Mulitselect: Push only new items to options on scope

Fixes EvanOxfeld#4.

Author: Evan Oxfeld

angular-selectize.js

@@ -103,7 +103,9 @@
 
                 if (model.indexOf(value) === -1) {
                   model.push(value);
-                  scope.$parent[optionsProperty].push(value);
+                  if (!option) {
+                    scope.$parent[optionsProperty].push(value);
+                  }
                   scope.$evalAsync(function() {
                     ngModelCtrl.$setViewValue(model);
                   });

test/multiselect.spec.js

@@ -87,6 +87,22 @@ describe('<select multiple selectize>', function() {
             mousedownClickMouseup(selectize.$dropdown_content.find('[data-value="' + 2 + '"]'));
             assert.deepEqual(scope.selection, ['foo', 'baz']);
           });
+
+	  it('should have the correct remaining options', function() {
+            assert.strictEqual(selectize.$dropdown_content.children().length, scope.options.length - scope.selection.length);
+            selectize.open();
+            mousedownClickMouseup(selectize.$dropdown_content.find('[data-value="' + 2 + '"]'));
+            timeout.flush();
+            assert.strictEqual(selectize.$dropdown_content.children().length, scope.options.length - scope.selection.length);
+	  });
+
+          it('should not change the options on scope', function() {
+            var options = angular.copy(scope.options);
+            selectize.open();
+            mousedownClickMouseup(selectize.$dropdown_content.find('[data-value="' + 2 + '"]'));
+            timeout.flush();
+            assert.deepEqual(scope.options, options);
+          });
         });
 
         describe('when a new option is added', function() {
@@ -213,6 +229,22 @@ describe('<select multiple selectize>', function() {
             mousedownClickMouseup(selectize.$dropdown_content.find('[data-value="' + 2 + '"]'));
             assert.deepEqual(scope.selection, ['guid1', 'guid3']);
           });
+
+	  it('should have the correct remaining options', function() {
+            assert.strictEqual(selectize.$dropdown_content.children().length, scope.options.length - scope.selection.length);
+            selectize.open();
+            mousedownClickMouseup(selectize.$dropdown_content.find('[data-value="' + 2 + '"]'));
+            timeout.flush();
+            assert.strictEqual(selectize.$dropdown_content.children().length, scope.options.length - scope.selection.length);
+	  });
+
+          it('should not change the options on scope', function() {
+            var options = angular.copy(scope.options);
+            selectize.open();
+            mousedownClickMouseup(selectize.$dropdown_content.find('[data-value="' + 2 + '"]'));
+            timeout.flush();
+            assert.deepEqual(scope.options, options);
+          });
         });
 
         describe('when a new option is added', function() {