title: Mocking a Django Queryset in order to test a function that takes a queryset
body: <p>I have a utility function in my Django project, it takes a queryset, gets some data from it and returns a result. I'd like to write some tests for this function. Is there anyway to 'mock' a QuerySet? I'd like to create an object that doesn't touch the database, and i can provide it with a list of values to use (i.e. some fake rows) and then it'll act just like a queryset, and will allow someone to do field lookups on it/filter/get/all etc.</p>
  
  <p>Does anything like this exist already?</p>