malevich 0.4.0

Terminal plotting: a small grammar of marks, honest axes, millions of points
Documentation 
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use super::{Line, Source};
use crate::render::Color;

const fn assert_send_sync<T: Send + Sync>() {}
const _: () = assert_send_sync::<Line<'static>>();

#[test]
#[should_panic(expected = "equal length")]
fn paired_series_of_unequal_lengths_panic() {
    Line::xy(&[1.0, 2.0][..], &[1.0][..]);
}

#[test]
#[should_panic(expected = "non-empty domain")]
fn an_empty_function_domain_panics() {
    #[allow(clippy::reversed_empty_ranges)]
    Line::function(5.0..5.0, f64::sin);
}

#[test]
fn explicit_colors_stick() {
    let line = Line::y(&[1.0, 2.0][..]).color(Color::Red);
    assert_eq!(line.color, Some(Color::Red));
}

#[test]
fn into_owned_detaches_from_borrowed_storage() {
    let values = vec![1.0, 2.0];
    let line = Line::y(values.as_slice()).into_owned();
    let Source::Points { y, .. } = &line.source else {
        panic!("expected points");
    };
    assert_ne!(y.as_slice().as_ptr(), values.as_ptr());
    assert_eq!(y.as_slice(), values.as_slice());
}

#[test]
fn debug_stays_curated() {
    let line = Line::y(&[1.0, 2.0, 3.0][..]);
    let debug = format!("{line:?}");
    assert!(debug.contains("points: 3"), "unexpected debug: {debug}");
    assert!(!debug.contains("1.0"), "debug dumps data: {debug}");
}