public void CircleFromThreePointsArgumentException()
{
var p1 = new Point2D(0, 0);
var p2 = new Point2D(-1, 0);
var p3 = new Point2D(1, 0);
Assert.Throws <ArgumentException>(() => { Circle2D.FromPoints(p1, p2, p3); });
}
public void CircleFromThreePoints(string p1s, string p2s, string p3s, string centers, double radius)
{
var p1 = Point2D.Parse(p1s);
var p2 = Point2D.Parse(p2s);
var p3 = Point2D.Parse(p3s);
var center = Point2D.Parse(centers);
var circle = Circle2D.FromPoints(p1, p2, p3);
AssertGeometry.AreEqual(center, circle.Center);
Assert.AreEqual(radius, circle.Radius, 1e-6);
}