java - Spring:未能捕获抛出的异常

Question

我有以下负面测试代码(需要失败并抛出异常):

@Test
public void testInventoryControllerGetNonExistingRegion() {

    final String name = "ME_2";
    RegionConfiguration refRegionConfiguration = prepareReferenceObject(name);

    try(
        inventoryRegionController.get(null,name);
    } catch (EntityDoesNotExistException e){

        //report something...
    }
}

测试调用以下方法 get() 并应该抛出 EntityDoesNotExistException 对象。

@ApiOperation(value = "Get a region")
@RequestMapping(value = "regions/{" + REGION + "}", method = RequestMethod.GET)
public RegionConfiguration get(@RequestHeader(value = AUTHORIZATION_HEADER, defaultValue = "Bearer {{JWT}}") String authorization,
                               @PathVariable(REGION) String regionName) throws EntityDoesNotExistException {

    InventoryRegionEntity inventoryRegionEntity = null;
    inventoryRegionEntity = RegionInventoryService.find(regionName);

    if(null != inventoryRegionEntity)
        return RegionConfigurationMapper.mapInventoryRegionEntity(inventoryRegionEntity);
    else
        throw new EntityDoesNotExistException(InventoryRegionEntity.class, regionName);
}

get() 方法确实抛出所需的异常(我有一个断点并经过验证)!但我的测试从未发现它。那是因为我得到的是

HttpServerErrorException: 500 null

而这个异常确实是被catch子句捕获的。为什么会出现这种情况？

谢谢!

Answer 1

问题是 Spring 为你做了一些艰苦的工作。在这种特殊情况下，您的异常将被封装为 HTTP 错误，因为 REST 只是一种方法。由于您没有任何有关异常映射的配置，服务器会将其转换为 HTTP 500 - 服务器错误。我认为您进行测试的最佳方法是

@Test
public void testInventoryControllerGetNonExistingRegion() {
    final String name = "ME_2";
    RegionConfiguration refRegionConfiguration = prepareReferenceObject(name);

    try(
        inventoryRegionController.get(null,name);
        Assert.fail(); // don't forget to fail your test in no exception thrown
    } catch (HttpServerErrorException e){
        Assert.notNull(e);
        Assert.assertTrue(e.getCause() instanceof EntityDoesNotExistException);
    }
}

希望对你有帮助!