HuasoFoundries / backbone_es6

(function() {

  var ProxyModel = Backbone.Model.extend();

  var Klass = Backbone.Collection.extend({

    url: function() { return '/collection'; }

  });

  var doc, collection;

  QUnit.module('Backbone.Model', {

    beforeEach: function(assert) {

      doc = new ProxyModel({

        id: '1-the-tempest',

        title: 'The Tempest',

        author: 'Bill Shakespeare',

        length: 123

      });

      collection = new Klass();

      collection.add(doc);

    }

  });

  QUnit.test('initialize', function(assert) {

    assert.expect(3);

    var Model = Backbone.Model.extend({

      initialize: function() {

        this.one = 1;

        assert.equal(this.collection, collection);

      }

    });

    var model = new Model({}, {collection: collection});

    assert.equal(model.one, 1);

    assert.equal(model.collection, collection);

  });

  QUnit.test('Object.prototype properties are overridden by attributes', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model({hasOwnProperty: true});

    assert.equal(model.get('hasOwnProperty'), true);

  });

  QUnit.test('initialize with attributes and options', function(assert) {

    assert.expect(1);

    var Model = Backbone.Model.extend({

      initialize: function(attributes, options) {

        this.one = options.one;

      }

    });

    var model = new Model({}, {one: 1});

    assert.equal(model.one, 1);

  });

  QUnit.test('initialize with parsed attributes', function(assert) {

    assert.expect(1);

    var Model = Backbone.Model.extend({

      parse: function(attrs) {

        attrs.value += 1;

        return attrs;

      }

    });

    var model = new Model({value: 1}, {parse: true});

    assert.equal(model.get('value'), 2);

  });

  QUnit.test('parse can return null', function(assert) {

    assert.expect(1);

    var Model = Backbone.Model.extend({

      parse: function(attrs) {

        attrs.value += 1;

        return null;

      }

    });

    var model = new Model({value: 1}, {parse: true});

    assert.equal(JSON.stringify(model.toJSON()), '{}');

  });

  QUnit.test('url', function(assert) {

    assert.expect(3);

    doc.urlRoot = null;

    assert.equal(doc.url(), '/collection/1-the-tempest');

    doc.collection.url = '/collection/';

    assert.equal(doc.url(), '/collection/1-the-tempest');

    doc.collection = null;

    assert.raises(function() { doc.url(); });

    doc.collection = collection;

  });

  QUnit.test('url when using urlRoot, and uri encoding', function(assert) {

    assert.expect(2);

    var Model = Backbone.Model.extend({

      urlRoot: '/collection'

    });

    var model = new Model();

    assert.equal(model.url(), '/collection');

    model.set({id: '+1+'});

    assert.equal(model.url(), '/collection/%2B1%2B');

  });

  QUnit.test('url when using urlRoot as a function to determine urlRoot at runtime', function(assert) {

    assert.expect(2);

    var Model = Backbone.Model.extend({

      urlRoot: function() {

        return '/nested/' + this.get('parentId') + '/collection';

      }

    });

    var model = new Model({parentId: 1});

    assert.equal(model.url(), '/nested/1/collection');

    model.set({id: 2});

    assert.equal(model.url(), '/nested/1/collection/2');

  });

  QUnit.test('underscore methods', function(assert) {

    assert.expect(5);

    var model = new Backbone.Model({foo: 'a', bar: 'b', baz: 'c'});

    var model2 = model.clone();

    assert.deepEqual(model.keys(), ['foo', 'bar', 'baz']);

    assert.deepEqual(model.values(), ['a', 'b', 'c']);

    assert.deepEqual(model.invert(), {a: 'foo', b: 'bar', c: 'baz'});

    assert.deepEqual(model.pick('foo', 'baz'), {foo: 'a', baz: 'c'});

    assert.deepEqual(model.omit('foo', 'bar'), {baz: 'c'});

  });

  QUnit.test('chain', function(assert) {

    var model = new Backbone.Model({a: 0, b: 1, c: 2});

    assert.deepEqual(model.chain().pick('a', 'b', 'c').values().compact().value(), [1, 2]);

  });

