feat(zone.js): implement Promise.withResolvers() (#53514)

JiaLiPassion · alxhub · commit 7a28f5071153 · 2023-12-12T09:04:44.000-08:00
Implement `Promise.withResolvers()` ``` const {promise, resolve, reject} = Promise.withResolvers(); ``` PR Close #53514
diff --git a/packages/zone.js/lib/common/promise.ts b/packages/zone.js/lib/common/promise.ts
@@ -302,6 +302,19 @@ Zone.__load_patch('ZoneAwarePromise', (global: any, Zone: ZoneType, api: _ZonePr
       return resolvePromise(<ZoneAwarePromise<U>>new this(null as any), REJECTED, error);
     }
 
+    static withResolvers<T>(): {
+      promise: Promise<T>,
+      resolve: (value?: T|PromiseLike<T>) => void,
+      reject: (error?: any) => void
+    } {
+      const result: any = {};
+      result.promise = new ZoneAwarePromise((res, rej) => {
+        result.resolve = res;
+        result.reject = rej;
+      });
+      return result;
+    }
+
     static any<T>(values: Iterable<PromiseLike<T>>): Promise<T> {
       if (!values || typeof values[Symbol.iterator] !== 'function') {
         return Promise.reject(new AggregateError([], 'All promises were rejected'));
diff --git a/packages/zone.js/test/common/Promise.spec.ts b/packages/zone.js/test/common/Promise.spec.ts
@@ -911,4 +911,24 @@ describe(
           });
         });
       });
+
+      describe('Promise.withResolvers', () => {
+        it('should resolve', (done: DoneFn) => {
+          const {promise, resolve, reject} = (Promise as any).withResolvers();
+          promise.then((v: any) => {
+            expect(v).toBe(1);
+            done();
+          });
+          resolve(1);
+        });
+        it('should reject', (done: DoneFn) => {
+          const {promise, resolve, reject} = (Promise as any).withResolvers();
+          const error = new Error('test');
+          promise.catch((e: any) => {
+            expect(e).toBe(error);
+            done();
+          });
+          reject(error);
+        });
+      });
     }));
