如何模拟未实现接口的默认方法?

Question

我正在动手使用Junit/Mockito/PowerMockito

我有一个接口类

import retrofit2.Call;
import com.learning.model.user.User;
import java.io.IOException;
public interface UserService {
@GET("/serviceUser/{userId}")
Call<User> getUser(@Path("userId") String userId);

default User getUserById(String userId) {
try {
return getUser(userId).execute().body();
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
static UserService getUserService(){
//setup retrofit ...
}
}

在其他服务中:

public class DemoUser {
public void doUserBusiness(String userId) {
User user = UserService.getService().getUserById(userId);
//do business logic here
}
}

那么，在测试doUserBussiness方法时，我如何模拟UserService.getService().getUserById(userId);以返回一个模拟用户?

Answer 1

您可以尝试使用mockStatic():

try (MockedStatic<UserService> serviceMockedStatic = mockStatic(UserService.class)) {
serviceMockedStatic
.when(() -> UserService.getService().getUserById(userId))
.thenReturn(any());
}

更多信息在这里->staticMock