It has taken a while, but it is finally ready: “Everything You Wanted to Know About Rust Unit Testing (and then some more)” https://bit.ly/rust-unit-test which is aimed at people with some Rust knowledge, but no prior knowledge on testing and covers most of the basic unit testing in Rust. If you believe that is interesting and relevant to you, please like, because I have two other pieces that I would like to create around this content: Test doubles and TDD.
RTs and feedback are much appreciated.