断言错误 [ERR_ASSERTION]：缺少预期的拒绝错误

如何解决断言错误 [ERR_ASSERTION]：缺少预期的拒绝错误

因此，我正在尝试使用 MochaJS、Sinonjs、rewire、chai 和 assert 为我的代码编写一些单元测试。我收到以下错误：

 1) async function addOneRoom(db,newRoom)
   should reject error when the maximum room number has been reached:
 AssertionError [ERR_ASSERTION]: Missing expected rejection (Error).
  at async Context.<anonymous> (test\test.js:33:9).

所以我正在测试的功能如下：

async function addOneRoom(db,newRoom) {
const roomNumber = await createRoomNumber(db,newRoom.floor);

if (roomNumber !== 0) {
    newRoom.roomNumber = roomNumber;
    const result = await db.rooms.insertOne(newRoom);
    return newRoom
} else return new Error("No room can be added on this floor. The maximum numar of rooms has been reached")}

我的单元测试是：

describe("async function addOneRoom(db,newRoom)",() => {
const addOneRoom = rewired.__get__("addOneRoom")
const sandBox = sinon.createSandBox()

it("should reject error when the maximum room number has been reached",async () => {
    const newRoom = {
        floor: 1,sqm: 20,capacity: 5,features: {
            videoProjector: 1,stage: 2
        }
    }

    const insertOne = sandBox.stub().returns()
    const mockedCreateRoomNumber = sandBox.stub().resolves(0)

    const db = {
        rooms: { insertOne }
    }

    const stubbedRoomNumber = rewired.__set__({ createRoomNumber: mockedCreateRoomNumber })
    await assert.rejects(addOneRoom(db,newRoom),new Error("No room can be added on this floor. The maximum numar of rooms has been reached"))

    // sandBox.assert.calledOnceWithExactly(stubbedRoomNumber)
    sandBox.assert.calledOnceWithExactly(insertOne,{newRoom})

    const order = [
        // stubbedRoomNumber,insertOne
    ]

    sandBox.assert.callOrder(...order)
    stubbedRoomNumber()
})

我将不胜感激！

解决方法

不要返回错误，抛出它：

throw new Error("No room can be added on this floor. The maximum numar of rooms has been reached")}

返回错误与返回其他任何东西没有区别，并且不会导致承诺拒绝。