  QUnit.test('clone', function(assert) {

    assert.expect(10);

    var a = new Backbone.Model({foo: 1, bar: 2, baz: 3});

    var b = a.clone();

    assert.equal(a.get('foo'), 1);

    assert.equal(a.get('bar'), 2);

    assert.equal(a.get('baz'), 3);

    assert.equal(b.get('foo'), a.get('foo'), 'Foo should be the same on the clone.');

    assert.equal(b.get('bar'), a.get('bar'), 'Bar should be the same on the clone.');

    assert.equal(b.get('baz'), a.get('baz'), 'Baz should be the same on the clone.');

    a.set({foo: 100});

    assert.equal(a.get('foo'), 100);

    assert.equal(b.get('foo'), 1, 'Changing a parent attribute does not change the clone.');

    var foo = new Backbone.Model({p: 1});

    var bar = new Backbone.Model({p: 2});

    bar.set(foo.clone().attributes, {unset: true});

    assert.equal(foo.get('p'), 1);

    assert.equal(bar.get('p'), undefined);

  });

  QUnit.test('isNew', function(assert) {

    assert.expect(6);

    var a = new Backbone.Model({foo: 1, bar: 2, baz: 3});

    assert.ok(a.isNew(), 'it should be new');

    a = new Backbone.Model({foo: 1, bar: 2, baz: 3, id: -5});

    assert.ok(!a.isNew(), 'any defined ID is legal, negative or positive');

    a = new Backbone.Model({foo: 1, bar: 2, baz: 3, id: 0});

    assert.ok(!a.isNew(), 'any defined ID is legal, including zero');

    assert.ok(new Backbone.Model().isNew(), 'is true when there is no id');

    assert.ok(!new Backbone.Model({id: 2}).isNew(), 'is false for a positive integer');

    assert.ok(!new Backbone.Model({id: -5}).isNew(), 'is false for a negative integer');

  });

  QUnit.test('get', function(assert) {

    assert.expect(2);

    assert.equal(doc.get('title'), 'The Tempest');

    assert.equal(doc.get('author'), 'Bill Shakespeare');

  });

  QUnit.test('escape', function(assert) {

    assert.expect(5);

    assert.equal(doc.escape('title'), 'The Tempest');

    doc.set({audience: 'Bill & Bob'});

    assert.equal(doc.escape('audience'), 'Bill & Bob');

    doc.set({audience: 'Tim > Joan'});

    assert.equal(doc.escape('audience'), 'Tim > Joan');

    doc.set({audience: 10101});

    assert.equal(doc.escape('audience'), '10101');

    doc.unset('audience');

    assert.equal(doc.escape('audience'), '');

  });

  QUnit.test('has', function(assert) {

    assert.expect(10);

    var model = new Backbone.Model();

    assert.strictEqual(model.has('name'), false);

    model.set({

      '0': 0,

      '1': 1,

      'true': true,

      'false': false,

      'empty': '',

      'name': 'name',

      'null': null,

      'undefined': undefined

    });

    assert.strictEqual(model.has('0'), true);

    assert.strictEqual(model.has('1'), true);

    assert.strictEqual(model.has('true'), true);

    assert.strictEqual(model.has('false'), true);

    assert.strictEqual(model.has('empty'), true);

    assert.strictEqual(model.has('name'), true);

    model.unset('name');

    assert.strictEqual(model.has('name'), false);

    assert.strictEqual(model.has('null'), false);

    assert.strictEqual(model.has('undefined'), false);

  });

  QUnit.test('matches', function(assert) {

    assert.expect(4);

    var model = new Backbone.Model();

    assert.strictEqual(model.matches({name: 'Jonas', cool: true}), false);

    model.set({name: 'Jonas', cool: true});

    assert.strictEqual(model.matches({name: 'Jonas'}), true);

    assert.strictEqual(model.matches({name: 'Jonas', cool: true}), true);

    assert.strictEqual(model.matches({name: 'Jonas', cool: false}), false);

  });

  QUnit.test('matches with predicate', function(assert) {

    var model = new Backbone.Model({a: 0});

    assert.strictEqual(model.matches(function(attr) {

      return attr.a > 1 && attr.b != null;

    }), false);

    model.set({a: 3, b: true});

    assert.strictEqual(model.matches(function(attr) {

      return attr.a > 1 && attr.b != null;

    }), true);

  });

  QUnit.test('set and unset', function(assert) {

    assert.expect(8);

    var a = new Backbone.Model({id: 'id', foo: 1, bar: 2, baz: 3});

    var changeCount = 0;

    a.on('change:foo', function() { changeCount += 1; });

    a.set({foo: 2});

    assert.equal(a.get('foo'), 2, 'Foo should have changed.');

    assert.equal(changeCount, 1, 'Change count should have incremented.');

    // set with value that is not new shouldn't fire change event

    a.set({foo: 2});

    assert.equal(a.get('foo'), 2, 'Foo should NOT have changed, still 2');

    assert.equal(changeCount, 1, 'Change count should NOT have incremented.');

    a.validate = function(attrs) {

      assert.equal(attrs.foo, void 0, 'validate:true passed while unsetting');

    };

    a.unset('foo', {validate: true});

    assert.equal(a.get('foo'), void 0, 'Foo should have changed');

    delete a.validate;

    assert.equal(changeCount, 2, 'Change count should have incremented for unset.');

    a.unset('id');

    assert.equal(a.id, undefined, 'Unsetting the id should remove the id property.');

  });

  QUnit.test('#2030 - set with failed validate, followed by another set triggers change', function(assert) {

    var attr = 0, main = 0, error = 0;

    var Model = Backbone.Model.extend({

      validate: function(attrs) {

        if (attrs.x > 1) {

          error++;

          return 'this is an error';

        }

      }

    });

    var model = new Model({x: 0});

    model.on('change:x', function() { attr++; });

    model.on('change', function() { main++; });

    model.set({x: 2}, {validate: true});

    model.set({x: 1}, {validate: true});

    assert.deepEqual([attr, main, error], [1, 1, 1]);

  });

  QUnit.test('set triggers changes in the correct order', function(assert) {

    var value = null;

    var model = new Backbone.Model;

    model.on('last', function(){ value = 'last'; });

    model.on('first', function(){ value = 'first'; });

    model.trigger('first');

    model.trigger('last');

    assert.equal(value, 'last');

  });

  QUnit.test('set falsy values in the correct order', function(assert) {

    assert.expect(2);

    var model = new Backbone.Model({result: 'result'});

    model.on('change', function() {

      assert.equal(model.changed.result, void 0);

      assert.equal(model.previous('result'), false);

    });

    model.set({result: void 0}, {silent: true});

    model.set({result: null}, {silent: true});

    model.set({result: false}, {silent: true});

    model.set({result: void 0});

  });

  QUnit.test('nested set triggers with the correct options', function(assert) {

    var model = new Backbone.Model();

    var o1 = {};

    var o2 = {};

    var o3 = {};

    model.on('change', function(__, options) {

      switch (model.get('a')) {

        case 1:

          assert.equal(options, o1);

          return model.set('a', 2, o2);

        case 2:

          assert.equal(options, o2);

          return model.set('a', 3, o3);

        case 3:

          assert.equal(options, o3);

      }

    });

    model.set('a', 1, o1);

  });

  QUnit.test('multiple unsets', function(assert) {

    assert.expect(1);

    var i = 0;

    var counter = function(){ i++; };

    var model = new Backbone.Model({a: 1});

    model.on('change:a', counter);

    model.set({a: 2});

    model.unset('a');

    model.unset('a');

    assert.equal(i, 2, 'Unset does not fire an event for missing attributes.');

  });

  QUnit.test('unset and changedAttributes', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model({a: 1});

    model.on('change', function() {

      assert.ok('a' in model.changedAttributes(), 'changedAttributes should contain unset properties');

    });

    model.unset('a');

  });

  QUnit.test('using a non-default id attribute.', function(assert) {

    assert.expect(5);

    var MongoModel = Backbone.Model.extend({idAttribute: '_id'});

    var model = new MongoModel({id: 'eye-dee', _id: 25, title: 'Model'});

    assert.equal(model.get('id'), 'eye-dee');

    assert.equal(model.id, 25);

    assert.equal(model.isNew(), false);

    model.unset('_id');

    assert.equal(model.id, undefined);

    assert.equal(model.isNew(), true);

  });

  QUnit.test('setting an alternative cid prefix', function(assert) {

    assert.expect(4);

    var Model = Backbone.Model.extend({

      cidPrefix: 'm'

    });

    var model = new Model();

    assert.equal(model.cid.charAt(0), 'm');

    model = new Backbone.Model();

    assert.equal(model.cid.charAt(0), 'c');

    var Collection = Backbone.Collection.extend({

      model: Model

    });

    var col = new Collection([{id: 'c5'}, {id: 'c6'}, {id: 'c7'}]);

    assert.equal(col.get('c6').cid.charAt(0), 'm');

    col.set([{id: 'c6', value: 'test'}], {

      merge: true,

      add: true,

      remove: false

    });

    assert.ok(col.get('c6').has('value'));

  });

  QUnit.test('set an empty string', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model({name: 'Model'});

    model.set({name: ''});

    assert.equal(model.get('name'), '');

  });

  QUnit.test('setting an object', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model({

      custom: {foo: 1}

    });

    model.on('change', function() {

      assert.ok(1);

