public void IntersectTest()
{
Vector2 a = (1, 1);
Vector2 b = (2, 3);
Vector2 c = (0, 2);
Vector2 d = (2, 1);
Vector2 e = (0, -2);
Line2 l1 = (a, b);
Line2 l2 = (c, d);
Line2 l3 = (e, d);
Assert.AreEqual(true, l1.IsSectionIntersectedBy(l2));
Assert.AreEqual(false, l1.IsSectionIntersectedBy(l3));
}