protected void setUp() throws Exception {
super.setUp();
TransformerRegistry registry = new TransformerRegistryImpl();
registry.registerTransformer(new String2SAX());
registry.registerTransformer(new SAX2DOMPipe());
registry.registerTransformer(new Node2String());
registry.registerTransformer(new Node2Writer());
mediator = new MediatorImpl();
mediator.setTransformerRegistry(registry);