Add tests for the datetransform with a timezone

addon/-private/ext/date.js

@@ -47,12 +47,12 @@ export const parseDate = function (date) {
 Ember.Date.parse = function (date) {
   // throw deprecation
   deprecate(`Ember.Date.parse is deprecated because Safari 5-, IE8-, and
-    Firefox 3.6- are no longer supported (see
-    https://github.com/csnover/js-iso8601 for the history of this issue).
-    Please use Date.parse instead`, false, {
-    id: 'ds.ember.date.parse-deprecate',
-    until: '3.0.0'
-  });
+      Firefox 3.6- are no longer supported (see
+      https://github.com/csnover/js-iso8601 for the history of this issue).
+      Please use Date.parse instead`, false, {
+        id: 'ds.ember.date.parse-deprecate',
+        until: '3.0.0'
+      });
 
   return parseDate(date);
 };
@@ -70,8 +70,8 @@ ENV = {
   }
 }
 `, false, {
-    id: 'ds.date.parse-deprecate',
-    until: '3.0.0'
-  });
+  id: 'ds.date.parse-deprecate',
+  until: '3.0.0'
+});
   Date.parse = parseDate;
 }

addon/-private/transforms/date.js

@@ -1,4 +1,3 @@
-import Ember from 'ember';
 import { parseDate } from "ember-data/-private/ext/date";
 
 /**

tests/unit/transform/date-test.js

@@ -39,6 +39,17 @@ test("#deserialize", function(assert) {
   assert.equal(transform.deserialize(undefined), null);
 });
 
+test("#deserialize with different offset formats", function(assert) {
+  var transform = new DS.DateTransform();
+  var dateString = '2003-05-24T23:00:00.000+0000';
+  var dateStringColon = '2013-03-15T23:22:00.000+00:00';
+  var dateStringShortOffset = '2016-12-02T17:30:00.000+00';
+
+  assert.equal(transform.deserialize(dateString).getTime(), 1053817200000);
+  assert.equal(transform.deserialize(dateStringShortOffset).getTime(), 1480699800000);
+  assert.equal(transform.deserialize(dateStringColon).getTime(), 1363389720000);
+});
+
 testInDebug('Ember.Date.parse has been deprecated', function(assert) {
   run(function() {
     assert.expectDeprecation(function() {