public void ColinearTest()
{
bool actual;
PointH p1 = new PointH(0, 1);
PointH p2 = new PointH(0, 2);
PointH p3 = new PointH(0, 3);
bool expected = true;
actual = Tools.Collinear(p1, p2, p3);
Assert.AreEqual(expected, actual);
p1 = new PointH(0, 1);
p2 = new PointH(1, 0);
p3 = new PointH(1, 1);
expected = false;
actual = Tools.Collinear(p1, p2, p3);
Assert.AreEqual(expected, actual);
}