类型错误：roomsRepo.addOneRoom 不是函数

如何解决类型错误：roomsRepo.addOneRoom 不是函数

所以我正在使用 MochaJS、Sinonjs、Chai、assert 和 rewire 对我的应用程序进行单元测试。我收到以下错误。我正在尝试测试在 POST 方法中作为参数传递的 POST 方法的处理程序。我认为我没有正确地存根和模拟。

 TypeError: roomsRepo.addOneRoom is not a function
  at D:\Work\RestAPI\controllers\roomsController.js:10:29
  at async Context.<anonymous> (test\testRoomController.js:106:24)

我正在测试的代码是这样的：

function createRoomHandler (db) {
return  async (request,reply) => {
    try {
        let newRoom = await request.body;
        await roomsRepo.addOneRoom(db,newRoom);
        return newRoom
    } catch (error) { throw error }
};

}

在post方法中作为参数传递的函数：

    fastify.post('/rooms',roomOpts.addRoomOpts,createRoomHandler(db));

我的单元测试代码如下：

describe("POST /rooms request handler unit tests",() => {
const createRoomHandler = rewired.__get__("createRoomHandler")
const sandBox = sinon.createSandBox();

it("should delete a room and return its number",async () => {
    const req = {
        res: {
            "statusCode": 200,"headers": {
                "content-type": "application/json"
            }
        },body: {
            "status": "success",data: {
                "floor": 1,"sqm": 20,"capacity": 5,"features": {
                    "videoProjector": 1,"stage": 2
                }
            }
        }
    }
    const res = {
        "data": {
            "floor": 1,"features": {
                "videoProjector": 1,"stage": 2
            }
        }

    }

    const insertOne = sandBox.stub().returns()

    const db = {
        rooms: { insertOne }
    }

    const mockedAddOneRoom = sandBox.stub().resolves()

    const roomsRepo = {mockedAddOneRoom}

    const stubbedAddOneRoom = rewired.__set__({ roomsRepo: roomsRepo })

    const handler = createRoomHandler(db);

    const result = await handler(req.body.data,res);

    sandBox.assert.calledOnceWithExactly(mockedAddOneRoom,db,req.body.data)

    const order = [
        mockedAddOneRoom
    ]

    sandBox.assert.callOrder(...order)

    expect(result).be.equal(res.data)
    stubbedAddOneRoom()
})

})