    });

    model.set({

      custom: {foo: 1} // no change should be fired

    });

    model.set({

      custom: {foo: 2} // change event should be fired

    });

  });

  QUnit.test('clear', function(assert) {

    assert.expect(3);

    var changed;

    var model = new Backbone.Model({id: 1, name: 'Model'});

    model.on('change:name', function(){ changed = true; });

    model.on('change', function() {

      var changedAttrs = model.changedAttributes();

      assert.ok('name' in changedAttrs);

    });

    model.clear();

    assert.equal(changed, true);

    assert.equal(model.get('name'), undefined);

  });

  QUnit.test('defaults', function(assert) {

    assert.expect(9);

    var Defaulted = Backbone.Model.extend({

      defaults: {

        one: 1,

        two: 2

      }

    });

    var model = new Defaulted({two: undefined});

    assert.equal(model.get('one'), 1);

    assert.equal(model.get('two'), 2);

    model = new Defaulted({two: 3});

    assert.equal(model.get('one'), 1);

    assert.equal(model.get('two'), 3);

    Defaulted = Backbone.Model.extend({

      defaults: function() {

        return {

          one: 3,

          two: 4

        };

      }

    });

    model = new Defaulted({two: undefined});

    assert.equal(model.get('one'), 3);

    assert.equal(model.get('two'), 4);

    Defaulted = Backbone.Model.extend({

      defaults: {hasOwnProperty: true}

    });

    model = new Defaulted();

    assert.equal(model.get('hasOwnProperty'), true);

    model = new Defaulted({hasOwnProperty: undefined});

    assert.equal(model.get('hasOwnProperty'), true);

    model = new Defaulted({hasOwnProperty: false});

    assert.equal(model.get('hasOwnProperty'), false);

  });

  QUnit.test('change, hasChanged, changedAttributes, previous, previousAttributes', function(assert) {

    assert.expect(9);

    var model = new Backbone.Model({name: 'Tim', age: 10});

    assert.deepEqual(model.changedAttributes(), false);

    model.on('change', function() {

      assert.ok(model.hasChanged('name'), 'name changed');

      assert.ok(!model.hasChanged('age'), 'age did not');

      assert.ok(_.isEqual(model.changedAttributes(), {name: 'Rob'}), 'changedAttributes returns the changed attrs');

      assert.equal(model.previous('name'), 'Tim');

      assert.ok(_.isEqual(model.previousAttributes(), {name: 'Tim', age: 10}), 'previousAttributes is correct');

    });

    assert.equal(model.hasChanged(), false);

    assert.equal(model.hasChanged(undefined), false);

    model.set({name: 'Rob'});

    assert.equal(model.get('name'), 'Rob');

  });

  QUnit.test('changedAttributes', function(assert) {

    assert.expect(3);

    var model = new Backbone.Model({a: 'a', b: 'b'});

    assert.deepEqual(model.changedAttributes(), false);

    assert.equal(model.changedAttributes({a: 'a'}), false);

    assert.equal(model.changedAttributes({a: 'b'}).a, 'b');

  });

  QUnit.test('change with options', function(assert) {

    assert.expect(2);

    var value;

    var model = new Backbone.Model({name: 'Rob'});

    model.on('change', function(m, options) {

      value = options.prefix + m.get('name');

    });

    model.set({name: 'Bob'}, {prefix: 'Mr. '});

    assert.equal(value, 'Mr. Bob');

    model.set({name: 'Sue'}, {prefix: 'Ms. '});

    assert.equal(value, 'Ms. Sue');

  });

  QUnit.test('change after initialize', function(assert) {

    assert.expect(1);

    var changed = 0;

    var attrs = {id: 1, label: 'c'};

    var obj = new Backbone.Model(attrs);

    obj.on('change', function() { changed += 1; });

    obj.set(attrs);

    assert.equal(changed, 0);

  });

  QUnit.test('save within change event', function(assert) {

    assert.expect(1);

    var env = this;

    var model = new Backbone.Model({firstName: 'Taylor', lastName: 'Swift'});

    model.url = '/test';

    model.on('change', function() {

      model.save();

      assert.ok(_.isEqual(env.syncArgs.model, model));

    });

    model.set({lastName: 'Hicks'});

  });

  QUnit.test('validate after save', function(assert) {

    assert.expect(2);

    var lastError, model = new Backbone.Model();

    model.validate = function(attrs) {

      if (attrs.admin) return "Can't change admin status.";

    };

    model.sync = function(method, m, options) {

      options.success.call(this, {admin: true});

