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I am using ExecutorCompletionService and below method calls from that 

Future<List<Student>> studentDetails = taskCompletionService.take();
Lis<Student> details =studentDetails.get()

Now am writing Junit and Mockito and I want to mock above two calls. How can I achieve that?

halfer
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Bravo
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1 Answers1

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If you simply want to stub for the take method of a mocked taskCompletionService then you could do something like this:

List<Student> studentDetails = Arrays.asList(fakeStudentDetail); 
when(taskCompletionService.take())
    .thenReturn(CompletableFuture.completedFuture(studentDetails));
David Rawson
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  • This must be accepted as the answer. It helped me resolve my issue. Thanks David! – Raj Aug 28 '20 at 13:21