fix(timezone): correct timezone date filter for 1/2 hour offsets

Author: Sujeet Pillai

src/ng/filter/filters.js

@@ -214,7 +214,8 @@ function timeZoneGetter(date) {
   var zone = -1 * date.getTimezoneOffset();
   var paddedZone = (zone >= 0) ? "+" : "";
 
-  paddedZone += padNumber(zone / 60, 2) + padNumber(Math.abs(zone % 60), 2);
+  paddedZone += padNumber(Math[zone > 0 ? 'floor' : 'ceil'](zone / 60), 2) +
+                padNumber(Math.abs(zone % 60), 2);
 
   return paddedZone;
 }

test/ng/filter/filtersSpec.js

@@ -236,6 +236,8 @@ describe('filters', function() {
       var utc       = new angular.mock.TzDate( 0, '2010-09-03T12:05:08.000Z');
       var eastOfUTC = new angular.mock.TzDate(-5, '2010-09-03T12:05:08.000Z');
       var westOfUTC = new angular.mock.TzDate(+5, '2010-09-03T12:05:08.000Z');
+      var eastOfUTCPartial = new angular.mock.TzDate(-5.5, '2010-09-03T12:05:08.000Z');
+      var westOfUTCPartial = new angular.mock.TzDate(+5.5, '2010-09-03T12:05:08.000Z');
 
       expect(date(utc, "yyyy-MM-ddTHH:mm:ssZ")).
                     toEqual('2010-09-03T12:05:08+0000')
@@ -245,6 +247,12 @@ describe('filters', function() {
 
       expect(date(westOfUTC, "yyyy-MM-ddTHH:mm:ssZ")).
                     toEqual('2010-09-03T07:05:08-0500')
+
+      expect(date(eastOfUTCPartial, "yyyy-MM-ddTHH:mm:ssZ")).
+                    toEqual('2010-09-03T17:35:08+0530')
+
+      expect(date(westOfUTCPartial, "yyyy-MM-ddTHH:mm:ssZ")).
+                    toEqual('2010-09-03T06:35:08-0530')
     });
 
     it('should treat single quoted strings as string literals', function() {