    };

    model.on('invalid', function(m, error) {

      lastError = error;

    });

    model.save(null);

    assert.equal(lastError, "Can't change admin status.");

    assert.equal(model.validationError, "Can't change admin status.");

  });

  QUnit.test('save', function(assert) {

    assert.expect(2);

    doc.save({title: 'Henry V'});

    assert.equal(this.syncArgs.method, 'update');

    assert.ok(_.isEqual(this.syncArgs.model, doc));

  });

  QUnit.test('save, fetch, destroy triggers error event when an error occurs', function(assert) {

    assert.expect(3);

    var model = new Backbone.Model();

    model.on('error', function() {

      assert.ok(true);

    });

    model.sync = function(method, m, options) {

      options.error();

    };

    model.save({data: 2, id: 1});

    model.fetch();

    model.destroy();

  });

  QUnit.test('#3283 - save, fetch, destroy calls success with context', function(assert) {

    assert.expect(3);

    var model = new Backbone.Model();

    var obj = {};

    var options = {

      context: obj,

      success: function() {

        assert.equal(this, obj);

      }

    };

    model.sync = function(method, m, opts) {

      opts.success.call(opts.context);

    };

    model.save({data: 2, id: 1}, options);

    model.fetch(options);

    model.destroy(options);

  });

  QUnit.test('#3283 - save, fetch, destroy calls error with context', function(assert) {

    assert.expect(3);

    var model = new Backbone.Model();

    var obj = {};

    var options = {

      context: obj,

      error: function() {

        assert.equal(this, obj);

      }

    };

    model.sync = function(method, m, opts) {

      opts.error.call(opts.context);

    };

    model.save({data: 2, id: 1}, options);

    model.fetch(options);

    model.destroy(options);

  });

  QUnit.test('#3470 - save and fetch with parse false', function(assert) {

    assert.expect(2);

    var i = 0;

    var model = new Backbone.Model();

    model.parse = function() {

      assert.ok(false);

    };

    model.sync = function(method, m, options) {

      options.success({i: ++i});

    };

    model.fetch({parse: false});

    assert.equal(model.get('i'), i);

    model.save(null, {parse: false});

    assert.equal(model.get('i'), i);

  });

  QUnit.test('save with PATCH', function(assert) {

    doc.clear().set({id: 1, a: 1, b: 2, c: 3, d: 4});

    doc.save();

    assert.equal(this.syncArgs.method, 'update');

    assert.equal(this.syncArgs.options.attrs, undefined);

    doc.save({b: 2, d: 4}, {patch: true});

    assert.equal(this.syncArgs.method, 'patch');

    assert.equal(_.size(this.syncArgs.options.attrs), 2);

    assert.equal(this.syncArgs.options.attrs.d, 4);

    assert.equal(this.syncArgs.options.attrs.a, undefined);

    assert.equal(this.ajaxSettings.data, '{"b":2,"d":4}');

  });

  QUnit.test('save with PATCH and different attrs', function(assert) {

    doc.clear().save({b: 2, d: 4}, {patch: true, attrs: {B: 1, D: 3}});

    assert.equal(this.syncArgs.options.attrs.D, 3);

    assert.equal(this.syncArgs.options.attrs.d, undefined);

    assert.equal(this.ajaxSettings.data, '{"B":1,"D":3}');

    assert.deepEqual(doc.attributes, {b: 2, d: 4});

  });

  QUnit.test('save in positional style', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model();

    model.sync = function(method, m, options) {

      options.success();

    };

    model.save('title', 'Twelfth Night');

    assert.equal(model.get('title'), 'Twelfth Night');

  });

  QUnit.test('save with non-object success response', function(assert) {

    assert.expect(2);

    var model = new Backbone.Model();

    model.sync = function(method, m, options) {

      options.success('', options);

      options.success(null, options);

    };

    model.save({testing: 'empty'}, {

      success: function(m) {

        assert.deepEqual(m.attributes, {testing: 'empty'});

      }

    });

  });

  QUnit.test('save with wait and supplied id', function(assert) {

    var Model = Backbone.Model.extend({

      urlRoot: '/collection'

    });

    var model = new Model();

    model.save({id: 42}, {wait: true});

    assert.equal(this.ajaxSettings.url, '/collection/42');

  });

  QUnit.test('save will pass extra options to success callback', function(assert) {

    assert.expect(1);

    var SpecialSyncModel = Backbone.Model.extend({

      sync: function(method, m, options) {

        _.extend(options, {specialSync: true});

        return Backbone.Model.prototype.sync.call(this, method, m, options);

