用於Spring Cache Manager的Junit

Question

我在應用程序中使用Spring緩存層，在編寫單元測試以使用Mockito測試Spring緩存層時遇到了一個問題。

請針對我的問題參考以下代碼：

服務層：

    public CustomerServiceImpl implements CustomerService {
    @Autowired
    private CacheManager cacheManager;

    @Autowired
    private CustomerRepository customerRepository;//Repository is simple JPA repository interface which contains findByCustomerName()

    @Override
    @CachePut(value = "#customer", key = "#customer.customerName")
    public Customer insertOrUpdate(Customer customer) {
        return customerRepository.save(customer);
    }

    @Cacheable(value="customersCache", key = "#customerName")
    public Customer findByCustomerName(String customerName) {
        Customer customer = customerRepository.findByCustomerName(customerName);
        return customer;
    }
}

用於服務層的JUnit測試代碼：

@RunWith(PowerMockRunner.class)
@PrepareForTest(CustomerServiceImplTest.class)
public class CustomerServiceImplTest {

    @Spy
    CacheManager cacheManager = new ConcurrentMapCacheManager("customersCache");

    @Mock
    CustomerRepository CustomerRepository;

    @InjectMocks
    CustomerServiceImpl customerServiceImpl = new CustomerServiceImpl();

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void testCacheForFindByCustomerName() {
        Customer customer1 = new Customer();
        customer1.setId("1");
        customer1.setName("John");
        Customer customer2 = new Customer();
        customer2.setId("2");
        customer2.setName("Sara");

        //this should save to cache   
        Mockito.when(CustomerRepository.save(customer1))
        .thenReturn(customer1);
        customerServiceImpl.insertOrUpdate(customer1);

        //Now it should retreive from cache, but not able to
      Mockito.when(CustomerRepository.findByCustomerName(Mockito.any(String.class)))
                .thenReturn(customer1, customer2);

        Customer result = customerServiceImpl.findByCustomerName("John");
        assertThat(result, is(customer1));

        result = customerServiceImpl.findByCustomerName("John");
        assertThat(result, is(customer1));
    }
}

例外：

我得到一個“ java.lang.AssertionError: ”，因為緩存層不起作用，並且調用已傳遞給存儲庫對象（兩次），該對象已返回上面的“ customer2”模擬對象，即，存儲庫方法已被調用兩次通過服務層獲取相同的密鑰。

另外，請注意，我正在使用“ Mockito”框架進行測試。

我已經嘗試過在Spring緩存上使用google進行單元測試，並且還引用了以下URL，該URL幾乎使用相同的概念，但不適用於我的上述代碼。

如何在Spring數據存儲庫上測試Spring的聲明式緩存支持？

您能幫忙解決以上例外情況嗎？

Answer 1

Spring Cache Manager依靠Spring管理應用程序。 使用PowerMockRunner無法獲得它，您需要使用SpringJUnit4Runner 。 您仍然可以通過編程方式使用PowerMock或Mockito，但不能作為Runner使用。

通常，您會將單元測試轉換為Spring風格的集成測試，如下所示：

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
public class SpringTest {

    @Configuration
    @EnableCaching
    static class SpringConfig{
        @Bean
        public CustomerService customerService(){
            return new CustomerServiceImpl(customerRepository());
        }
        @Bean
        public CustomerRepository customerRepository(){
            return Mockito.mock(CustomerRepository.class);
        }
    }

    @Autowired
    CustomerService customerService; // this will contain a proper managed cache

    @Autowired
    CustomerRepository customerRepository; // this is a mockito mock you can fine-tune
}