如何编写异常测试

Question

我有这个方法

       public PropertyEntity sendToApprove(Long id) throws CheckedException, NotFoundException {
        PropertyEntity entity = propertyDataService.findById(id, false);
        NotFoundException.check(entity == null, "Property not found.");
        if (entity.getStatus() == PropertyStatus.DRAFT) {
            CheckedException.check(propertyDataService.validateProperty(entity), "Please 
 apply all mandatory fields!");
            entity.setStatus(PropertyStatus.PENDING);
//            not use save method to avoid status changing to draft
            propertyDataService.saveAll(Collections.singletonList(entity));
            propertyDataService.updateMinMaxPriceAndBedBath(entity.getId());
        } else {
            throw new CheckedException("Approve from this status is not supported");
        }
        return entity;
    }

需要编写测试if entity is null then method: send to approve throws exception NotFound. 到目前为止，我是这个测试的新手，我已经完成了这个

@ExtendWith(MockitoExtension.class)
public class PropertyControllerSendToApproveTest {

    private PropertyDataService propertyDataService = Mockito.mock(PropertyDataService.class);

    private PropertyManager propertyManager = Mockito.mock(PropertyManager.class);
    

    @BeforeEach
    public void init() throws CheckedException, NotFoundException {
        Mockito.when(propertyManager.sendToApprove(1L)).thenReturn(null);
    }

    @Test
    @DisplayName("when property is null then not found exception")
    public void testWhenPropertyIsNull() throws CheckedException, NotFoundException {
        when(propertyManager.sendToApprove(anyLong()) == null)
                .thenThrow(NotFoundException.class);
    }
 }

Answer 1

@Test
@DisplayName("when property is null then not found exception")
public void testWhenPropertyIsNull() throws CheckedException, NotFoundException {
    when(propertyManager.sendToApprove(anyLong()) == null)
            .thenThrow(NotFoundException.class);
}

因此在测试用例中会抛出异常，正如您在 thenThrow 方法中提到的那样。您需要添加

@Test(expected = NotFoundException.class)

expected 表示测试用例需要 NotFoundException 而您的测试抛出相同的异常

如何编写异常测试

How to write test for exception

java

testing

unit-testing

mockito