public void can_create_without_a_driver()
{
DriverModel driver = null;
var time = TimeSpan.FromSeconds(31.1);
var lapNumber = 10;
var delta = TimeSpan.FromSeconds(1.1);
var model = new FastestTimeModel(driver, time, lapNumber, delta);
Assert.Same(driver, model.Driver);
Assert.Equal(time, model.Time);
Assert.Equal(lapNumber, model.LapNumber);
Assert.Equal(delta, model.Delta);
}