IntelliJ IDEA快速自动生成Junit测试类

青旅半醒 2022-03-31 04:26 482阅读 0赞

### 前言 ###

> 之前在写业务逻辑的时候，都很少有写单元测试。因公司项目用的分布式架构，将整个系统抽成了很多微服务。测试一个接口，需要启动好几个服务，才能进行测试。并且有时候，我们只是改了一点代码，并不需要全部启动，太耗时，这个时候，就可以编写单元测试，简单的测试一下我们的代码。  
> 单元测试（模块测试）是开发者编写的一小段代码，用于检验被测代码的一个很小的、很明确的功能是否正确。

### 自动生成 ###

两种快捷键：

1.在要生成测试类的类里面，按`ctrl+shift+t` –> `create new test`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyNjM4Mzk5_size_16_color_FFFFFF_t_70]

2.将鼠标光标放到要生成测试类的类名或者方法名上面，按`ctrl + enter` –> `create test`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyNjM4Mzk5_size_16_color_FFFFFF_t_70 1]

点击创建create test:弹出下面选择框  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyNjM4Mzk5_size_16_color_FFFFFF_t_70 2]

### Test ###

/** * @author Jiangcheng Xiang */
    @RunWith(SpringJUnit4ClassRunner.class)
    @SpringApplicationConfiguration(classes = FlightApiApplication.class)
    public class WhiteScreenSearchTransformerTest { 
    
        private static final Logger LOGGER = LoggerFactory.getLogger(WhiteScreenSearchTransformerTest.class);
    
        @Autowired
        private WhiteScreenSearchTransformer searchTransformer;
    
        @Test
        public void transformRequest() { 
            LOGGER.info("测试whiteScreen request transformer");
            WhiteScreenSearchRequest request = new WhiteScreenSearchRequest();
            List<WhiteScreenItinerary> itinerarys = Arrays.asList(new WhiteScreenItinerary("CTU", "TYO", "20181214"),
                    new WhiteScreenItinerary("TYO", "TPE", "20181216"),
                    new WhiteScreenItinerary("TPE", "HKG", "201812117")
            );
            request.setItineraries(itinerarys);
    
            ActionRelated actionRelated = searchTransformer.transformRequest(request);
    
            assertTrue(actionRelated instanceof SearchFlightRequest);
            SearchFlightRequest searchFlightRequest = (SearchFlightRequest) actionRelated;
    
            assertEquals(1, searchFlightRequest.getAdultNumber());
    
            assertFalse(searchFlightRequest.getTrips().isEmpty());
            assertTrue(searchFlightRequest.getTrips().size() == 3);
    
        }
    }

### 注意 ###

如果启动项目时，单元测试走不通，可以忽略掉tests mode。如下图  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyNjM4Mzk5_size_16_color_FFFFFF_t_70 3]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyNjM4Mzk5_size_16_color_FFFFFF_t_70]: /images/20220331/48a1b0a1edbc424793b027db869523d8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyNjM4Mzk5_size_16_color_FFFFFF_t_70 1]: /images/20220331/17a88f7f36dc4a6a9f8cf3dd4d7204f6.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyNjM4Mzk5_size_16_color_FFFFFF_t_70 2]: /images/20220331/74aa5739e6384b19b121a859e0f01c6f.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzIyNjM4Mzk5_size_16_color_FFFFFF_t_70 3]: /images/20220331/7c373601e85b4575a5ec875620fff01a.png