Using TDD: “top down” vs. “bottom up”

Question

Since I\'m a TDD newbie, I\'m currently developing a tiny C# console application in order to practice (because practice makes perfect, right?). I started by making a simple sket

Answer 1

There was an interesting piece in MSDN magazine of December, which describes "how the BDD cycle wraps the traditional Test-Driven Development (TDD) cycle with feature-level tests that drive unit-level implementation". The details may be too technology specific, but the ideas and process outline sound relevant to your question.