JMockCycle's expecting method of passes an instance of this class to the function passed into expectations. Because JMockExpectations extends org.jmock.Expectations, all of the Expectations methods are available to be invoked on instances of this class, in addition to several overloaded withArg methods defined in this class. These withArg methods simply invoke corresponding with methods on this. Because with is a keyword in Scala, to invoke these directly you must surround them in back ticks, like this:

 oneOf (mockCollaborator).documentAdded(`with`("Document"))
 

By importing the members of the JMockExpectations object passed to a JMockCycle's executing method, you can instead call withArg with no back ticks needed:

 oneOf (mockCollaborator).documentAdded(withArg("Document"))