在另一个方法中模拟一个方法返回null

Question

我有服务方法"customerDetails"获取更多关于客户的信息，并使用其中的另一个方法更改一些字段& getById"当我对customerDetails进行单元测试时，我模拟了另一个方法，但测试失败了，因为模拟返回null。我尝试了一些解决方案，我发现像检查依赖关系的顺序和使用@InjectMocks(我这样做)，但他们不适合我，我不知道问题在哪里。

的代码片段，以更好地理解我

customerService

public class customerService {
public Customer customerDetails(int id) {
CustomerDto customer = getById(id) //here is the problem 
// rest of the code
}
public CustomerDto getById(int id) {
Optional<Customer> customer =
this.customerRepository.findCustomerByIdAndIsDeletedFalse(id); //return null here
if (!customer.isPresent()) {
// code to throw Exception customer not found                
}
//code to retrieve customer 
}
}

customerServiceTest

public class CustomerServiceTest {

@Mock
private CustomerRepository customerRepository;
@InjectMocks
private CustomerService customerService;
@BeforeEach
public void createMocks() {
MockitoAnnotations.initMocks(this);
}
@Test
public void testCustomerDetails() {
CustomerDto actualResponse = DummyCutomer.createDto(); // the actualResponse is filled successfully 

when(customerService.getById(actualResponse.getId()).thenReturn(actualResponse); // but here it send to getById null !! 

//rest of code
}
}                           

Answer 1

您需要模拟customerRepository而不是getById方法例如:

when(customerRepository.findCustomerByIdAndIsDeletedFalse(actualResponse.getId()).thenReturn(Optional.of(WHAT_EVER_YOU_WANT));

在你的情况下，我认为你有两种情况:

findCustomerByIdAndIsDeletedFalse =比;可选的。属于(客户实例)findCustomerByIdAndIsDeletedFalse =比;Optional.empty ()