public void RenderQueue_ColourEffectStage_CatchNullInputs()
{
var commandQueue = Substitute.For <IRenderCommandQueue>();
IRenderQueue queue = new RenderQueue(commandQueue);
var stage = Substitute.For <IColourEffectsStage>();
var source = Substitute.For <ITexture>();
var target = Substitute.For <IRenderTarget>();
Assert.Throws <Yak2DException>(() => { queue.ColourEffects(null, source, target); });
Assert.Throws <Yak2DException>(() => { queue.ColourEffects(stage, null, target); });
Assert.Throws <Yak2DException>(() => { queue.ColourEffects(stage, source, null); });
}