From 3f34162fd99d02d435146e3e919b4f5c5db16288 Mon Sep 17 00:00:00 2001
From: Hannah Wolfe <erisds@gmail.com>
Date: Fri, 9 Jan 2015 21:52:23 +0000
Subject: [PATCH] Fix has helper tag matching

fixes #4780
---
 core/server/helpers/has.js                |  2 +-
 core/test/unit/server_helpers/has_spec.js | 26 +++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/core/server/helpers/has.js b/core/server/helpers/has.js
index ae4296a8e4..6e8752816d 100644
--- a/core/server/helpers/has.js
+++ b/core/server/helpers/has.js
@@ -25,7 +25,7 @@ has = function (options) {
             return p || (_.findIndex(tags, function (item) {
                 // Escape regex special characters
                 item = item.replace(/[\-\/\\\^$*+?.()|\[\]{}]/g, '\\$&');
-                item = new RegExp(item, 'i');
+                item = new RegExp('^' + item + '$', 'i');
                 return item.test(c);
             }) !== -1);
         }, false);
diff --git a/core/test/unit/server_helpers/has_spec.js b/core/test/unit/server_helpers/has_spec.js
index 64a17fd9ed..86fa5a12c6 100644
--- a/core/test/unit/server_helpers/has_spec.js
+++ b/core/test/unit/server_helpers/has_spec.js
@@ -44,6 +44,32 @@ describe('{{#has}} helper', function () {
         inverse.called.should.be.false;
     });
 
+    it('should match exact tags, not superstrings', function () {
+        var fn = sinon.spy(),
+            inverse = sinon.spy();
+
+        helpers.has.call(
+            {tags: [{name: 'magical'}]},
+            {hash: {tag: 'magic'}, fn: fn, inverse: inverse}
+        );
+
+        fn.called.should.be.false;
+        inverse.called.should.be.true;
+    });
+
+    it('should match exact tags, not substrings', function () {
+        var fn = sinon.spy(),
+            inverse = sinon.spy();
+
+        helpers.has.call(
+            {tags: [{name: 'magic'}]},
+            {hash: {tag: 'magical'}, fn: fn, inverse: inverse}
+        );
+
+        fn.called.should.be.false;
+        inverse.called.should.be.true;
+    });
+
     it('should handle tag list that validates false', function () {
         var fn = sinon.spy(),
             inverse = sinon.spy();