Fixed week formatter in date filter to comply with ISO8601 (Weeks are from

Monday to Sunday).
Also updated the test case accordingly.

Author: yannickadam

src/ng/filter/filters.js

@@ -273,7 +273,8 @@ function getFirstThursdayOfYear(year) {
 function getThursdayThisWeek(datetime) {
     return new Date(datetime.getFullYear(), datetime.getMonth(),
       // 4 = index of Thursday
-      datetime.getDate() + (4 - datetime.getDay()));
+      //ISO8601 mandates that a week starts on Monday. Making Sunday 7 instead of 0.
+      datetime.getDate() + 4 - (datetime.getDay() || 7));
 }
 
 function weekGetter(size) {

test/ng/filter/filtersSpec.js

@@ -235,8 +235,9 @@ describe('filters', function() {
     var noon =     new angular.mock.TzDate(+5, '2010-09-03T17:05:08.012Z'); //12pm
     var midnight = new angular.mock.TzDate(+5, '2010-09-03T05:05:08.123Z'); //12am
     var earlyDate = new angular.mock.TzDate(+5, '0001-09-03T05:05:08.000Z');
-    var secondWeek = new angular.mock.TzDate(+5, '2013-01-11T12:00:00.000Z'); //Friday Jan 11, 2012
-    var date;
+    var secondWeek = new angular.mock.TzDate(+5, '2013-01-13T12:00:00.000Z'); //Sunday Jan 13, 2013
+
+      var date;
 
     beforeEach(inject(function($filter) {
       date = $filter('date');