using Explorer.Application;

namespace Explorer.Application.Tests;

public class MarqueeRangeTests
{
    [Fact]
    public void Stack_selects_rows_the_band_touches()
    {
        Assert.Equal([0, 1, 2], MarqueeRange.Stack(10, 70, 10, 24));
        Assert.Equal([1], MarqueeRange.Stack(24, 30, 10, 24));
        Assert.Equal([0], MarqueeRange.Stack(10, 10.2, 10, 24));
    }

    [Fact]
    public void Wrap_selects_tiles_the_band_covers()
    {
        // 3 columns, 40x40 cells. Band over the first two tiles of row 0 and the first of row 1.
        var hits = MarqueeRange.Wrap(5, 5, 55, 45, count: 8, columns: 3, itemWidth: 40, itemHeight: 40);
        Assert.Equal([0, 1, 3, 4], hits);
    }

    [Fact]
    public void Wrap_ignores_cells_past_the_item_count()
    {
        var hits = MarqueeRange.Wrap(0, 0, 120, 40, count: 2, columns: 3, itemWidth: 40, itemHeight: 40);
        Assert.Equal([0, 1], hits);
    }
}