make util.extend return target object (ref: vuejs#585)

yyx990803 · yyx990803 · commit 944c79446189 · 2014-11-24T14:09:20.000-05:00
diff --git a/src/util/lang.js b/src/util/lang.js
@@ -116,6 +116,7 @@ exports.extend = function (to, from) {
   for (var key in from) {
     to[key] = from[key]
   }
+  return to
 }
 
 /**
diff --git a/test/unit/specs/util/lang_spec.js b/test/unit/specs/util/lang_spec.js
@@ -62,9 +62,10 @@ describe('Util - Language Enhancement', function () {
   it('extend', function () {
     var from = {a:1,b:2}
     var to = {}
-    _.extend(to, from)
+    var res = _.extend(to, from)
     expect(to.a).toBe(from.a)
     expect(to.b).toBe(from.b)
+    expect(res).toBe(to)
   })
 
   it('isObject', function () {

Original file line number	Diff line number	Diff line change
`@@ -116,6 +116,7 @@ exports.extend = function (to, from) {`
`116`	`116`	`for (var key in from) {`
`117`	`117`	`to[key] = from[key]`
`118`	`118`	`}`
	`119`	`+ return to`
`119`	`120`	`}`
`120`	`121`
`121`	`122`	`/**`