title: Unit testing an application that talks to microsoft word via OpenXML
body: <p>I am modifying an application that does a lot of 'talking' to Microsoft Word. Right now, COM interop is used but I need to change it to Open XML. I would like to introduce unit tests for this but I am not sure how to do this. </p>
  
  <p>This is one of the operations for example: A template word document contains some bookmarks. The application fills up the bookmarks with some dynamic data. Can I check if this executes correctly? </p>