Full test coverage on Ordering, few more bugs found as well.

 define(function(require) {
     'use strict';
+    var _ = require('underscore');
     var Backbone = require('backbone');
 
     var Ordering = Backbone.Model.extend({
+        constructor: function(data, options) {
+            options = _.extend({}, options, {parse: true});
+            return Backbone.Model.call(this, data, options);
+        },
         defaults: function defaults() {
             return {
                 value: null,

@@ -7,9 +7,33 @@ define(function(require) {
         it('loads', function() {
             expect(Ordering).toBeDefined();
         });
-        it('items are different instances', function() {
-            var o1 = new Ordering(), o2 = new Ordering();
-            expect(o1.get('items')).not.toBe(o2.get('items'));
+        describe(':items', function() {
+            var items = [
+                {value: 'a', label: 'A'},
+                {value: 'b', label: 'B'},
+                {value: 'c', label: 'C'},
+            ];
+            it('default value is not shared globally', function() {
+                var o1 = new Ordering(), o2 = new Ordering();
+                expect(o1.get('items')).not.toBe(o2.get('items'));
+            });
+            it('array is converted to collection without specifying parse', function() {
+                var o = new Ordering({items: items});
+                expect(o.get('items')).not.toBe(items);
+            });
+            it('same passed value is not shared globally', function() {
+                var o1 = new Ordering({items: items}, {parse: false});
+                var o2 = new Ordering({items: items}, {parse: false});
+                expect(o1.get('items')).not.toBe(o2.get('items'));
+            });
+            it(':value is first item', function() {
+                var o = new Ordering({items: items});
+                expect(o.get('value')).toBe('a');
+            });
+            it(':value is not changed', function() {
+                var o = new Ordering({items: items, value: '1'});
+                expect(o.get('value')).toBe('1');
+            });
         });
     });
 });