From be8510356a98c2e76c041ccac4129b00a2d4fbe5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Matias=20Niemel=C3=A4?= <matias@yearofmoo.com>
Date: Thu, 23 Feb 2017 21:23:57 -0800
Subject: [PATCH] fix(animations): microtasks should not be timeouts (#14687)

---
 modules/@angular/animations/src/util.ts       |  3 +--
 modules/@angular/animations/test/util_spec.ts | 24 +++++++++++++++++++
 2 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 modules/@angular/animations/test/util_spec.ts

diff --git a/modules/@angular/animations/src/util.ts b/modules/@angular/animations/src/util.ts
index 97f38a28fa..530e64707e 100644
--- a/modules/@angular/animations/src/util.ts
+++ b/modules/@angular/animations/src/util.ts
@@ -6,6 +6,5 @@
  * found in the LICENSE file at https://angular.io/license
  */
 export function scheduleMicroTask(cb: () => any) {
-  // FIXME
-  setTimeout(cb, 0);
+  Promise.resolve(null).then(cb);
 }
diff --git a/modules/@angular/animations/test/util_spec.ts b/modules/@angular/animations/test/util_spec.ts
new file mode 100644
index 0000000000..f687d3da7b
--- /dev/null
+++ b/modules/@angular/animations/test/util_spec.ts
@@ -0,0 +1,24 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+import {scheduleMicroTask} from '../src/util';
+
+export function main() {
+  describe('util', () => {
+    it('should schedule a microtask and not call an async timeout', (done) => {
+      let count = 0;
+      scheduleMicroTask(() => count++);
+
+      expect(count).toEqual(0);
+      Promise.resolve(null).then(() => {
+        expect(count).toEqual(1);
+        done();
+      });
+      expect(count).toEqual(0);
+    });
+  });
+}