Merge pull request #22545 from tansongyang/rsvp-tostringtag

rsvp: Add [Symbol.toStringTag]

types/rsvp/index.d.ts

@@ -122,6 +122,8 @@ declare module 'rsvp' {
 
             finally<U>(onFinally?: U | PromiseLike<U>): RSVP.Promise<T>;
 
+            readonly [Symbol.toStringTag]: "Promise";
+
             static all<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10>(
                 values: [
                     Arg<T1>,

types/rsvp/rsvp-tests.ts

@@ -324,3 +324,7 @@ function testOnAndOff() {
         );
     });
 }
+
+function testAssignableToPromise() {
+    const promise: Promise<number> = RSVP.resolve(0);
+}