From: Rocky Meza <rockymeza@gmail.com>
Date: Tue, 29 Nov 2011 05:23:31 +0000 (-0700)
Subject: added isDST method to moment.fn
X-Git-Tag: 1.2.0~27^2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F81%2Fhead;p=thirdparty%2Fmoment.git

added isDST method to moment.fn
---

diff --git a/moment.js b/moment.js
index 9565ed16b..a64cc5ebb 100644
--- a/moment.js
+++ b/moment.js
@@ -486,6 +486,11 @@
         isLeapYear : function () {
             var year = this._d.getFullYear();
             return (year % 4 === 0 && year % 100 !== 0) || year % 400 === 0;
+        },
+
+        isDST : function() {
+            var dayOne = new Date(this._d.getFullYear(), 0, 1, 0, 0, 0);
+            return this._d.getTimezoneOffset() !== dayOne.getTimezoneOffset();
         }
     };
 
diff --git a/sitesrc/js/unit-tests.js b/sitesrc/js/unit-tests.js
index cde923216..29928bf6f 100755
--- a/sitesrc/js/unit-tests.js
+++ b/sitesrc/js/unit-tests.js
@@ -322,5 +322,13 @@ test("format timezone", 2, function() {
     ok(b.format('zz').match(/^[A-Z]{3,5}$/), b.format('zz') + ' ---> Something like "PST"');
 });
 
+test("isDST", 2, function() {
+    // In the US 2011 March 13 is Daylight Savings Day
+    var a = moment(new Date(2011, 2, 12, 0, 0, 0)),
+      b = moment(new Date(2011, 2, 14, 0, 0, 0));
+    ok(!a.isDST(), '2011 March 12 is not DST');
+    ok(b.isDST(), '2011 March 14 is DST');
+});
+
 })();