Its easy to say, "I test like user". Let us admit that, we can't test exactly like how users do. Users are users and even when we testers test and feel like we are testing like users, but in actual its our tester instinct mixed with a bit of user mindset may be. We don't know for sure! However, the good news is we could use various approaches in order to test like users to certain degree. And one of the approach is "Personas Based Testing" where you create personas of various types of users and this mind-map helps you to build a better testing methodology based on the context of your app testing.