public void RenderQueue_DrawStage_CatchNullInputs()
{
var commandQueue = Substitute.For <IRenderCommandQueue>();
IRenderQueue queue = new RenderQueue(commandQueue);
var stage = Substitute.For <IDrawStage>();
var camera = Substitute.For <ICamera2D>();
var target = Substitute.For <IRenderTarget>();
Assert.Throws <Yak2DException>(() => { queue.Draw(null, camera, target); });
Assert.Throws <Yak2DException>(() => { queue.Draw(stage, null, target); });
Assert.Throws <Yak2DException>(() => { queue.Draw(stage, camera, null); });
}