相关疑难解决方法(0)

我正在尝试为我的简单 React 应用程序编写测试，该应用程序使用 API 等为狗收容所创建 UI。我导入了如下所示的模块并运行以下命令

npm install jest-dom react-testing-library --save-dev

但是，我得到了 toBeInTheDocument(); 红色下划线的方法和错误消息

"Property 'toBeInTheDocument' does not exist on type 'Matchers<any>'."

import "react-testing-library/cleanup-after-each";
import "jest-dom/extend-expect";

import * as React from "react";
import PetCard from "./PetCard";
import Pet from "./Pet";
import { render } from "react-testing-library";

const petMock = {
  id: "225c5957d7f450baec75a67ede427e9",
  name: "Fido",
  status: "available",
  kind: "dog",
  breed: "Labrador",
} as Pet;

describe("PetCard", () => {
  it("should render the name", () => {
    const { getByText } = render(<PetCard …

我想在我的开玩笑测试代码中摆脱全局变量.具体来说describe,it和expect

describe('Welcome (Snapshot)', () => {
  it('Welcome renders hello world', () => {
     ...
  });
});

所以我尝试添加

import {describe,it} from 'jest';

和

import jest from 'jest';

jest.describe( ... 
  jest.it( ... 

和其他变化..

但没有运气.

我应该如何使它工作？