146     var model = new Backbone.Model({foo: 'a', bar: 'b', baz: 'c'});  property
151     assert.deepEqual(model.pick('foo', 'baz'), {foo: 'a', baz: 'c'});  property
162     var a = new Backbone.Model({foo: 1, bar: 2, baz: 3});  property
170     a.set({foo: 100});  property
183     var a = new Backbone.Model({foo: 1, bar: 2, baz: 3});  property
185     a = new Backbone.Model({foo: 1, bar: 2, baz: 3, id: -5});  property
187     a = new Backbone.Model({foo: 1, bar: 2, baz: 3, id: 0});  property
273     var a = new Backbone.Model({id: 'id', foo: 1, bar: 2, baz: 3});  property
276     a.set({foo: 2});  property
280     a.set({foo: 2});  property
426       custom: {foo: 1}  property
432       custom: {foo: 1} // no change should be fired  property
435       custom: {foo: 2} // change event should be fired  property
774     var a = new Backbone.Model({foo: 1, bar: 2, baz: 3});  property
1442     model.set({foo: 'bar'});  property