Java 在junit中运行方法时调用TargetException
我得到了一个NullPointer异常,在调试代码时,我得到了一个InvocationTargetException。我不知道我哪里出错了。有人能帮我修一下吗Java 在junit中运行方法时调用TargetException,java,unit-testing,junit,mockito,hibernate-entitymanager,Java,Unit Testing,Junit,Mockito,Hibernate Entitymanager,我得到了一个NullPointer异常,在调试代码时,我得到了一个InvocationTargetException。我不知道我哪里出错了。有人能帮我修一下吗 @Inject private Log log; @PersistenceContext(name = Configuration.PERSISTENT_CONTEXT) private EntityManager em; public List<Vehicle> getData() { List<
@Inject
private Log log;
@PersistenceContext(name = Configuration.PERSISTENT_CONTEXT)
private EntityManager em;
public List<Vehicle> getData() {
List<Vehicle> resultList = new ArrayList<>();
try {
String sql = "SELECT v FROM Vehicle v JOIN v.car c WHERE c.carType = 'BMW'";
//getting an InvocationTargetException here while debugging as junit
Query query = em.createQuery(sql, Vehicle.class);
resultList = query.getResultList();
if(resultList == null){
log.error("List is empty or null");
return null;
}
} catch (IllegalArgumentException ex) {
log.info(ex.getMessage());
log.trace(ex.getCause());
}
return resultList;
}
这是我的Junit:
@InjectMocks
private FinderManager classUnderTest;
private Query query;
private EntityManager emMock;
@Before
public void setUp(){
emMock = Mockito.mock(EntityManager.class);
query = Mockito.mock(Query.class);
Mockito.mock(Vehicle.class);
}
@Test
public void testMethod(){
List<Vehicle> resultList = new ArrayList<>();
Mockito.when(emMock.createQuery(Mockito.any(String.class)).thenReturn(query);
Mockito.when(query.getResultList()).thenReturn(resultList);
classUnderTest.getData();
}
这么长时间以来,一直在努力寻找解决方案并解决这个问题 这可能是因为您正在模拟createQuery方法,仅使用字符串作为参数,而实际上在方法中,您正在使用字符串和类参数调用createQuery方法。 在测试方法中使用正确的签名模拟方法
其次,您的测试方法中没有断言语句或验证,您到底要测试什么?是的,这是因为createQuery方法中的类参数!不需要它。谢谢如果解决方案对您有效,请接受答案: