Kirk Evans is a Microsoft Architect for the Azure Center of Excellence.
Introduction to SharePoint and Azure IaaS
Building SharePoint Apps with Windows Azure Platform as a Service
SharePoint Solutions and Architectures on Windows Azure Infrastructure Services
Understanding Authentication and Permissions with Apps for SharePoint and Office
Rather than simply presenting nUnit, this article goes out of its way to illustrate the concepts behind test-driven development. The basic premise:
It also highlights using Mock Objects... a very good read.