我正在節(jié)點(diǎn)js中用jest進(jìn)行測(cè)試。我的文件索引.jsconst config = helper.config;const _ = helper.module._;它拋出錯(cuò)誤。helper is not defined.這里的幫助者是全局對(duì)象。我的玩笑測(cè)試 jsconst assign = require('xxxxxx/index');const body = {}describe("forgotPassword()", () => {    it("should return true", () => {        //Testing a boolean        expect(assign(body)).toBeTruthy();        //Another way to test a boolean        expect(assign(body)).toEqual(true);    });});有什么辦法嗎？