fix(DateObject): localDateValue() returns the wrong value for some da…

…ys if there is a daylight savin

Now it uses the timezoneOffset of the specific day to calculate the localDateValue

Closes #345

src/js/datetimepicker.js

@@ -420,7 +420,7 @@
     }
 
     function DateObject () {
-      var tempDate = new Date()
+      var tempDate = new Date(arguments[0].utcDateValue)
       var localOffset = tempDate.getTimezoneOffset() * 60000
 
       this.utcDateValue = tempDate.getTime()

test/configuration/beforeRender.spec.js

@@ -14,6 +14,7 @@ describe('beforeRender', function () {
   var $compile
   beforeEach(module('ui.bootstrap.datetimepicker'))
   beforeEach(inject(function (_$compile_, _$rootScope_) {
+    moment.tz.guess()
     moment.locale('en')
     $compile = _$compile_
     $rootScope = _$rootScope_
@@ -72,14 +73,16 @@ describe('beforeRender', function () {
     it('in day view $dates parameter contains 42 members', function () {
       $rootScope.date = moment('2014-01-01T00:00:00.000').toDate()
 
-      var offset = new Date().getTimezoneOffset() * 60000
+      var offsetDate = new Date()
 
       $rootScope.beforeRender = function (dates) {
         expect(dates.length).toBe(42)
         expect(dates[0].utcDateValue).toBe(1388275200000)
-        expect(dates[0].localDateValue()).toBe(1388275200000 + offset)
+        offsetDate.setTime(dates[0].utcDateValue)
+        expect(dates[0].localDateValue()).toBe(1388275200000 + (offsetDate.getTimezoneOffset() * 60000))
         expect(dates[11].utcDateValue).toBe(1389225600000)
-        expect(dates[11].localDateValue()).toBe(1389225600000 + offset)
+        offsetDate.setTime(dates[11].utcDateValue)
+        expect(dates[11].localDateValue()).toBe(1389225600000 + (offsetDate.getTimezoneOffset() * 60000))
       }
 
       spyOn($rootScope, 'beforeRender').and.callThrough()