using AcDream.App.Rendering;
using AcDream.App.Rendering.Wb;
using DatReaderWriter;
using Xunit;

namespace AcDream.Core.Tests.Rendering;

/// <summary>
/// Lightweight unit tests for <see cref="TextureCache"/>'s bindless path.
/// We can't construct a real TextureCache in a headless test (it requires a
/// live GL context), so this file documents contracts that future engineers
/// should preserve. Real bindless integration is verified at Task 14's
/// visual gate.
/// </summary>
public sealed class TextureCacheBindlessTests
{
    [Fact]
    public void Contract_BindlessMethodsThrowWithoutBindlessSupport()
    {
        // The actual throw lives in TextureCache.EnsureBindlessAvailable
        // and is reached only via GL-bound Bindless* method calls. The
        // contract is: if the dispatcher (which requires bindless) ever
        // gets a TextureCache constructed without BindlessSupport, it
        // should fail-fast with InvalidOperationException — NOT silently
        // route a draw to handle 0 (which would produce a non-resident
        // GPU fault).
        //
        // This test is a marker. Future engineers: do not weaken
        // EnsureBindlessAvailable to swallow the missing dependency.
        Assert.True(true, "Contract documented in TextureCache.EnsureBindlessAvailable");
    }
}