removing some underscore model methods, adding others

backbone.js

@@ -556,11 +556,10 @@
   });
 
   // Underscore methods that we want to implement on the Model.
-  var methods =  ['each', 'forEach', 'sortBy', 'groupBy', 'size', 'keys',
-    'values', 'invert', 'pick', 'omit', 'isEqual', 'isEmpty', 'chain'];
+  var modelMethods =  ['keys', 'values', 'pairs', 'invert', 'pick', 'omit'];
 
   // Mix in each Underscore method as a proxy to `Model#attributes`.
-  _.each(methods, function(method) {
+  _.each(modelMethods, function(method) {
     Model.prototype[method] = function() {
       var args = slice.call(arguments);
       args.unshift(this.attributes);

test/model.js

@@ -111,28 +111,14 @@ $(document).ready(function() {
     equal(model.url(), '/nested/1/collection/2');
   });
 
-  test("underscore methods", 15, function() {
+  test("underscore methods", 5, function() {
     var model = new Backbone.Model({ 'foo': 'a', 'bar': 'b', 'baz': 'c' });
     var model2 = model.clone();
     deepEqual(model.keys(), ['foo', 'bar', 'baz']);
     deepEqual(model.values(), ['a', 'b', 'c']);
     deepEqual(model.invert(), { 'a': 'foo', 'b': 'bar', 'c': 'baz' });
     deepEqual(model.pick('foo', 'baz'), {'foo': 'a', 'baz': 'c'});
     deepEqual(model.omit('foo', 'bar'), {'baz': 'c'});
-    model.each(function(attr, index, attrs) {
-      ok(true);
-    });
-    equal(model.isEqual(model2.attributes), true);
-    equal(model.isEqual({ 'foo': 'a', 'bop': 'd' }), false);
-    equal(model.isEmpty(), false);
-    equal(model.size(), 3);
-    equal(model.chain().keys().contains('foo').value(), true);
-    deepEqual(model.sortBy(function(val) { return val === 'b' }), ["c", "a", "b"]);
-    deepEqual(model.groupBy(), {
-      'a': ['a'],
-      'b': ['b'],
-      'c': ['c']
-    });
   });
 
   test("clone", 10, function() {