There’s a new project in CodePlex, called SharePoint Typemock Wrapper. It contains wrapper classes for the regular SharePoint classes, that are mock-ready, and can make your tests a breeze. The wrapper uses the Natural Mocks syntax.
Note that SPTypeMock is open-source. It’s another example where open source projects can use Isolator to unit-test their code, making use of the open source license.
Check it out.
You can also click the following link to learn more on Using SharePoint.