cubic_spline 1.0.0

Function that calculates curve points for cubic spline
Documentation 
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use crate::{Error, Points, SplineOpts, TryFrom};

mod data_flatten;
mod data_tuples;

#[test]
fn bench1() {
  use std::time::Instant;

  let opts = SplineOpts::default();

  let mut v = Vec::new();

  let start = Instant::now();

  let points = Points::from(vec![
    (10.0, 200.0),
    (256.0, 390.0),
    (512.0, 10.0),
    (778.0, 200.0),
  ]);

  for _ in 0..10000 {
    let result = points.calc_spline(&opts).unwrap();

    v.push(result.get_ref().len());
  }

  let duration = start.elapsed();

  println!(">>>>>>>>>>>>   ms {:?}", duration.as_millis());

  // println!("{:?}", v.len());
}

#[test]
fn calc_spline_tst() {
  let points = data_tuples::points();
  let result_points = data_tuples::result();
  let opts = SplineOpts::default();

  let spline_points = Points::from(&points).calc_spline(&opts).unwrap();

  assert_eq!(result_points, Into::<Vec<(f64, f64)>>::into(spline_points));

  let pts_from_flatten = Points::try_from_flatten(&data_flatten::points())
    .unwrap()
    .calc_spline(&opts)
    .unwrap();

  assert_eq!(
    &Into::<Vec<f64>>::into(pts_from_flatten),
    &data_flatten::result()
  );
}

#[test]
fn calc_spline_err() {
  let opts = SplineOpts::new();
  let zero: Vec<(f64, f64)> = vec![];

  assert_eq!(Points::try_from(&zero).unwrap_err(), Error::TooFewPoints,);

  let zero_res = Points::from(&zero).calc_spline(&opts);
  assert_eq!(zero_res.unwrap_err(), Error::TooFewPoints);

  let one = vec![[1.0, 22_123.123]];
  assert_eq!(Points::try_from(&one).unwrap_err(), Error::TooFewPoints);
  assert_eq!(Points::try_from(&zero).unwrap_err(), Error::TooFewPoints);

  let one_res = Points::from(&one).calc_spline(&opts);
  assert_eq!(one_res.unwrap_err(), Error::TooFewPoints);
}

#[test]
fn calc_spline_flatten_err() {
  let opts = SplineOpts::new();

  assert_eq!(
    Points::try_from_flatten(&vec![]).unwrap_err(),
    Error::TooFewPoints,
  );

  assert_eq!(
    Points::try_from_flatten(&vec![1.1]).unwrap_err(),
    Error::MissingY,
  );

  assert_eq!(
    Points::try_from_flatten(&vec![1.1, 2.2]).unwrap_err(),
    Error::TooFewPoints,
  );

  assert_eq!(
    Points::try_from_flatten(&vec![1.1, 2.2, 3.3]).unwrap_err(),
    Error::MissingY,
  );

  let two_points = Points::try_from_flatten(&vec![1.1, 2.2, 3.3, 4.4]).unwrap();
  let two_points_res = two_points.calc_spline(&opts).unwrap();
  assert_eq!(two_points_res.get_ref().len(), 17,);
}

#[test]
fn calc_spline_arr_tst() {
  let points = data_tuples::points_arr();
  let result_points = data_tuples::result_arr();

  let opts = Default::default();

  let mut pts = Points::from(&points);
  pts.invert_vertically(400.0);
  let spline_points = pts.calc_spline(&opts).unwrap();

  assert_eq!(result_points, Into::<Vec<f64>>::into(spline_points));
  pts.invert_vertically(400.0);
  // pts.invert_horizontally(900.0);

  assert_eq!(
    pts.calc_spline(&opts).unwrap().get_ref().len() * 2,
    result_points.len()
  );

  let pts_from_flatten = Points::try_from_flatten(&data_flatten::points())
    .unwrap()
    .calc_spline(&SplineOpts::default())
    .unwrap();

  assert_eq!(
    &Into::<Vec<f64>>::into(pts_from_flatten),
    &data_flatten::result()
  );
}

#[test]
fn invert_tst() {
  let points = data_tuples::points_arr();
  let mut pts = Points::from(&points);
  let res1 = pts.calc_spline(&SplineOpts::default()).unwrap();

  pts.invert_vertically(1000.0);
  pts.invert_horizontally(1000.0);

  let res2 = pts.calc_spline(&SplineOpts::default()).unwrap();

  assert_eq!(res1.get_ref().len(), res2.get_ref().len())
}