From 9d17ea9297ab6e4c697899a99ee35ae97a4a1c7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Pierzcha=C5=82a?= <thymikee@gmail.com>
Date: Mon, 26 Jun 2017 22:58:18 +0200
Subject: [PATCH] Make sure runAllTimers also clears all ticks

---
 .../jest-util/src/__tests__/fake_timers.test.js   | 15 +++++++++++++++
 packages/jest-util/src/fake_timers.js             |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/packages/jest-util/src/__tests__/fake_timers.test.js b/packages/jest-util/src/__tests__/fake_timers.test.js
index 210dfac4e556..41a8e4e5dc1f 100644
--- a/packages/jest-util/src/__tests__/fake_timers.test.js
+++ b/packages/jest-util/src/__tests__/fake_timers.test.js
@@ -406,6 +406,21 @@ describe('FakeTimers', () => {
         ),
       );
     });
+
+    it('also clears ticks', () => {
+      const global = {process};
+      const timers = new FakeTimers(global, moduleMocker);
+      timers.useFakeTimers();
+
+      const fn = jest.genMockFn();
+      global.setTimeout(() => {
+        process.nextTick(fn);
+      }, 0);
+      expect(fn.mock.calls.length).toBe(0);
+
+      timers.runAllTimers();
+      expect(fn.mock.calls.length).toBe(1);
+    });
   });
 
   describe('runTimersToTime', () => {
diff --git a/packages/jest-util/src/fake_timers.js b/packages/jest-util/src/fake_timers.js
index b0d47a59daa6..001a66455cf2 100644
--- a/packages/jest-util/src/fake_timers.js
+++ b/packages/jest-util/src/fake_timers.js
@@ -219,6 +219,10 @@ class FakeTimers {
       if (this._immediates.length) {
         this.runAllImmediates();
       }
+
+      if (this._ticks.length) {
+        this.runAllTicks();
+      }
     }
 
     if (i === this._maxLoops) {