var model = element(by.binding('model'));
var input = element(by.id('input'));

it('should validate the input with the default pattern', function () {
    input.sendKeys('aaa');
    expect(model.getText()).not.toContain('aaa');

    input.clear().then(function () {
        input.sendKeys('123');
        expect(model.getText()).toContain('123');
    });
});