https://waitbutwhy.com/2014/12/what-makes-you-you.html

3 theories: body, brain, data

tests
Teletransporter experiment
Split Brain Experiment
Cell Replacement Test
Body Scattering Test
Continuity

Sources
Derek Parfit: Reasons and Persons
Yale professor Shelly Kagan’s fascinating philosophy course on death—the lectures are all watchable online for free.


Other Sources:
David Hume: Hume on Identity Over Time and Persons
Derek Parfit: We Are Not Human Beings
Peter Van Inwagen: Materialism and the Psychological-Continuity Account of Personal Identity
Bernard Williams: The Self and the Future
John Locke: An Essay Concerning Human Understanding (Chapter: Of Identity and Diversity)
Douglas Hofstadter: Gödel, Escher, Bach
Patrick Bailey: Concerning Theories of Personal Identity