Vue Jest 测试问题：TypeError：超级表达式必须为空或函数，而不是未定义

问题描述

我遇到了 TypeError 问题：超级表达式必须为 null 或函数，而不是未定义

同时更新 babel 和 Bebel-jest 包。但确实解决了。

vue 版本 - 2.6.11

 import BaseAPI from '../BaseAPI'
 
class LanguageAPI extends BaseAPI {  // <-- issue
   _resource ='reference'
   _parentResources =['localization']
}

jest-conf.js

module.exports = {
  rootDir: path.resolve(__dirname,'../../'),moduleFileExtensions: [
    'js','json','vue'
  ],moduleNameMapper: {
    '^@/(.*)$': '<rootDir>/src/$1'
  },transform: {
    '^.+\\.js$': '<rootDir>/node_modules/babel-jest','.*\\.(vue)$': '<rootDir>/node_modules/vue-jest'
  },snapshotSerializers: ['<rootDir>/node_modules/jest-serializer-vue'],setupFiles: ['<rootDir>/test/unit/setup'],testURL: 'http://localhost',testEnvironment: 'node'
}

package.json

"devDependencies": {
    "@babel/preset-env": "^7.13.5","@vue/cli-plugin-pwa": "^4.3.1","babel-core": "^6.22.1","babel-eslint": "^8.2.1","babel-helper-vue-jsx-merge-props": "^2.0.3","babel-jest": "^21.2.0","babel-loader": "^7.1.1","babel-plugin-dynamic-import-node": "^1.2.0","babel-plugin-syntax-jsx": "^6.18.0","babel-plugin-transform-class-properties": "^6.24.1","babel-plugin-transform-es2015-modules-commonjs": "^6.26.0","babel-plugin-transform-runtime": "^6.22.0","babel-plugin-transform-vue-jsx": "^3.5.0","babel-preset-env": "^1.3.2","babel-preset-es2015": "^6.24.1","babel-preset-stage-2": "^6.22.0","jest": "^22.0.4","jest-serializer-vue": "^0.3.0",}

解决方法

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