[英]Null Page object in Spring Boot REST API unit test execution
I have the following REST API controller class.我有以下 REST API controller ZA2F2ED4F8EBC2CBB4C21A29DC40AB61D。
The endpoint retrieves a paged list of customers.端点检索客户的分页列表。
@RestController
public class CustomerController {
@Autowired
private CustomerRepository customerRepository;
public void setCustomerRepositoryMock(CustomerRepository mockedCustomerRepository) {
this.customerRepository = mockedCustomerRepository;
}
@GetMapping(value="/customers", produces = "application/json")
public ResponseEntity<Page<Customer>> customersList(
@RequestParam(value="pageNumber") int pageNumber,
@RequestParam(value="pageSize") int pageSize){
Pageable customersPageable = PageRequest.of(pageNumber, pageSize);
Page<Customer> customersList = customerRepository.findAll(customersPageable);
return new ResponseEntity<Page<Customer>>(customersList, HttpStatus.OK);
}
}
Now I want to create a mocked unit test for that method.现在我想为该方法创建一个模拟单元测试。
This is what I have.这就是我所拥有的。
public class CustomerControllerTest {
private CustomerRepository mockedCustomerRepository;
private CustomerController customerController;
private Customer customer;
private Page<Customer> customersList;
Pageable customersPageable;
@BeforeEach
void setup() {
customer = new Customer();
customer.setName("Pete");
customer.setAge(35);
customer.setEmail("pete@test.com");
List<Customer> customersListTest = new ArrayList<Customer>();
customersListTest.add(customer);
customersList = new PageImpl<>(customersListTest);
mockedCustomerRepository = mock(CustomerRepository.class);
customerController = new CustomerController();
customerController.setCustomerRepositoryMock(mockedCustomerRepository);
}
@Test
void testListCustomers() {
when(mockedCustomerRepository.findAll(customersPageable)).thenReturn(customersList);
ResponseEntity<Page<Customer>> respPageCustomers = customerController.customersList(0, 3);
assertTrue(respPageCustomers.getBody() != null);
}
}
The problem is that when the following line is executed (in the API method), CustomerList is null.问题是当执行以下行时(在API方法中),CustomerList是null。
Page<Customer> customersList = customerRepository.findAll(customersPageable);
But it should have content, because the content was added in the setup method of the test class and then in the following line of the test method.但它应该有内容,因为该内容是在测试class的设置方法中添加的,然后在测试方法的以下行中。
when(mockedCustomerRepository.findAll(customersPageable)).thenReturn(customersList);
Replace代替
when(mockedCustomerRepository.findAll(customersPageable)).thenReturn(customersList);
with和
when(mockedCustomerRepository.findAll(any(Pageable.class))).thenReturn(customersList);
What you currently have - is that mocked repository will return result only when it receives exact customersPageable (which is null).您目前拥有的是 - 模拟存储库仅在收到确切的 customersPageable (为空)时才会返回结果。
Using any() will return expected result if any object of mentioned class will be passed as parameter如果提到的 class 的任何 object 将作为参数传递,则使用 any() 将返回预期结果
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