[nobodyandproud]

I don’t know if this is pure or orthodox but: Start with one or two high-level interfaces that should meet the functional requirements.

It defines the information you need to send in and/or receive.

Non functional. Then capture some basic behavior of one of the methods/properties in the tests, then implement the solution. Then start capturing edge-cases the same way.

If you’re asking yourself “how” or “should” I test this, then you’re doing great.

Apply SOLID principles to separate meaningful concerns into separate classes; and iterate there.

Take my viewpoint with a large grain of salt.