#[cfg(test)]
mod dqn_cuda_device_test {
    use candle_core::Device;

    #[test]
    fn test_cuda_available() {
        let device = Device::cuda_if_available(0);
        match device {
            Ok(dev) => {
                println!("Device: {:?}", dev);
                println!("Is CUDA: {}", dev.is_cuda());
                if dev.is_cuda() {
                    println!("✅ CUDA device available and selected");
                } else {
                    println!("⚠️  Device::cuda_if_available returned CPU (CUDA unavailable)");
                }
            }
            Err(e) => {
                println!("❌ Device::cuda_if_available error: {}", e);
            }
        }
    }
}