You can now succeed

dao/persondao.test.js

@@ -104,7 +104,7 @@ test("Update person from db", done => {
     console.log(
         "Test callback: status = " + status + ", data = " + JSON.stringify(data)
     );
-    expect(data.affectedRows).toBe(420);
+    expect(data.affectedRows).toBe(1);
     done();
   }
   personDao.updateOne(