### Question:
AddFilterUsecase extends Usecase { public void setFilter(FilterEntity filter) { mFilter = filter; } @Inject protected  AddFilterUsecase(FilterRepository filterRepository, ThreadExecutor threadExecutor,
            PostExecutionThread postExecutionThread); void setFilter(FilterEntity filter);  }### Answer:
@Test(expected = RuntimeException.class) public void shouldThrowRuntimeException() { assertNotNull(mAddFilterUsecase); mAddFilterUsecase.setFilter(null); mAddFilterUsecase.execute(null); }