The first step in creating mocks should be dependency identification. The goal of unit testing should be to have clean code and tests that run as quickly as possible with good coverage. You should identify dependencies that can slow down your tests. These are candidates for mocking, for example, a web service or database call.
The approach for creating mock objects can vary based on the type of dependencies being mocked. However, the concepts of mocking can follow the basic concepts that mock objects should return specific predefined values when the methods are invoked. There should be an appropriate validation mechanism in place to ensure the methods of the mock were called and the mock object can throw an exception if configured ...
