private Dependencies deps;
@Before
public void setup() {
op = new Operation("op");
source = new Source("source");
tf = new Transformation("tf");
target = new Target("target");
script = new Script("script");
opCalledFromScript = new Operation("opCalledFromScript");
deps = new Dependencies();
addLinks(op, script, source, tf, target);
addLinks(script, opCalledFromScript);
}