I have a bunch of classes that all implement an Interface and one of the parameters is a StreamWriter.
I need to check the contents of the StreamWriter.
I am
In that case you need to mock the test case. You can use frameworks likes rhino mocks. That advantage of mocking framework is, you can verify the contents of the objects, but you don't have to hit server or occupy server resources.
This link will provide you the basic examples: http://www.codeproject.com/Articles/10719/Introducing-Rhino-Mocks