fix(input): use UTC when parsing dates

Angular used to use the `new Date(month, date, year)` constructor to
create `Date` objects in `input[type=date]` et al, which uses the 
current timezone of the browser. However, the HTML5 spec 
defines the timezone for for `input[type=date]` to be UTC.
This commit changes the parsing to always use the 
UTC timezone.

Closes angular#8447.

Author: tbosch

src/ng/directive/input.js

@@ -1016,7 +1016,7 @@ function weekParser(isoWeek) {
             week = +parts[2],
             firstThurs = getFirstThursdayOfYear(year),
             addDays = (week - 1) * 7;
-         return new Date(year, 0, firstThurs.getDate() + addDays);
+         return new Date(Date.UTC(year, 0, firstThurs.getDate() + addDays));
       }
    }
 
@@ -1045,7 +1045,7 @@ function createDateParser(regexp, mapping) {
                }
             });
 
-            return new Date(map.yyyy, map.MM - 1, map.dd, map.HH, map.mm);
+            return new Date(Date.UTC(map.yyyy, map.MM - 1, map.dd, map.HH, map.mm));
          }
       }
 

test/ng/directive/inputSpec.js

@@ -1643,7 +1643,7 @@ describe('input', function() {
       it('should validate', function (){
         changeInputValueTo('2013-07');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(2013, 6, 1));
+        expect(+scope.value).toBe(+Date.UTC(2013, 6, 1));
         expect(scope.form.alias.$error.min).toBeFalsy();
       });
     });
@@ -1656,7 +1656,7 @@ describe('input', function() {
       it('should validate', function (){
         changeInputValueTo('2012-03');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(2012, 2, 1));
+        expect(+scope.value).toBe(+Date.UTC(2012, 2, 1));
         expect(scope.form.alias.$error.max).toBeFalsy();
       });
 
@@ -1684,7 +1684,7 @@ describe('input', function() {
       compileInput('<input type="week" ng-model="secondWeek"/>');
 
       scope.$apply(function(){
-        scope.secondWeek = new Date(2013, 0, 11);
+        scope.secondWeek = new Date(Date.UTC(2013, 0, 11));
       });
 
       expect(inputElm.val()).toBe('2013-W02');
@@ -1694,7 +1694,7 @@ describe('input', function() {
       compileInput('<input type="week" ng-model="value"/>');
 
       scope.$apply(function(){
-        scope.value = new Date(2013, 0, 11);
+        scope.value = new Date(Date.UTC(2013, 0, 11));
       });
 
 
@@ -1738,7 +1738,7 @@ describe('input', function() {
       compileInput('<input type="week" ng-model="test" />');
 
       scope.$apply(function() {
-        scope.test = new Date(2011, 0, 1);
+        scope.test = new Date(Date.UTC(2011, 0, 1));
       });
 
       changeInputValueTo('');
@@ -1761,7 +1761,7 @@ describe('input', function() {
       it('should validate', function (){
         changeInputValueTo('2013-W03');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(2013, 0, 17));
+        expect(+scope.value).toBe(+Date.UTC(2013, 0, 17));
         expect(scope.form.alias.$error.min).toBeFalsy();
       });
     });
@@ -1774,7 +1774,7 @@ describe('input', function() {
       it('should validate', function (){
         changeInputValueTo('2012-W01');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(2012, 0, 5));
+        expect(+scope.value).toBe(Date.UTC(2012, 0, 5));
         expect(scope.form.alias.$error.max).toBeFalsy();
       });
 
@@ -1878,7 +1878,7 @@ describe('input', function() {
       it('should validate', function (){
         changeInputValueTo('2000-01-01T23:02');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(2000, 0, 1, 23, 2));
+        expect(+scope.value).toBe(+Date.UTC(2000, 0, 1, 23, 2));
         expect(scope.form.alias.$error.min).toBeFalsy();
       });
     });
@@ -1898,7 +1898,7 @@ describe('input', function() {
       it('should validate', function() {
         changeInputValueTo('2000-01-01T01:02');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(2000, 0, 1, 1, 2));
+        expect(+scope.value).toBe(+Date.UTC(2000, 0, 1, 1, 2));
         expect(scope.form.alias.$error.max).toBeFalsy();
       });
     });
@@ -2023,7 +2023,7 @@ describe('input', function() {
       it('should validate', function (){
         changeInputValueTo('23:02');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(0, 0, 1, 23, 2));
+        expect(+scope.value).toBe(+Date.UTC(0, 0, 1, 23, 2));
         expect(scope.form.alias.$error.min).toBeFalsy();
       });
     });
@@ -2043,7 +2043,7 @@ describe('input', function() {
       it('should validate', function() {
         changeInputValueTo('05:30');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(0, 0, 1, 5, 30));
+        expect(+scope.value).toBe(+Date.UTC(0, 0, 1, 5, 30));
         expect(scope.form.alias.$error.max).toBeFalsy();
       });
     });
@@ -2168,7 +2168,7 @@ describe('input', function() {
       it('should validate', function (){
         changeInputValueTo('2000-01-01');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(2000, 0, 1));
+        expect(+scope.value).toBe(Date.UTC(2000, 0, 1));
         expect(scope.form.alias.$error.min).toBeFalsy();
       });
     });
@@ -2188,7 +2188,7 @@ describe('input', function() {
       it('should validate', function() {
         changeInputValueTo('2000-01-01');
         expect(inputElm).toBeValid();
-        expect(+scope.value).toBe(+new Date(2000, 0, 1));
+        expect(+scope.value).toBe(Date.UTC(2000, 0, 1));
         expect(scope.form.alias.$error.max).toBeFalsy();
       });
     });