尝试导入要在单元测试中使用的文件时，出现错误
Jest遇到意外令牌-这通常意味着您 正在尝试导入Jest无法解析的文件，例如不是 普通的JavaScript。
文件内容似乎无关紧要。
这是package.json
"devDependencies": {
"@babel/core": "^7.4.4",
"@babel/preset-env": "^7.4.4",
"@nuxtjs/style-resources": "^0.1.2",
"@vue/cli-plugin-eslint": "^3.7.0",
"@vue/eslint-config-prettier": "^4.0.1",
"babel-eslint": "^10.0.1",
"eslint": "^5.16.0",
"eslint-config-prettier": "^4.2.0",
"eslint-friendly-formatter": "^4.0.1",
"eslint-loader": "^2.1.2",
"eslint-plugin-prettier": "^3.0.1",
"eslint-plugin-vue": "^5.2.2",
"jest-transform-stub": "^2.0.0",
"node-sass": "^4.12.0",
"nodemon": "^1.19.0",
"prettier": "^1.17.0",
"prettier-eslint-cli": "^4.7.1",
"sass-loader": "^7.1.0",
"wallaby-vue-compiler": "^1.0.5"
},
"babel": {
"presets": [
"@babel/preset-env"
]
},
"jest": {
"moduleFileExtensions": [
"js",
"json",
"vue"
],
"transform": {
"^.+.vue$": "vue-jest",
"^.+.js$": "babel-jest",
"^.+\\.js$": "<rootDir>/node_modules/babel-jest"
},
"moduleNameMapper": {
"@/(.*)$": "<rootDir>/$1",
"^vue$": "vue/dist/vue.common.js"
}
}
}