public void EuclideanTest1() { double x1 = 1.5; double y1 = -2.1; double x2 = 4; double y2 = 1; double actual = Distance.Euclidean(x1, y1, x2, y2); Assert.AreEqual(3.9824615503479754, actual, 1e-10); Assert.IsFalse(double.IsNaN(actual)); }