From 14d19562329aa2d55e5c1bb67d62d0b3f00ef196 Mon Sep 17 00:00:00 2001
From: harttle <yangjvn@126.com>
Date: Sat, 21 Jul 2018 23:23:25 +0800
Subject: [PATCH] test case for _.forOwn

---
 test/util/underscore.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test/util/underscore.js b/test/util/underscore.js
index 93370b20d..4375ebe5a 100644
--- a/test/util/underscore.js
+++ b/test/util/underscore.js
@@ -43,6 +43,11 @@ describe('util/underscore', function () {
       _.forOwn(obj, spy)
       expect(spy).to.have.been.calledWith('bar', 'foo', obj)
     })
+    it('should default to empty object', function () {
+      var spy = sinon.spy()
+      _.forOwn(undefined, spy)
+      expect(spy).to.have.not.been.called
+    })
     it('should not iterate over properties on prototype', function () {
       var spy = sinon.spy()
       var obj = Object.create({