### Question:
NodeService { public String getData(String cluster, String path) throws ShepherException { return nodeDAO.getData(cluster, path); }  List<String> getChildren(String cluster, String path); String getData(String cluster, String path); Stat getStat(String cluster, String path); Stat getStat(String cluster, String path, boolean returnNullIfPathNotExists); void create(String cluster, String path, String data, String creator); void create(String cluster, String path, String data, String creator, boolean createParents); void createEphemeral(String cluster, String path, String data, String creator); void updateWithPermission(String cluster, String path, String data, String creator); void update(String cluster, String path, String data, String creator); void delete(String cluster, String path, String creator);  }### Answer:
@Test public void testGetData() throws Exception { String data = nodeService.getData("local_test", "/test"); Assert.assertNull(data); }