java - 如何解决 "to create a new mock, the existing mock registration must be deregistered"

Question

尝试模拟静态方法时出现以下异常:

org.mockito.exceptions.base.MockitoException: For de.msggillardon.system.UserContext, static mocking is already registered in the current thread To create a new mock, the existing static mock registration must be deregistered

对于以下代码:

 @ExtendWith(MockitoExtension.class)
// @PrepareForTest(UserContext.class)
public class KonfigurationCopyServiceTest {

  public static final String CONFIGURATION_NAME = "Standard-Konfiguration";

  @Mock
  public TriggeringKonfigurationService triggeringKonfigurationService;
  @Mock
  public ReportKonfigService reportConfigurationService;
  @Mock
  public BuchungsschemaService buchungsschemaService;

  public KonfigurationCopyService copyService;

  @BeforeEach
  public void init() {
    Mockito.mockStatic(UserContext.class);
    Mockito.when(UserContext.getUsername()).thenReturn("superuser");

    copyService = new KonfigurationCopyService(triggeringKonfigurationService,
        reportConfigurationService, buchungsschemaService);
  }

有人可以帮忙吗？
谢谢!
编辑:UserContext.java

package de.msggillardon.system;

/**
 * This class contains the username and IP-address of the logged in user. It is initialized for each
 * session.
 *
 * @author wildp
 */
public class UserContext {

  private static final ThreadLocal<UserContext> userContext = new ThreadLocal<>();

  private final String username;

  private final String clientIPAddress;

  /**
   * Constructor.
   *
   * @param username        Username of the user who is logged in
   * @param clientIPAddress IP Address of the user who is logged in
   */
  public UserContext(String username, String clientIPAddress) {
    this.username = username;
    this.clientIPAddress = clientIPAddress;
  }

  /**
   * Initializes the threadLocal
   *
   * @param userContext
   */
  public static void initialize(UserContext userContext) {
    UserContext.userContext.set(userContext);
  }

  /**
   * Removes the current thread's value for this thread-local variable.
   */
  public static void remove() {
    userContext.remove();
  }

  /**
   * Returns the username of the current thread.
   *
   * @return
   */
  public static String getUsername() {
    return userContext.get().username;
  }

  /**
   * Returns the IP address of the client of the current thread.
   *
   * @return
   */
  public static String getClientIPAddress() {
    return userContext.get().clientIPAddress;
  }

  public static UserContext getThreadLocalUserContext(){
    return userContext.get();
  }
}

新编辑:
我再次编辑了我的代码，以便您现在可以看到，我正在使用 @ExtendWith(MockitoExtension.lass) 进行 Mock。
我还在网上找到了以下提示:https://javadoc.io/static/org.mockito/mockito-core/3.4.3/org/mockito/MockedStatic.html
所以看起来我必须做一个 MockedStatic.close();也许作为@AfterEach
但是当我尝试时它给了我异常

Cannot make a static reference to the non-static method close() from the type ScopedMock

还是行不通 :(

Answer 1

因此，当我使用 Junit 5 时，我无法使用 @Before 注释，所以我用 @BeforeAll 替换了 @BeforeEach。
所以我做了如下:

步骤:导入

import static org.junit.jupiter.api.TestInstance.Lifecycle.PER_CLASS;

步骤:添加 @TestInstance(PER_CLASS) 注释(在您的类(class)之前)

步骤:@BeforeAll 而不是 @BeforeEach

那解决了我的问题。