//! Pure Cycle 3 raster behavior tests.

use hcie_iced_gui::raster::apply_gradient;

#[test]
fn linear_gradient_interpolates_and_respects_mask() {
    let mut pixels = vec![0; 3 * 4];
    let mask = [255, 255, 0];
    apply_gradient(
        &mut pixels,
        3,
        1,
        (0.5, 0.5),
        (2.5, 0.5),
        false,
        [0, 0, 0, 255],
        [200, 100, 50, 255],
        1.0,
        Some(&mask),
    );
    assert_eq!(&pixels[0..4], &[0, 0, 0, 255]);
    assert_eq!(&pixels[4..8], &[100, 50, 25, 255]);
    assert_eq!(&pixels[8..12], &[0, 0, 0, 0]);
}

#[test]
fn radial_gradient_uses_distance_from_origin() {
    let mut pixels = vec![0; 3 * 4];
    apply_gradient(
        &mut pixels,
        3,
        1,
        (0.5, 0.5),
        (2.5, 0.5),
        true,
        [0, 0, 0, 255],
        [200, 0, 0, 255],
        1.0,
        None,
    );
    assert_eq!(pixels[0], 0);
    assert_eq!(pixels[4], 100);
    assert_eq!(pixels[8], 200);
}