   it('should check ng-options', function() {
     expect(element(by.binding('{selected_color:myColor}')).getText()).toMatch('red');
     element.all(by.model('myColor')).first().click();
     element.all(by.css('select[ng-model="myColor"] option')).first().click();
     expect(element(by.binding('{selected_color:myColor}')).getText()).toMatch('black');
     element(by.css('.nullable select[ng-model="myColor"]')).click();
     element.all(by.css('.nullable select[ng-model="myColor"] option')).first().click();
     expect(element(by.binding('{selected_color:myColor}')).getText()).toMatch('null');
   });