public unsafe void TestLoadMissingAsset()
{
var assetManager = new AssetManager();
var asset = assetManager.Load<SimpleAsset>("inexisting/asset");
Assert.That(asset, Is.Null);
Assert.That(assetManager.HasAssetWithUrl("inexisting/asset"), Is.False);
SaveAssetsAndDeleteAChild(assetManager);
GC.Collect();
asset = assetManager.Load<SimpleAsset>("SimpleAssets/Pa");
Assert.That(asset, !Is.Null);
Assert.That(asset.Url, Is.EqualTo("SimpleAssets/Pa"));
Assert.That(asset.Child, Is.Null);
asset = assetManager.Load<SimpleAsset>("SimpleAssets/Son");
Assert.That(asset, Is.Null);
}