public void IntervalFromEndpoints()
{
Interval ab = Interval.FromEndpoints(a, b);
Interval ba = Interval.FromEndpoints(b, a);
Assert.IsTrue(ab.LeftEndpoint == ba.LeftEndpoint);
Assert.IsTrue(ab.RightEndpoint == ba.RightEndpoint);
Assert.IsTrue(ab.Width == ba.Width);
Assert.IsTrue(ab == ba);
Assert.IsFalse(ab != ba);
Assert.IsTrue(ab.GetHashCode() == ba.GetHashCode());
}