title: How to write NUNit test cases when data is read from some database?
body: <p>I want to test a functionality which includes a call to web service to get the data from database. The methods then operate on that data.</p>
  
  <p>Now I want to write NUnit test cases for those methods. How can I assert results or values when I cannot know (at the time of writing cases) which data would be fetched at the run time?</p>