i've prototyped an add-on for apache deltaspike which allows to mock cdi-beans manually or with a mocking-framework.
an example for a simple cdi-bean:
an example for a simple manual-mock for the cdi-bean:
an example for a simple mockito-mock for the cdi-bean:
the same is possible in combination with qualifiers as well as with producers and @Typed beans.
the add-on is available here. the repository also contains several tests, which illustrate the supported use-cases. the tests use manual-mocks as well as mockito-mocks. however, you can provide any object as mock which is a subclass of the original implementation.