using AcDream.App.UI;
using Xunit;

namespace AcDream.App.Tests.UI;

public class UiItemListTests
{
    [Fact]
    public void IsLeafWidget() => Assert.True(new UiItemList().ConsumesDatChildren);

    [Fact]
    public void StartsWithOneCell_forSingleCellSlot()
    {
        var list = new UiItemList();
        Assert.Equal(1, list.GetNumUIItems());
        Assert.NotNull(list.GetItem(0));
    }

    [Fact]
    public void Cell_returnsTheFirstSlot()
    {
        var list = new UiItemList();
        Assert.Same(list.GetItem(0), list.Cell);
    }

    [Fact]
    public void CellEmptySprite_stamps_existing_and_future_cells()
    {
        var list = new UiItemList();                                 // ctor adds one default cell
        Assert.Equal(0x060074CFu, list.GetItem(0)!.EmptySprite);     // UiItemSlot default before set

        list.CellEmptySprite = 0x06004D20u;                          // a pack-slot sprite
        Assert.Equal(0x06004D20u, list.GetItem(0)!.EmptySprite);     // existing cell re-stamped

        list.AddItem(new UiItemSlot());
        Assert.Equal(0x06004D20u, list.GetItem(1)!.EmptySprite);     // new cell stamped
    }

    [Fact]
    public void CellEmptySprite_zero_leaves_the_UiItemSlot_default()
    {
        var list = new UiItemList();
        list.CellEmptySprite = 0u;
        Assert.Equal(0x060074CFu, list.GetItem(0)!.EmptySprite);     // unchanged default
    }
}