      },

      urlRoot: '/test'

    });

    var model = new SpecialSyncModel();

    var onSuccess = function(m, response, options) {

      assert.ok(options.specialSync, 'Options were passed correctly to callback');

    };

    model.save(null, {success: onSuccess});

    this.ajaxSettings.success();

  });

  QUnit.test('fetch', function(assert) {

    assert.expect(2);

    doc.fetch();

    assert.equal(this.syncArgs.method, 'read');

    assert.ok(_.isEqual(this.syncArgs.model, doc));

  });

  QUnit.test('fetch will pass extra options to success callback', function(assert) {

    assert.expect(1);

    var SpecialSyncModel = Backbone.Model.extend({

      sync: function(method, m, options) {

        _.extend(options, {specialSync: true});

        return Backbone.Model.prototype.sync.call(this, method, m, options);

      },

      urlRoot: '/test'

    });

    var model = new SpecialSyncModel();

    var onSuccess = function(m, response, options) {

      assert.ok(options.specialSync, 'Options were passed correctly to callback');

    };

    model.fetch({success: onSuccess});

    this.ajaxSettings.success();

  });

  QUnit.test('destroy', function(assert) {

    assert.expect(3);

    doc.destroy();

    assert.equal(this.syncArgs.method, 'delete');

    assert.ok(_.isEqual(this.syncArgs.model, doc));

    var newModel = new Backbone.Model;

    assert.equal(newModel.destroy(), false);

  });

  QUnit.test('destroy will pass extra options to success callback', function(assert) {

    assert.expect(1);

    var SpecialSyncModel = Backbone.Model.extend({

      sync: function(method, m, options) {

        _.extend(options, {specialSync: true});

        return Backbone.Model.prototype.sync.call(this, method, m, options);

      },

      urlRoot: '/test'

    });

    var model = new SpecialSyncModel({id: 'id'});

    var onSuccess = function(m, response, options) {

      assert.ok(options.specialSync, 'Options were passed correctly to callback');

    };

    model.destroy({success: onSuccess});

    this.ajaxSettings.success();

  });

  QUnit.test('non-persisted destroy', function(assert) {

    assert.expect(1);

    var a = new Backbone.Model({foo: 1, bar: 2, baz: 3});

    a.sync = function() { throw 'should not be called'; };

    a.destroy();

    assert.ok(true, 'non-persisted model should not call sync');

  });

  QUnit.test('validate', function(assert) {

    var lastError;

    var model = new Backbone.Model();

    model.validate = function(attrs) {

      if (attrs.admin !== this.get('admin')) return "Can't change admin status.";

    };

    model.on('invalid', function(m, error) {

      lastError = error;

    });

    var result = model.set({a: 100});

    assert.equal(result, model);

    assert.equal(model.get('a'), 100);

    assert.equal(lastError, undefined);

    result = model.set({admin: true});

    assert.equal(model.get('admin'), true);

    result = model.set({a: 200, admin: false}, {validate: true});

    assert.equal(lastError, "Can't change admin status.");

    assert.equal(result, false);

    assert.equal(model.get('a'), 100);

  });

  QUnit.test('validate on unset and clear', function(assert) {

    assert.expect(6);

    var error;

    var model = new Backbone.Model({name: 'One'});

    model.validate = function(attrs) {

      if (!attrs.name) {

        error = true;

        return 'No thanks.';

      }

    };

    model.set({name: 'Two'});

    assert.equal(model.get('name'), 'Two');

    assert.equal(error, undefined);

    model.unset('name', {validate: true});

    assert.equal(error, true);

    assert.equal(model.get('name'), 'Two');

    model.clear({validate: true});

    assert.equal(model.get('name'), 'Two');

    delete model.validate;

    model.clear();

    assert.equal(model.get('name'), undefined);

  });

  QUnit.test('validate with error callback', function(assert) {

    assert.expect(8);

    var lastError, boundError;

    var model = new Backbone.Model();

    model.validate = function(attrs) {

      if (attrs.admin) return "Can't change admin status.";

    };

    model.on('invalid', function(m, error) {

      boundError = true;

    });

    var result = model.set({a: 100}, {validate: true});

    assert.equal(result, model);

    assert.equal(model.get('a'), 100);

    assert.equal(model.validationError, null);

    assert.equal(boundError, undefined);

    result = model.set({a: 200, admin: true}, {validate: true});

    assert.equal(result, false);

    assert.equal(model.get('a'), 100);

    assert.equal(model.validationError, "Can't change admin status.");

    assert.equal(boundError, true);

  });

