using System.Windows.Forms;
using UnitTestSharp;

namespace Blacklight.SharpDX9.UnitTesting
{
    public class SharpDX9WindowHandleTests : TestFixture
    {
        public class WaitForGpuTests : TestFixture
        {
            private Form window;
            private SharpDX9WindowHandle handle;

            public override void FixtureTeardown()
            {
                handle?.Dispose();
                window?.Dispose();
            }

            // Creating the real device (shader compile, driver init) alone burns past the framework's fixed
            // 500ms setup/teardown budget, so it happens here in the timed, [CpuTimeout]-widened test body
            // instead of FixtureSetup: the first of the repeated AllocationTest calls pays for it once, and every
            // call after reuses the same handle, which is exactly the steady state this test measures.
            [AllocationTest]
            [CpuTimeout(5000)]
            public void AllocatesNothingOnceWarm()
            {
                if (handle == null)
                {
                    window = new Form();
                    handle = (SharpDX9WindowHandle)new Module().CreateDrawableSurfaceOnWindow(window.Handle);
                    handle.MeasureGpuCompletion = true;
                }

                handle.WaitForGpu();
                CheckNoAllocations();
            }
        }
    }
}