction(addFavourite, 'my favourite things');
   expect(testStatePart.getState().currentFavorites).to.include('my favourite things');
+  await done.promise;
 });
 
 tap.start();

ts/smartstate.classes.statepart.ts

@@ -83,12 +83,13 @@ export class StatePart<TStatePartName, TStatePayload> {
   public async waitUntilPresent<T = TStatePayload>(selectorFn?: (state: TStatePayload) => T): Promise<T> {
     const done = plugins.smartpromise.defer<T>();
     const selectedObservable = this.select(selectorFn);
-    const subscription = selectedObservable.subscribe(value => {
+    const subscription = selectedObservable.subscribe(async value => {
       if (value) {
-        subscription.unsubscribe();
         done.resolve(value);
       }
     });
-    return await done.promise;
+    const result = await done.promise;
+    subscription.unsubscribe();
+    return result;
   }
 }