类型错误：无法读取未定义的属性（读取“html”）

我正在尝试将 Jest 引入我当前的项目。

然而，在初始设置过程中，我遇到了这个错误，并且无法正常运行。

我该如何解决这个问题？

我目前正在使用 vue-cli 中的 vue2。

● Test suite failed to run

    TypeError: Cannot read properties of undefined (reading 'html')

      at new JSDOMEnvironment (node_modules/jest-environment-jsdom/build/index.js:72:44)
      at async TestScheduler.scheduleTests (node_modules/@jest/core/build/TestScheduler.js:317:13)
      at async runJest (node_modules/@jest/core/build/runJest.js:407:19)
      at async _run10000 (node_modules/@jest/core/build/cli/index.js:338:7)
      at async runCLI (node_modules/@jest/core/build/cli/index.js:190:3)

这是我的测试代码。

import SettlementProcessing from "@/views/calculate/SettlementProcessing.vue";
import { shallowMount } from "@vue/test-utils";
import Vuetify from "vuetify";
describe("Settlement Component", () => {
  let vuetify;
  beforeEach(() => {
    vuetify = new Vuetify();
  });
  it("정산 처리 타이틀이 나와야 한다.", () => {
    const sc = shallowMount(SettlementProcessing, { vuetify });
    expect(true).toBe(true);
  });
});

这是我的 package.json。

"devDependencies": {
    "@vue/cli-plugin-babel": "~4.5.0",
    "@vue/test-utils": "^2.0.0-rc.21",
    "babel-core": "^7.0.0-bridge.0",
    "babel-jest": "^28.1.0",
    "jest": "^28.1.0",
    "vue-cli-plugin-vuetify": "~2.4.0",
    "vue-jest": "^3.0.7",
  }

这是我的 jest.config.json。

// jest.config.js
module.exports = {
  preset: "@vue/cli-plugin-unit-jest",
  moduleFileExtensions: [
    "js",
    "json",
    "vue",
  ],
  transform: {
    "^[^.]+.vue$": "vue-jest",
    "^.+\\.js$": "babel-jest",
  },
  moduleNameMapper: {
    "^@/(.*)$": "<rootDir>/src/$1",
  },
  testMatch: [
    "**/__tests__/**/*.[jt]s?(x)",
    "**/?(*.)+(spec|test).[jt]s?(x)",
  ],
  testPathIgnorePatterns: ["/node_modules/", "/dist/"],
  collectCoverage: false,
  collectCoverageFrom: ["**/*.{js,vue}", "!**/node_modules/**"],
};

我该如何解决这个问题？

当我将 React 应用程序更新到 jest 28 时，我遇到了同样的问题。问题是缺少 jest-environment-jsdom 包，该包在 jest 27 中还不是必需的。

See https://jestjs.io/docs/28.x/upgrading-to-jest28 https://jestjs.io/docs/28.x/upgrading-to-jest28