  QUnit.test('defaults always extend attrs (#459)', function(assert) {

    assert.expect(2);

    var Defaulted = Backbone.Model.extend({

      defaults: {one: 1},

      initialize: function(attrs, opts) {

        assert.equal(this.attributes.one, 1);

      }

    });

    var providedattrs = new Defaulted({});

    var emptyattrs = new Defaulted();

  });

  QUnit.test('Inherit class properties', function(assert) {

    assert.expect(6);

    var Parent = Backbone.Model.extend({

      instancePropSame: function() {},

      instancePropDiff: function() {}

    }, {

      classProp: function() {}

    });

    var Child = Parent.extend({

      instancePropDiff: function() {}

    });

    var adult = new Parent;

    var kid   = new Child;

    assert.equal(Child.classProp, Parent.classProp);

    assert.notEqual(Child.classProp, undefined);

    assert.equal(kid.instancePropSame, adult.instancePropSame);

    assert.notEqual(kid.instancePropSame, undefined);

    assert.notEqual(Child.prototype.instancePropDiff, Parent.prototype.instancePropDiff);

    assert.notEqual(Child.prototype.instancePropDiff, undefined);

  });

  QUnit.test("Nested change events don't clobber previous attributes", function(assert) {

    assert.expect(4);

    new Backbone.Model()

    .on('change:state', function(m, newState) {

      assert.equal(m.previous('state'), undefined);

      assert.equal(newState, 'hello');

      // Fire a nested change event.

      m.set({other: 'whatever'});

    })

    .on('change:state', function(m, newState) {

      assert.equal(m.previous('state'), undefined);

      assert.equal(newState, 'hello');

    })

    .set({state: 'hello'});

  });

  QUnit.test('hasChanged/set should use same comparison', function(assert) {

    assert.expect(2);

    var changed = 0, model = new Backbone.Model({a: null});

    model.on('change', function() {

      assert.ok(this.hasChanged('a'));

    })

    .on('change:a', function() {

      changed++;

    })

    .set({a: undefined});

    assert.equal(changed, 1);

  });

  QUnit.test('#582, #425, change:attribute callbacks should fire after all changes have occurred', function(assert) {

    assert.expect(9);

    var model = new Backbone.Model;

    var assertion = function() {

      assert.equal(model.get('a'), 'a');

      assert.equal(model.get('b'), 'b');

      assert.equal(model.get('c'), 'c');

    };

    model.on('change:a', assertion);

    model.on('change:b', assertion);

    model.on('change:c', assertion);

    model.set({a: 'a', b: 'b', c: 'c'});

  });

  QUnit.test('#871, set with attributes property', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model();

    model.set({attributes: true});

    assert.ok(model.has('attributes'));

  });

  QUnit.test('set value regardless of equality/change', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model({x: []});

    var a = [];

    model.set({x: a});

    assert.ok(model.get('x') === a);

  });

  QUnit.test('set same value does not trigger change', function(assert) {

    assert.expect(0);

    var model = new Backbone.Model({x: 1});

    model.on('change change:x', function() { assert.ok(false); });

    model.set({x: 1});

    model.set({x: 1});

  });

  QUnit.test('unset does not fire a change for undefined attributes', function(assert) {

    assert.expect(0);

    var model = new Backbone.Model({x: undefined});

    model.on('change:x', function(){ assert.ok(false); });

    model.unset('x');

  });

  QUnit.test('set: undefined values', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model({x: undefined});

    assert.ok('x' in model.attributes);

  });

  QUnit.test('hasChanged works outside of change events, and true within', function(assert) {

    assert.expect(6);

    var model = new Backbone.Model({x: 1});

    model.on('change:x', function() {

      assert.ok(model.hasChanged('x'));

      assert.equal(model.get('x'), 1);

    });

    model.set({x: 2}, {silent: true});

    assert.ok(model.hasChanged());

    assert.equal(model.hasChanged('x'), true);

    model.set({x: 1});

    assert.ok(model.hasChanged());

    assert.equal(model.hasChanged('x'), true);

  });

  QUnit.test('hasChanged gets cleared on the following set', function(assert) {

    assert.expect(4);

    var model = new Backbone.Model;

    model.set({x: 1});

    assert.ok(model.hasChanged());

    model.set({x: 1});

    assert.ok(!model.hasChanged());

    model.set({x: 2});

    assert.ok(model.hasChanged());

    model.set({});

    assert.ok(!model.hasChanged());

  });

  QUnit.test('save with `wait` succeeds without `validate`', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model();

    model.url = '/test';

    model.save({x: 1}, {wait: true});

    assert.ok(this.syncArgs.model === model);

