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我知道这个问题有很多类似的帖子。我试图实现所有这些，但不适用于我。我得到了这个错误java.lang.AssertionError:状态预期：＜200＞但是：＜404＞我不知道问题在哪里，所以我需要帮助，如果有人可以帮助我
我的代码：
控制器类：

package com.globusdigital.patientsmanager.controllers;

import com.globusdigital.patientsmanager.model.Department;
import com.globusdigital.patientsmanager.service.interfaces.DepartmentServices;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/department")
public class DepartmentController {
    private final DepartmentServices departmentServicesImp;

    public DepartmentController(DepartmentServices departmentServicesImp) {
        this.departmentServicesImp = departmentServicesImp;
    }

    @PostMapping("/add")
    public ResponseEntity<Department> addDepartment(@RequestBody Department department) {
        Department newDepartment = departmentServicesImp.addDepartment(department);
        return new ResponseEntity<>(newDepartment, HttpStatus.CREATED);
    }
}

控制器测试类：

package com.globusdigital.patientsmanager.controllers;

import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.mockito.BDDMockito.given;

import org.springframework.test.web.servlet.MockMvc;
import com.globusdigital.patientsmanager.model.Department;
import org.junit.Before;
import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import com.globusdigital.patientsmanager.service.DepartmentServiceImp;
import org.springframework.test.web.servlet.ResultActions;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import org.springframework.test.web.servlet.setup.MockMvcBuilders;
import org.springframework.web.context.WebApplicationContext;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;

@WebMvcTest(DepartmentController.class)

public class DepartmentControllerTest {
    @MockBean
    private DepartmentServiceImp departmentServiceImp;
    @Autowired
    private MockMvc mvc;
    @Autowired
    private WebApplicationContext context;
    @Before
    public void setUp() {
        mvc = MockMvcBuilders.webAppContextSetup(context).build();
    }
    @Test
    public void notNullMockMvc() {
        assertNotNull(mvc);
    }
    @Test
    public void addDepartment() throws Exception {
        Department department = new Department();
        department.setDepartmentName("department");
        given(departmentServiceImp.addDepartment(department)).willReturn(department);
        ResultActions result = mvc.perform(MockMvcRequestBuilders.get("/add"));
        result.andExpect(status().isCreated());
    }

}