From c5cfe2b3936f3175a97c7ac3f4b5f47632f197f4 Mon Sep 17 00:00:00 2001
From: Misko Hevery
Date: Tue, 19 Oct 2010 20:38:49 -0700
Subject: fix date filter to igrone falsy input

---
 src/filters.js      | 2 +-
 test/FiltersSpec.js | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/filters.js b/src/filters.js
index 7e0f2b42..5b734882 100644
--- a/src/filters.js
+++ b/src/filters.js
@@ -75,7 +75,7 @@ var DATE_FORMATS = {
 var DATE_FORMATS_SPLIT = /([^yMdHhmsaZ]*)(y+|M+|d+|H+|h+|m+|s+|a|Z)(.*)/;
 
 angularFilter.date = function(date, format) {
-  if (!date instanceof Date) return date;
+  if (!(date instanceof Date)) return date;
   var text = date.toLocaleDateString(), fn;
   if (format && isString(format)) {
     text = '';
diff --git a/test/FiltersSpec.js b/test/FiltersSpec.js
index 3e5ca9a6..fbaceac6 100644
--- a/test/FiltersSpec.js
+++ b/test/FiltersSpec.js
@@ -100,6 +100,12 @@ describe('filter', function(){
         midnight.getTimezoneOffset =
           function() { return 7 * 60; };
 
+    it('should ignore falsy inputs', function() {
+      expect(filter.date(null)).toEqual(null);
+      expect(filter.date('')).toEqual('');
+      expect(filter.date(123)).toEqual(123);
+    });
+
     it('should do basic filter', function() {
       expect(filter.date(noon)).toEqual(noon.toLocaleDateString());
       expect(filter.date(noon, '')).toEqual(noon.toLocaleDateString());
-- 
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