#[cfg(test)]
mod unit_tests {
    use peak_finder::data::{slope2d::Slope2D, errors::DivisionByZero, find_inflection_point, is_more, is_less};
    #[test]
    fn test_slope() {
        let test_point_one = (1.0_f32, 1.0_f32);
        let test_point_two = (2.0_f32, 2.0_f32);
        assert_eq!(Slope2D::new(test_point_one, test_point_two).unwrap().is, 1.0_f32);
        assert!(Slope2D::new(test_point_one, test_point_one).is_err());
        assert_eq!(Slope2D::new(test_point_one, test_point_one).unwrap_err(), DivisionByZero);
    }

    #[test]
    fn test_inflection_point() {
        assert_eq!(find_inflection_point(&Vec::from([2,3,4,5,3,1,2]), is_less).unwrap(), (3, 5));
        assert_eq!(find_inflection_point(&Vec::from([5,4,3,2,1,2,3]), is_more).unwrap(), (4, 1));
    }
}