public void Add()
{
var halfDay = .5.Days();
Assert.Equal(4, 3.5.Days().Add(halfDay).Days);
var timeSpan = new TimeSpan(3, 12, 0, 0);
Assert.Equal(4, timeSpan.AddFluentTimeSpan(halfDay).Days);
Assert.Equal(4, (timeSpan + halfDay).Days);
Assert.Equal(4, (halfDay + timeSpan).Days);
}
