Vue单元测试vue2-jest-coverage的package.json 配置

 依赖的版本很重要，不要出错了

devDependencies:{

　　"babel-core": "^6.26.3",

　　"babel-jest": "^22.4.3",

       "babel-loader": "^7.1.1",

       "babel-plugin-dynamic-import-webpack": "^1.1.0",

       "jest": "^24.9.0",

       "jest-serializer-vue": "^0.3.0",

       "jest-transform-stub": "^2.0.0",

　   "vue-jest": "^3.0.5",

       "vue-loader": "^13.7.1",

},

moduleFileExtensions: [

    'js',

    'jsx',

    'json',

    'vue'

  ],

  globals: {

  },

  transform: {

    '.*\\.(vue)$': 'vue-jest',

    '.+\\.(css|styl|less|sass|scss|png|jpg|ttf|woff|woff2)$': 'jest-transform-stub',

    '^.+\\.js$': '<rootDir>/node_modules/babel-jest'

  },

  transformIgnorePatterns: [

    '/node_modules/'

  ],

  moduleNameMapper: {

    '\\.(css|styl|less|sass|scss|jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$': '<rootDir>/__mocks__/fileMock.js',

    '^@/(.*)$': '<rootDir>/src/$1'

  },

  snapshotSerializers: [

    'jest-serializer-vue'

  ],

  testMatch: [

    '**/test/unit/**/*.spec.(js|jsx|ts|tsx)|**/__tests__/*.(js|jsx|ts|tsx)'

  ],

  testURL: 'http://localhost/',

  collectCoverage: true,

  collectCoverageFrom: [

    'src/page/**/*.{js,vue}'

  ],

  coverageDirectory: '<rootDir>/test/unit/coverage'