grim-rs 0.1.9

/// Tests for grid-aligned compositing optimization
/// These tests verify the detection logic for grid-aligned layouts,
/// which allows for optimized SRC-mode compositing instead of slower OVER mode.
use grim_rs::Region;

#[test]
fn test_box_no_overlap() {
    // Two boxes side by side (no overlap) - grid-aligned
    let box1 = Region::new(0, 0, 100, 100);
    let box2 = Region::new(100, 0, 100, 100);

    assert!(
        !box1.intersects(&box2),
        "Adjacent boxes should not intersect"
    );
}

#[test]
fn test_box_with_overlap() {
    // Two boxes with overlap - NOT grid-aligned
    let box1 = Region::new(0, 0, 100, 100);
    let box2 = Region::new(50, 50, 100, 100);

    assert!(box1.intersects(&box2), "Overlapping boxes should intersect");

    let intersection = box1.intersection(&box2).unwrap();
    assert_eq!(intersection.x(), 50);
    assert_eq!(intersection.y(), 50);
    assert_eq!(intersection.width(), 50);
    assert_eq!(intersection.height(), 50);
}

#[test]
fn test_grid_aligned_horizontal_layout() {
    // Two monitors side by side horizontally: [1920x1080] [1920x1080]
    let box1 = Region::new(0, 0, 1920, 1080);
    let box2 = Region::new(1920, 0, 1920, 1080);

    assert!(
        !box1.intersects(&box2),
        "Horizontal layout should not overlap"
    );
}

#[test]
fn test_grid_aligned_vertical_layout() {
    // Two monitors stacked vertically
    let box1 = Region::new(0, 0, 1920, 1080);
    let box2 = Region::new(0, 1080, 1920, 1080);

    assert!(
        !box1.intersects(&box2),
        "Vertical layout should not overlap"
    );
}

#[test]
fn test_grid_aligned_l_shape_layout() {
    // L-shaped layout (common in multi-monitor setups)
    // [1920x1080]
    // [1920x1080][1920x1080]
    let box1 = Region::new(0, 0, 1920, 1080); // Top
    let box2 = Region::new(0, 1080, 1920, 1080); // Bottom-left
    let box3 = Region::new(1920, 1080, 1920, 1080); // Bottom-right

    assert!(
        !box1.intersects(&box2),
        "Top and bottom-left should not overlap"
    );
    assert!(
        !box1.intersects(&box3),
        "Top and bottom-right should not overlap"
    );
    assert!(
        !box2.intersects(&box3),
        "Bottom monitors should not overlap"
    );
}

#[test]
fn test_non_grid_aligned_overlapping_monitors() {
    let box1 = Region::new(0, 0, 1920, 1080);
    let box2 = Region::new(1800, 0, 1920, 1080); // 120px overlap

    assert!(
        box1.intersects(&box2),
        "Overlapping monitors should intersect"
    );
}

#[test]
fn test_grid_aligned_triple_monitor() {
    let box_a = Region::new(0, 0, 1920, 1080);
    let box_b = Region::new(1920, 0, 1920, 1080);
    let box_c = Region::new(3840, 0, 1920, 1080);

    assert!(
        !box_a.intersects(&box_b),
        "Monitor A and B should not overlap"
    );
    assert!(
        !box_b.intersects(&box_c),
        "Monitor B and C should not overlap"
    );
    assert!(
        !box_a.intersects(&box_c),
        "Monitor A and C should not overlap"
    );
}

#[test]
fn test_grid_aligned_different_sizes() {
    // Different size monitors but still grid-aligned
    // [2560x1440] [1920x1080]
    let box1 = Region::new(0, 0, 2560, 1440);
    let box2 = Region::new(2560, 0, 1920, 1080);

    assert!(
        !box1.intersects(&box2),
        "Different size monitors can be grid-aligned"
    );
}

#[test]
fn test_region_intersection_within_output() {
    let output = Region::new(0, 0, 1920, 1080);
    let region = Region::new(100, 100, 800, 600);

    assert!(output.intersects(&region), "Region should be within output");

    let intersection = output.intersection(&region).unwrap();
    assert_eq!(intersection, region, "Intersection should equal the region");
}

#[test]
fn test_region_spanning_multiple_outputs() {
    let output1 = Region::new(0, 0, 1920, 1080);
    let output2 = Region::new(1920, 0, 1920, 1080);
    let region = Region::new(1800, 400, 240, 280);

    assert!(
        output1.intersects(&region),
        "Region should intersect first monitor"
    );
    assert!(
        output2.intersects(&region),
        "Region should intersect second monitor"
    );

    let int1 = output1.intersection(&region).unwrap();
    let int2 = output2.intersection(&region).unwrap();

    assert_eq!(int1.x(), 1800);
    assert_eq!(int1.width(), 120);

    assert_eq!(int2.x(), 1920);
    assert_eq!(int2.width(), 120);

    assert_eq!(int1.width() + int2.width(), region.width());
}

#[test]
fn test_pixel_alignment_check() {
    let box1 = Region::new(0, 0, 1920, 1080);
    let box2 = Region::new(1920, 0, 1920, 1080);

    assert_eq!(box1.x() + box1.width(), 1920);
    assert_eq!(box2.x(), 1920);

    assert!(!box1.intersects(&box2));
}

#[test]
fn test_empty_box_no_intersection() {
    let box1 = Region::new(0, 0, 100, 100);
    let box2 = Region::new(0, 0, 0, 0); // Empty box

    assert!(!box1.intersects(&box2), "Empty box should not intersect");
    assert!(box2.is_empty(), "Box with zero dimensions should be empty");
}