How to inject or replace a @Resource dependency?

Question

I have SomeService that uses a @Resource annotation for EJB TimerService.

@Resource private TimerService timerService;

How can I inject a mock TimerService in place of this TimerService in SomeService?

score 1 · Answer 1 · edited May 23 '17 at 10:29

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If you're using mockito: Mockito can inject annotated fields for you see: @RunWith(MockitoJUnitRunner.class) vs MockitoAnnotations.initMocks(this)

I would suggest instead of using annotations on fields to use a annotated constructor. That way you can make all injected fields final and you will get build failures when dependencies change instead of runtime/test failures/exceptions. And the added bonus is that you can just call the constructor in your tests and inject the mocks that way.

edited May 23 '17 at 10:29

Community

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answered Sep 08 '16 at 08:54

Bob Brinks

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Can you provide an example of what you are describing with an annotated constructor? – user840930 Sep 09 '16 at 12:15
@user840930 https://docs.jboss.org/weld/reference/1.1.0.Final/en-US/html/injection.html – Bob Brinks Sep 11 '16 at 07:36

How to inject or replace a @Resource dependency?

1 Answers1