From 21950295acf3c7c7438168f3eff750ddbacf2bf9 Mon Sep 17 00:00:00 2001
From: harttle <yangjvn@126.com>
Date: Sun, 6 Nov 2016 15:26:39 +0800
Subject: [PATCH] unit test for _.echo

---
 test/util/underscore.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/test/util/underscore.js b/test/util/underscore.js
index da673c62b..91e0a112f 100644
--- a/test/util/underscore.js
+++ b/test/util/underscore.js
@@ -53,4 +53,14 @@ describe('util/underscore', function() {
             expect(_.isArray("foo")).to.be.false;
         });
     });
+    describe('.echo()', function(){
+        it('should be transparent when called', function() {
+            expect(_.echo('foo')('bar')).to.equal('bar');
+        });
+        it('should log the arguments', function() {
+            var log = sinon.spy(console, 'log');
+            _.echo('foo')('bar');
+            expect(log).to.have.been.calledWith('[foo]', 'bar');
+        });
+    });
 });