Plan your multicloud attack: Before your development teams write a single line of code destined for multicloud environments, you need to know why you're doing things that way - and that lives in the realm of management.
Episode #242: Eric Matthes: Maybe Don't Start With Unit Tests - The Real Python Podcast
In testing, always starting with unit tests can be a hazard; the decision should depend on the project's type and audience to determine initial testing focus.