From 261e5ebbd4ea63574a381ffefd6f7d14c4b77157 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Torkel=20=C3=96degaard?= <torkel.odegaard@gmail.com>
Date: Fri, 19 Jun 2015 11:51:46 -0400
Subject: [PATCH] Fixed bug in singlestat panel and null value handling, #2189

---
 public/app/components/kbn.js          | 1 +
 public/test/specs/kbn-format-specs.js | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/public/app/components/kbn.js b/public/app/components/kbn.js
index c9d2900f53b..aa5146c1538 100644
--- a/public/app/components/kbn.js
+++ b/public/app/components/kbn.js
@@ -406,6 +406,7 @@ function($, _, moment) {
   kbn.valueFormats.velocityknot = function(value, decimals) { return kbn.toFixed(value, decimals) + ' kn'; };
 
   kbn.roundValue = function (num, decimals) {
+    if (num === null) { return null; }
     var n = Math.pow(10, decimals);
     return Math.round((n * num).toFixed(decimals))  / n;
   };
diff --git a/public/test/specs/kbn-format-specs.js b/public/test/specs/kbn-format-specs.js
index d8a11c5a43c..1a5f60975c0 100644
--- a/public/test/specs/kbn-format-specs.js
+++ b/public/test/specs/kbn-format-specs.js
@@ -51,7 +51,12 @@ define([
     });
   });
 
-
+  describe('kbn roundValue', function() {
+    it('should should handle null value', function() {
+      var str = kbn.roundValue(null, 2);
+      expect(str).to.be(null);
+    });
+  });
 
   describe('calculateInterval', function() {
     it('1h 100 resultion', function() {