@Test(expected = InvalidSyntaxException.class)
public void testInitialTeeStep() throws Exception {

    // checks a Tee can not be an initial Step
    GauloisPipe piper = new GauloisPipe(configFactory);
    ConfigUtil cu = new ConfigUtil(configFactory.getConfiguration(), piper.getUriResolver(), "./src/test/resources/tee-initial-step.xml");
    Config config = cu.buildConfig(emptyInputParams);
    config.verify();
}