title: Getting started with automated integration/unit testing in an existing code base
body: <p>Background: We have been handed over a very large codebase (1.4 million lines) that is primarily in C#. The application consists primarily of asp.net 2.0 style asmx web services accessing data in a SQL server 2008 database and also in various XML files. There are no existing automated tests in place. We have an automated nightly build in place (CC.NET).</p>
  
  <p>We want to introduce some level of automated testing, but refactoring in granular level unit tests for this amount of code seems unlikely. Our first thought is to find a way to construct automated tests that simply call each web service with a given set of parameters to give us some level of code coverage. Seemed like the quickest way to get the highest amount of code coverage with some automated tests. Is this even called unit testing or would this be considered something else?</p>
  
  <p>How would I go about isolating the data stores to get consistent test results? Would any test tools work better for this approach than others? xUnit? MS tests? NUnit? </p>
  
  <p>Any suggestions to get us started in the right direction would be greatly appreciated. Thanks</p>