The testing strategy by Domenico Musto

The testing strategy

What's the difference between unit tests, functional tests and end to end tests ? Which ones do I have to use and when ?
Let's try to understand how we can give a value to the automated tests for "non-developers" and how we can rely on them.
What's the relationship between a QA engineer and automation testing ? Are the tests telling the truth about the actual state of the system ? Let's talk about how automation testing can influence and improve the software development cycle.