Mocking classes with JMock

Normally, you'll get the following exception when you try to mock a class with jMock:

java.lang.IllegalArgumentException:
  com.javaeenotes.YourClass is not an interface.

The solution is to use the ClassImposteriser when instantiating the Mockery class.

context = new Mockery() {
  {
    setImposteriser(ClassImposteriser.INSTANCE);
  }
};

Now you can mock any class, just as interfaces. The complete instructions can be found on this web page.