我试图测试一个函数，提醒用户，然后关闭后3000.我得到的类仍然存在后，超时功能已被调用.我使用引导警报，我想知道如果我是正确的测试？
测试代码：

setTimeout(function () {
        let messages = document.getElementById("msg");
        let alert = new bootstrap.Alert(messages);
        alert.close();
    }, 3000);

字符串
script.test.js:

jest.useFakeTimers();
describe("Timer alerts and then closes after 3000", () => {

    beforeAll(() => {
        let fs = require("fs");
        let fileContents = fs.readFileSync("templates/base.html", "utf-8");
        document.open();
        document.write(fileContents);
        document.close();
    });

    test('closes the alert after 3 second via advanceTimersByTime', () => {
        const element = document.getElementById("msg");
        expect(element).not.toBeNull();

        require('../script');

        expect(document.querySelector('.alert')).toBeTruthy();
        jest.runAllTimers();
        jest.advanceTimersByTime(3000);
        expect(document.querySelector('.alert')).toBeNull();

    });
});

型