  });

  QUnit.test("save without `wait` doesn't set invalid attributes", function(assert) {

    var model = new Backbone.Model();

    model.validate = function() { return 1; };

    model.save({a: 1});

    assert.equal(model.get('a'), void 0);

  });

  QUnit.test("save doesn't validate twice", function(assert) {

    var model = new Backbone.Model();

    var times = 0;

    model.sync = function() {};

    model.validate = function() { ++times; };

    model.save({});

    assert.equal(times, 1);

  });

  QUnit.test('`hasChanged` for falsey keys', function(assert) {

    assert.expect(2);

    var model = new Backbone.Model();

    model.set({x: true}, {silent: true});

    assert.ok(!model.hasChanged(0));

    assert.ok(!model.hasChanged(''));

  });

  QUnit.test('`previous` for falsey keys', function(assert) {

    assert.expect(2);

    var model = new Backbone.Model({'0': true, '': true});

    model.set({'0': false, '': false}, {silent: true});

    assert.equal(model.previous(0), true);

    assert.equal(model.previous(''), true);

  });

  QUnit.test('`save` with `wait` sends correct attributes', function(assert) {

    assert.expect(5);

    var changed = 0;

    var model = new Backbone.Model({x: 1, y: 2});

    model.url = '/test';

    model.on('change:x', function() { changed++; });

    model.save({x: 3}, {wait: true});

    assert.deepEqual(JSON.parse(this.ajaxSettings.data), {x: 3, y: 2});

    assert.equal(model.get('x'), 1);

    assert.equal(changed, 0);

    this.syncArgs.options.success({});

    assert.equal(model.get('x'), 3);

    assert.equal(changed, 1);

  });

  QUnit.test("a failed `save` with `wait` doesn't leave attributes behind", function(assert) {

    assert.expect(1);

    var model = new Backbone.Model;

    model.url = '/test';

    model.save({x: 1}, {wait: true});

    assert.equal(model.get('x'), void 0);

  });

  QUnit.test('#1030 - `save` with `wait` results in correct attributes if success is called during sync', function(assert) {

    assert.expect(2);

    var model = new Backbone.Model({x: 1, y: 2});

    model.sync = function(method, m, options) {

      options.success();

    };

    model.on('change:x', function() { assert.ok(true); });

    model.save({x: 3}, {wait: true});

    assert.equal(model.get('x'), 3);

  });

  QUnit.test('save with wait validates attributes', function(assert) {

    var model = new Backbone.Model();

    model.url = '/test';

    model.validate = function() { assert.ok(true); };

    model.save({x: 1}, {wait: true});

  });

  QUnit.test('save turns on parse flag', function(assert) {

    var Model = Backbone.Model.extend({

      sync: function(method, m, options) { assert.ok(options.parse); }

    });

    new Model().save();

  });

  QUnit.test("nested `set` during `'change:attr'`", function(assert) {

    assert.expect(2);

    var events = [];

    var model = new Backbone.Model();

    model.on('all', function(event) { events.push(event); });

    model.on('change', function() {

      model.set({z: true}, {silent: true});

    });

    model.on('change:x', function() {

      model.set({y: true});

    });

    model.set({x: true});

    assert.deepEqual(events, ['change:y', 'change:x', 'change']);

    events = [];

    model.set({z: true});

    assert.deepEqual(events, []);

  });

  QUnit.test('nested `change` only fires once', function(assert) {

    assert.expect(1);

    var model = new Backbone.Model();

    model.on('change', function() {

      assert.ok(true);

      model.set({x: true});

    });

    model.set({x: true});

  });

  QUnit.test("nested `set` during `'change'`", function(assert) {

    assert.expect(6);

    var count = 0;

    var model = new Backbone.Model();

    model.on('change', function() {

      switch (count++) {

        case 0:

          assert.deepEqual(this.changedAttributes(), {x: true});

          assert.equal(model.previous('x'), undefined);

          model.set({y: true});

          break;

        case 1:

          assert.deepEqual(this.changedAttributes(), {x: true, y: true});

          assert.equal(model.previous('x'), undefined);

          model.set({z: true});

          break;

        case 2:

          assert.deepEqual(this.changedAttributes(), {x: true, y: true, z: true});

          assert.equal(model.previous('y'), undefined);

          break;

        default:

          assert.ok(false);

      }

    });

    model.set({x: true});

  });

  QUnit.test('nested `change` with silent', function(assert) {

    assert.expect(3);

    var count = 0;