jest.config.js配置文件

const path = require('path')

// 添加  verbose: true, testURL: 'http://localhost/'

module.exports = {
  verbose: true,
  testURL: 'http://localhost/',
  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'
  },
  testPathIgnorePatterns: [
    '<rootDir>/test/e2e'
  ],
  snapshotSerializers: ['<rootDir>/node_modules/jest-serializer-vue'],
  setupFiles: ['<rootDir>/test/unit/setup'],
  // mapCoverage: true, 此属性已经删除
  coverageDirectory: '<rootDir>/test/unit/coverage',
  collectCoverageFrom: [
    'src/**/*.{js,vue}',
    '!src/main.js',
    '!src/router/index.js',
    '!**/node_modules/**'
  ]
}

jest单元测试的代码覆盖率显示不出来

npm list handlebars //查看版本信息

npm uninstall -g handlebars //卸载当前版本
npm install handlebars@4.5.3 //安装

npm run unit 运行报错没有了