Pac-Man/tests/blinking.rs

use glam::U16Vec2;
use pacman::texture::blinking::BlinkingTexture;
use pacman::texture::sprite::AtlasTile;
use sdl2::pixels::Color;

fn mock_atlas_tile(id: u32) -> AtlasTile {
    AtlasTile {
        pos: U16Vec2::new(0, 0),
        size: U16Vec2::new(16, 16),
        color: Some(Color::RGB(id as u8, 0, 0)),
    }
}

#[test]
fn test_tick_multiple_blink_changes() {
    let tile = mock_atlas_tile(1);
    let mut texture = BlinkingTexture::new(tile, 0.5);

    // First blink
    texture.tick(0.5);
    assert_eq!(texture.is_on(), false);

    // Second blink (back to on)
    texture.tick(0.5);
    assert_eq!(texture.is_on(), true);

    // Third blink (back to off)
    texture.tick(0.5);
    assert_eq!(texture.is_on(), false);
}

#[test]
fn test_tick_partial_blink_duration() {
    let tile = mock_atlas_tile(1);
    let mut texture = BlinkingTexture::new(tile, 0.5);

    // Tick with 1.25 blink durations
    texture.tick(0.625);
    assert_eq!(texture.is_on(), false);
    assert_eq!(texture.time_bank(), 0.125);
}

#[test]
fn test_tick_with_negative_delta_time() {
    let tile = mock_atlas_tile(1);
    let mut texture = BlinkingTexture::new(tile, 0.5);

    // Should not cause issues
    texture.tick(-0.1);
    assert_eq!(texture.is_on(), true);
    assert_eq!(texture.time_bank(), -0.1);
}