While working on my startup as a solo-founder I used to follow a TDD approach supported mostly by Integration tests. I mostly focused on the user happy paths with limited coverage outside the Integration tests.
The goal is to have the major functionality of the platform tested automatically so we can be confident that new features don’t introduce new bugs.
Precisely what I do with personal side projects, and for greenfield development at the company at which I’m a cofounder (and which has been around for over a decade now).
The goal is to have the major functionality of the platform tested automatically so we can be confident that new features don’t introduce new bugs.