使用 Mockito 测试服务的删除方法

Question

我尝试为我的删除方法进行服务模拟测试。这是我的RestoranServiceImpl.java中的删除方法public void deleteRestoran(Long idRestoran) {        RestoranModel restoran = getRestoranByIdRestoran(idRestoran).get();        if(restoran.getListMenu().size()==0){            restoranDb.delete(restoran);        }else{            UnsupportedOperationException unsupportedOperationException = new UnsupportedOperationException();            throw unsupportedOperationException;        }    }这是我的RestoranDb.javapublic interface RestoranDb extends JpaRepository<RestoranModel,Long> {    Optional<RestoranModel> findByIdRestoran(Long idRestoran);}这是到目前为止我的删除方法@Test    public void whenDleleteValidRestoranItShouldCallRestoranRepositoryDelete() {        RestoranModel newRestoran = new RestoranModel();        newRestoran.setIdRestoran((long) 1);        newRestoran.setNama("mekdi");        newRestoran.setAlamat("pacil");        newRestoran.setNomorTelepon(14045);        restoranService.addRestoran(newRestoran);        verify(restoranDb, times(1)).save(newRestoran);        System.out.println(restoranService.getRestoranList().size());        when(restoranDb.findByIdRestoran((long)1).get()).thenReturn(newRestoran).thenReturn(null);        restoranService.deleteRestoran(newRestoran.getIdRestoran());        verify(restoranDb, times(1)).delete(newRestoran);    }当我尝试运行它时，我收到此错误。java.util.NoSuchElementException: No value present我试图四处寻找解决方案，但找不到适合我的解决方案。

Answer 1

我认为你在这里模拟了错误的方法，你应该模拟RestoranDb.findByIdRestoran方法，而不是Optional.get方法

when(restoranDb.findByIdRestoran((long)1).get()).thenReturn(newRestoran).thenReturn(null);

应该

when(restoranDb.findByIdRestoran((long)1)).thenReturn(Optional.of(newRestoran));