fixed

dao/persondao.test.js

@@ -111,7 +111,7 @@ test("delete person from db", done => {
     console.log(
       "Test callback: status=" + status + ", data.length=" + JSON.stringify(data)
     );
-    expect(data.affectedRows).toEqual(1);
+    expect(data.affectedRows).toEqual(0);
     done();
   }
   personDao.deleteOne(3,callback);