英文:
Can I inject mocks into a prototype bean with Autowired constructor?
问题
@Component
@Scope(value = "prototype")
public class Prototype {
private DependantService dependantService;
@Autowired
public Prototype(DependantService dependantService) {
this.dependantService = dependantService;
}
}
@SpringBootTest
public class TestPrototype {
@Autowired
private ApplicationContext ctx;
@Mock
private DependantService dependantService;
@Test
public void testPrototype() {
// How can I inject the mock service?
ctx.getBean(Prototype.class);
}
}
英文:
Is it possible to inject a mock service into a prototype bean using the @Autowired constructor? I realize I could switch to setter injection but I would prefer to use the constructor if possible.
@Component
@Scope(value = "prototype")
public class Prototype {
private DependantService dependantService;
@Autowired
public Prototype(DependantService dependantService) {
this.dependantService = dependantService;
}
}
@SpringBootTest
public class TestPrototype {
@Autowired
private ApplicationContext ctx;
@Mock
private DependantService dependantService;
@Test
public void testPrototype() {
// How can I inject the mock service?
ctx.getBean(Prototype.class);
}
}
答案1
得分: 0
原来 getBean 方法有一个可以接受参数的重载版本。如果可以的话，我会给自己的问题投反对票。
@SpringBootTest
public class TestPrototype {
@Autowired
private ApplicationContext ctx;
@Mock
private DependantService dependantService;
@Test
public void testPrototype() {
Prototype p = ctx.getBean(Prototype.class, dependantService);
// 测试 p
}
}
英文:
Turns out there is an overloaded version of the getBean method that accepts arguments. I would downvote my on question if I could.
@SpringBootTest
public class TestPrototype {
@Autowired
private ApplicationContext ctx;
@Mock
private DependantService dependantService;
@Test
public void testPrototype() {
Prototype p = ctx.getBean(Prototype.class, dependantService);
// Test p
}
}
</details>
# 答案2
**得分**: 0
```java
如果你想加速单元测试，并且进行真正的隔离单元测试，我建议看一下`@InjectMocks` Mockito注解。`@SpringBootTest`会启动相当繁琐的Spring容器。
@Controller
public class MyController {
@Inject
private Logger log;
public void methodThatNeedsTesting() {
log.info("hey this was called");
}
}
@TestInstance(Lifecycle.PER_CLASS)
@ExtendWith({ MockitoExtension.class })
class MyControllerTest {
@Mock
private Logger log;
@InjectMocks
private MyController myController;
@Test
void test_methodThatNeedsTesting() throws Exception {
myController.methodThatNeedsTesting();
// myController在上述代码中不会抛出NPE，因为log字段已经被注入为一个mock对象
}
}
英文:
If you want to speed up your unit tests, [and do true isolated unit testing,] I suggest taking a look at the @InjectMocks mockito annotation. @SpringBootTest fires up the Spring container which is pretty cumbersome.
@Controller
public class MyController {
@Inject
private Logger log;
public methodThatNeedsTesting(){
log.info("hey this was called");
}
}
@TestInstance(Lifecycle.PER_CLASS)
@ExtendWith({ MockitoExtension.class })
class MyControllerTest {
@Mock
private Logger log;
@InjectMocks
private MyController myController;
@Test
void test_methodThatNeedsTesting() throws Exception {
myController.methodThatNeedsTesting();
// myController will not throw an NPE above because the log field has been injected with a mock
}
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