根据以下代码写一个单测： private List<String> getUserIdsByCorpId(String corpId, List<Long> paramDeptIds) { Long orgId = CorpIdUtils.corpIdToOrgId(corpId); //默认查询所有部门 List<Long> deptIds = Lists.newArrayList(-1L); if (CollectionUtils.isNotEmpty(paramDeptIds)) { deptIds = paramDeptIds; } return orgDeptServiceClient.getDeptsMemberStaffIds(orgId, deptIds, true); }

下面是一个使用JUnit编写的单元测试示例，测试`getUserIdsByCorpId`方法：

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import static org.mockito.Mockito.*;

public class YourTestClass {

    @Mock
    private OrgDeptServiceClient orgDeptServiceClient;

    public YourTestClass() {
        MockitoAnnotations.openMocks(this);
    }

    @Test
    public void testGetUserIdsByCorpId() {
        // 设置测试数据
        String corpId = "your-corp-id";
        List<Long> paramDeptIds = Arrays.asList(1L, 2L, 3L);

        List<Long> expectedDeptIds = new ArrayList<>(paramDeptIds);
        expectedDeptIds.add(-1L);

        List<String> expectedUserIds = Arrays.asList("user1", "user2", "user3");

        // 模拟 orgDeptServiceClient.getDeptsMemberStaffIds 方法返回的结果
        when(orgDeptServiceClient.getDeptsMemberStaffIds(anyLong(), anyList(), anyBoolean()))
                .thenReturn(expectedUserIds);

        // 调用被测试的方法
        YourClass yourClass = new YourClass(orgDeptServiceClient);
        List<String> actualUserIds = yourClass.getUserIdsByCorpId(corpId, paramDeptIds);

        // 验证结果
        Assertions.assertEquals(expectedUserIds, actualUserIds);
        verify(orgDeptServiceClient, times(1)).getDeptsMemberStaffIds(anyLong(), eq(expectedDeptIds), eq(true));
    }
}

在这个示例中，我们使用了 Mockito 框架来模拟`OrgDeptServiceClient`类的行为，以便在单元测试中使用。通过`when()`方法来模拟`getDeptsMemberStaffIds()`方法的返回结果，然后调用被测试的`getUserIdsByCorpId()`方法，并验证最终的结果是否符合预期。