public void BackwardDayChangesInPlanet_SubYears()
{
IDateAndTime date = new DateAndTime();
Galaxy g = new Galaxy();
g.CreateNormalGalaxy();
//One day changes
DateTime result = date.SubtractYears(g, 1);
Assert.AreEqual(result, new DateTime(2491, 5, 6, 1, 0, 0));
//0 days changes
result = date.SubtractYears(g, 0);
Assert.AreEqual(result, new DateTime(2491, 5, 6, 1, 0, 0));
}
private void Button2_Click(object sender, EventArgs e)
{
_date.SubtractYears(_galaxy, 1);
this.Invalidate();
}