Polish Date formatting API.

tests/lib/i18n/date_format_test.dart

 /**
  * Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
  * for details. All rights reserved. Use of this source code is governed by a
  * BSD-style license that can be found in the LICENSE file.
  */
 
-#library('date_format_test');
+#library('date_time_format_test');
 
-#import('../../../lib/i18n/date_format.dart');
+#import('../../../lib/i18n/date_format.dart');//TODO(efortuna): rename.
 #import('../../../lib/unittest/unittest.dart');
 
 /**
  * Tests the DateFormat library in dart.
  */
 
 main() {
   test('Date formatting', () {
     var date_format = new DateFormat.fullDate();
     Date date = new Date.now();
     // TODO(efortuna): Change the expectation once we have a functioning date
     // formatting class.
     Expect.stringEquals(date.toString(), date_format.format(date));
     
-    date_format = new DateFormat("hh:mm:ss");
+    date_format = new DateFormat("Hms");
     Expect.stringEquals(date.toString(), date_format.format(date));
+
+    date_format = new DateFormat(DateFormat.Hms);

[Alan Knight, 2012/06/03 17:19:52]

This puts us back to having the extra DateFormat that Vijay wanted to avoid by
having the named constructors. Maybe we should support new DateFormat.hms()??

These tests clearly won't run because they use DateFormat and it was renamed,
but I presume that comes as part of the TODO at the top.

+    Expect.stringEquals(date.toString(), date_format.format(date));
+    
+    date_format = new DateFormat("Hms");
+    Expect.stringEquals(date.toString(), date_format.format(date));
+
+    var intl = new Intl();
+    intl.date.setFormat = intl.date.y;
+    Expect.stringEquals(date.toString(), intl.date.format(date));
+
+
+    intl.date.setFormat = 'y';
+    Expect.stringEquals(date.toString(), intl.date.format(date));
   });
 
   test('Date parsing', () {
     var date_format = new DateFormat.fullDate();
     Date date =  new Date.now();
     // TODO(efortuna): Change the expectation once we have a functioning date
     // formatting class.
     Expect.stringEquals(date_format.parse(date.toString()), date.toString());
   });
 }