How to Use Rhino Mocks/Mocks, Dynamic Mocks, Partial Mocks

The difference between these three types of Rhino Mocks mocking solutions has always been a little confusing to me. So, here's my best shot at some concise definitions:

  • A normal mock object will throw an exception when a method, which has no explicit expectation defined, is called on the mock instance.
  • A dynamic mock, instead of throwing an exception, will return null or 0 for any unexpected method calls.
  • A partial mock, like a dynamic mock, will not throw an exception if a method is called when there is no expectation defined for the method; but, instead of returning 0 or null, a partial mock will call the actual implementation method (i.e., not the mock) on the object and return that value. This lets you selectively mock specific methods on an object.
Last modified on 4 November 2009, at 10:00