我试图在我的 DAO 类中模拟一个休息模板,但 Mockito 抛出奇怪的错误,说它无法模拟。
尝试涵盖我的 Spring 启动应用程序版本 2.x 的单元测试用例。我几乎已经尝试了互联网上所有可能的解决方案,例如更新JDK/JRE以进行编译,但是我遇到了以下错误:
org.mockito.exceptions.base.MockitoException:
Mockito cannot mock this class: class org.springframework.web.client.RestTemplate.
Mockito can only mock non-private & non-final classes.
If you're not sure why you're getting this error, please report to the mailing list.
Java : 1.8
JVM vendor name : Oracle Corporation
JVM vendor version : 25.181-b13
JVM name : Java HotSpot(TM) 64-Bit Server VM
JVM version : 1.8.0_181-b13
JVM info : mixed mode
OS name : Windows 10
OS version : 10.0
Underlying exception : java.lang.IllegalArgumentException: Could not create type
at org.mockito.junit.jupiter.MockitoExtension.beforeEach(MockitoExtension.java:115)
....
以下是我的代码:
build.gradle
dependencies {
implementation 'org.springframework.boot:spring-boot-starter'
implementation 'org.springframework.boot:spring-boot-starter-data-rest'
implementation 'org.springframework.retry:spring-retry'
implementation 'org.aspectj:aspectjrt'
implementation 'org.aspectj:aspectjweaver'
implementation 'org.springframework:spring-aop'
testImplementation 'org.springframework.boot:spring-boot-starter-test'
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.2.0'
testCompile 'org.junit.jupiter:junit-jupiter-params:5.2.0'
testRuntime 'org.junit.jupiter:junit-jupiter-engine:5.2.0'
testImplementation 'org.mockito:mockito-core:2.+'
testImplementation 'org.mockito:mockito-junit-jupiter:2.18.3'
}
test {
testLogging.showStandardStreams = true
useJUnitPlatform()
}
我的道.java
@Repository
public class MyDao {
@Value("${app.prop.service.url}")
private String url;
@Autowired
public RestTemplate restTemplate;
public String getSignals() {
System.out.println("url -----------------------> " + url);
return new RetryTemplate().execute(context -> {
ResponseEntity<String> response = restTemplate.getForEntity(url, String.class);
if (response.getStatusCodeValue() == 200) {
System.out.println("Server response -> " + response.getBody());
return response.getBody();
} else {
throw new RuntimeException("server response status: " + response.getStatusCode());
}
}, context -> {
System.out.println("retry count: " + context.getRetryCount());
System.err.println("error -> " + context.getLastThrowable());
return null;
});
}
}
我的道测试.java
@ExtendWith(MockitoExtension.class)
public class MyDaoTest {
@Mock
private RestTemplate restTemplate;
@InjectMocks
private MyDao dao;
@BeforeEach
public void prepare() {
ResponseEntity<String> response = new ResponseEntity<>("{name: myname}", HttpStatus.OK);
Mockito.doReturn(response).when(restTemplate.getForEntity(Mockito.anyString(), String.class));
}
@Test
public void testGetSignals() {
System.out.println("------------------TEST-------------------");
String result = dao.getSignals();
System.out.println("result ------>" + result);
assertEquals("{name: myname}", result);
}
}
BeanConfig for RestTemplate
@Bean
public RestTemplate restTemplate() {
// block of code for SSL config for HTTPS connection
return new RestTemplate();
}
任何建议都会非常有帮助
PS:该应用程序通过gradle命令运行良好
gradlew bootRun
问题仅出在单元测试上
gradlew test
这个问题发生在我身上,因为我无意中运行了 Java 11。 一旦我切换到该项目的标准Java 8,问题就消失了。
所描述的(或从属的(问题的一个原因可能是,因为RestTemplate
既不是"私有的"也不是"最终的"和"被称为可模拟的",所以调用/嘲笑restTemplate.getForEntity()
。在当前版本中,此方法有三种风格/具有重载参数:
-
... getForEntity(String url, Class<T> responseType, Object... uriVariables) ...
-
... getForEntity(String url, Class<T> responseType, Map<String, ?> uriVariables) ...
-
... getForEntity(URI url, Class<T> responseType) ...
中,您似乎使用了第一种风格,因此在不更改它(操作代码(的情况下,我建议将您的测试代码调整为:
...restTemplate.getForEntity(Mockito.anyString(), String.class
/*!!!*/, ArgumentMatchers.<Object>any());
另请参阅:
- Mockito不适用于RestTemplate
- 如何在莫克托中正确匹配变量
好的,我解决了问题。这是mockito-core和mockito-junit-jupiter罐子之间的版本不匹配,这导致了thr问题。
正确的依赖关系是:
testImplementation 'org.junit.jupiter:junit-jupiter-api:5.2.0'
testCompile 'org.junit.jupiter:junit-jupiter-params:5.2.0'
testRuntime 'org.junit.jupiter:junit-jupiter-engine:5.2.0'
testImplementation 'org.mockito:mockito-core:2.18.3'
testImplementation 'org.mockito:mockito-junit-jupiter:2.18.3'
早些时候,它是
testImplementation 'org.mockito:mockito-core:2.+'
Gradle正在选择最新版本的mockito-core jar,因为它被要求选择构建文件中定义的2.x系列中的任何版本。我相信其余的都是不言自明的。
快乐,单元测试!:P