using AcDream.App.Streaming;
using Xunit;

namespace AcDream.Core.Tests.Streaming;

public class StreamingRegionTwoTierTests
{
    [Fact]
    public void Constructor_TwoRadii_ExposesNearAndFarRadii()
    {
        var region = new StreamingRegion(centerX: 100, centerY: 100, nearRadius: 4, farRadius: 12);

        Assert.Equal(4, region.NearRadius);
        Assert.Equal(12, region.FarRadius);
        Assert.Equal(100, region.CenterX);
        Assert.Equal(100, region.CenterY);
        // Radius (used by existing single-radius hysteresis math) must alias to
        // FarRadius — the outer ring drives "everything currently loaded" bookkeeping.
        // If a future change mistakenly aliases Radius to NearRadius, hysteresis
        // becomes (NearRadius+2) for the far-tier unload, which is wrong.
        Assert.Equal(region.FarRadius, region.Radius);
    }
}