Monkey see, monkey do; occasionally monkey learn.

This may (no guarantees) turn into a series of posts on how to refactor your code for testing using simple examples. This particular example came from a request to add an "Exclude Lines from Coverage" feature to OpenCover [https://github.com/OpenCover/opencover]. Now there are many ways this could be achieved, none of which I had any appetite for as they were either too clunky and/or could make OpenCover very slow. I am also not a big fan on excluding anything from code coverage; though OpenCov

I recently posted a response to StackOverflow wrt TDD and Coverage [http://stackoverflow.com/a/26152423/189163]and I thought it would be worth re-posting the response here. The example is simple but hopefully shows how writing the right tests using TDD gives you a better suite of tests for your code than you would probably write if you wrote the tests after the code (which may have been re-factored as you developed). "As the [original] accepted answer has pointed out your actual scenario reduce