Mock a function called by other function which has been already mocked

Question

I am trying to mock static function(getBatchId() and sendPost()) for following code :

public void doPost(){      
String batchId = Utility.getBatchId();
                    Post post = new Post(batchId, userId, message);
                    String postJson = Utility.toJson(post);
                          Chat.sendPost(url,postJson)
}

Unit testcase code for above method :

 mockStatic(Utility.class);
        when(Utility.getBatchId()).thenReturn("demoBatchId1234");

        mockStatic(Chat.class);
        when(Chat.sendPost(url,postJson))
                .thenReturn(CompletableFuture.supplyAsync(() -> HttpResponse.create()));

I am getting following exception at when(Utility.getBatchId()).thenReturn("demoBatchId1234"); while running test case :

org.mockito.exceptions.misusing.MissingMethodInvocationException: when() requires an argument which has to be 'a method call on a mock'. For example: when(mock.getArticles()).thenReturn(articles);

Also, this error might show up because:

you stub either of: final/private/equals()/hashCode() methods. Those methods cannot be stubbed/verified. Mocking methods declared on non-public parent classes is not supported.
inside when() you don't call method on mock but on some other object.

could you provide the whole test class with the imports, and so on... where does the `mockStatic` method comes from? Do you use PowerMockito? In that case, do you use the `PrepareForTest` annotation? See: http://stackoverflow.com/a/21116014/2891426 — Nagy Vilmos, Sep 05 '16 at 09:49

score 0 · Answer 1 · edited Apr 30 '20 at 18:23

0

If you want to mock static methods from different class then you need to prepare all those classes for test using Junit like :

@PrepareForTest({Chat.class,Utility.class})

edited Apr 30 '20 at 18:23

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answered Sep 05 '16 at 10:31

avy

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Mock a function called by other function which has been already mocked

1 Answers1