FS.dump(TestConf.tmpPath + "/group1/app1/file2", "test2");
FS.dump(TestConf.tmpPath + "/group1/app1/file3", "test3");
Store s = new Store(TestConf.host, TestConf.root, "", "", TestConf.tmpPath);
String pre = s.calMd5(TestConf.tmpPath + "/group1");
FS.dump(TestConf.tmpPath + "/group1/app1/file2", "test22");
String after = s.calMd5(TestConf.tmpPath + "/group1");
Assert.assertFalse(pre.equals(after));