public void TestGetAngleBetweenVectors(double[] v1, double[] v2, double expectedAngleRadians) { var vector1 = new Vector(v1); var vector2 = new Vector(v2); var vectorUtilities = new VectorUtilities(); var angleBetweenVectors = vectorUtilities.CalculateAngleBetweenVectors(vector1, vector2); Assert.LessOrEqual(Math.Abs(angleBetweenVectors.Radians - expectedAngleRadians), Epsilon); }