notifications are not propagated to parents fixed

lib/rsvp/promise.js

@@ -203,6 +203,11 @@ function handleThenable(promise, value) {
       then = value.then;
 
       if (isFunction(then)) {
+        if (isFunction(value.on)) {
+          value.on('promise:notified', function (event) {
+            notify(promise, event.detail);
+          });
+        }
         promise.on('promise:cancelled', function(event) {
           if (isFunction(value.cancel)) {
             value.cancel();

test/tests/extension_test.js

@@ -236,6 +236,31 @@ describe("RSVP extensions", function() {
       });
     });
 
+    it('notify should propagate to parent `then`', function (done) {
+      var i = 0, responses = [];
+
+      new RSVP.Promise(function (resolve) {
+        resolve();
+      }).then(function () {
+        return new RSVP.Promise(function (resolve, reject, notify) {
+          notify(1);
+          notify(2);
+          resolve(3);
+        });
+      }).then(function (answer) {
+        responses.push(answer);
+      }, null, function (notification) {
+        responses.push(notification);
+      });
+
+      setTimeout(function () {
+        assert(responses[0] === 1, "Notified once");
+        assert(responses[1] === 2, "Notified twice");
+        assert(responses[2] === 3, "Fulfilled after notifications");
+        done();
+      }, 50);
+    });
+
     describe('assimilation', function() {
       it('should assimilate if `resolve` is called with a fulfilled promise', function(done) {
         var originalPromise = new RSVP.Promise(function(resolve) { resolve('original value'); });