private void runTest(String test, OperationNode a) {
this.runTest(test, a, a.clone(), a.clone());
}
private void runTest(String test, OperationNode r, OperationNode g, OperationNode b) {
ColorNode tree = new RGB_Space(r, g, b);
byte[] actual = tree.compute(this.ip, true);
int w = this.opt.getWidth();
int h = this.opt.getHeight();
// write the image to show what we got so we can compare on failures
BufferedImage bactual = Output.dataToImage(actual, w, h);