Hello everyone!
我对开 Jest 有意见。 我想 Jest 测试一个 view.js 应用程序。 该应用程序已经很先进了。
我创建了一个非常简单的测试来理解操作,但它总是返回错误。
FAIL test/unit/specs/sum.test.js
● Test suite failed to run
at createDescriptor (node_modules/@babel/core/lib/config/config-descriptors.js:178:11)
at items.map (node_modules/@babel/core/lib/config/config-descriptors.js:109:50)
at Array.map (<anonymous>)
at createDescriptors (node_modules/@babel/core/lib/config/config-descriptors.js:109:29)
at createPresetDescriptors (node_modules/@babel/core/lib/config/config-descriptors.js:101:10)
at presets (node_modules/@babel/core/lib/config/config-descriptors.js:47:19)
at mergeChainOpts (node_modules/@babel/core/lib/config/config-chain.js:320:26)
at node_modules/@babel/core/lib/config/config-chain.js:283:7
at buildRootChain (node_modules/@babel/core/lib/config/config-chain.js:120:22)
at loadPrivatePartialConfig (node_modules/@babel/core/lib/config/partial.js:85:55)
这是我的配置状态:
包.json
脚本
部分:
"scripts": {
"dev": "webpack-dev-server --inline --progress --config build/webpack.dev.conf.js",
"start": "npm run dev",
"unit": "cross-env BABEL_ENV=test karma start test/unit/karma.conf.js --single-run",
"e2e": "node test/e2e/runner.js",
"test": "jest",
"lint": "eslint --ext .js,.vue src test/unit test/e2e/specs",
"build": "node build/build.js"
}
Jest
部分:
"jest": {
"moduleFileExtensions": [
"js",
"json",
"vue"
],
"transform": {
".*\\.(vue)$": "vue-jest",
"^.+\\.js$": "<rootDir>/node_modules/babel-jest"
},
"moduleNameMapper": {
"^@/(.*)$": "<rootDir>/src/$1"
}
}
devDependencies
部分:
"devDependencies": {
"@vue/test-utils": "^1.0.0-beta.29",
"autoprefixer": "^7.1.2",
"babel-core": "^6.22.1",
"babel-eslint": "^8.2.1",
"babel-helper-vue-jsx-merge-props": "^2.0.3",
"babel-jest": "^24.1.0",
"babel-loader": "^7.1.1",
"babel-plugin-istanbul": "^4.1.1",
"babel-plugin-syntax-jsx": "^6.18.0",
"babel-plugin-transform-runtime": "^6.22.0",
"babel-plugin-transform-vue-jsx": "^3.5.0",
"babel-preset-env": "^1.3.2",
"babel-preset-stage-2": "^6.22.0",
"babel-register": "^6.22.0",
"chai": "^4.1.2",
"chalk": "^2.0.1",
"chromedriver": "^2.27.2",
"copy-webpack-plugin": "^4.0.1",
"cross-env": "^5.0.1",
"cross-spawn": "^5.0.1",
"css-loader": "^0.28.11",
"eslint": "^4.15.0",
"eslint-config-standard": "^10.2.1",
"eslint-friendly-formatter": "^3.0.0",
"eslint-loader": "^1.7.1",
"eslint-plugin-import": "^2.7.0",
"eslint-plugin-node": "^5.2.0",
"eslint-plugin-promise": "^3.4.0",
"eslint-plugin-standard": "^3.0.1",
"eslint-plugin-vue": "^4.0.0",
"extract-text-webpack-plugin": "^3.0.0",
"file-loader": "^1.1.4",
"friendly-errors-webpack-plugin": "^1.6.1",
"html-webpack-plugin": "^2.30.1",
"inject-loader": "^3.0.0",
"jest": "^24.1.0",
"karma": "^1.4.1",
"karma-coverage": "^1.1.1",
"karma-mocha": "^1.3.0",
"karma-phantomjs-launcher": "^1.0.2",
"karma-phantomjs-shim": "^1.4.0",
"karma-sinon-chai": "^1.3.1",
"karma-sourcemap-loader": "^0.3.7",
"karma-spec-reporter": "0.0.31",
"karma-webpack": "^2.0.2",
"mocha": "^3.2.0",
"nightwatch": "^0.9.12",
"node-notifier": "^5.1.2",
"optimize-css-assets-webpack-plugin": "^3.2.0",
"ora": "^1.2.0",
"phantomjs-prebuilt": "^2.1.14",
"portfinder": "^1.0.13",
"postcss-import": "^11.0.0",
"postcss-loader": "^2.0.8",
"postcss-url": "^7.2.1",
"rimraf": "^2.6.0",
"selenium-server": "^3.0.1",
"semver": "^5.3.0",
"shelljs": "^0.7.6",
"sinon": "^4.0.0",
"sinon-chai": "^2.8.0",
"style-loader": "^0.20.3",
"stylus": "^0.54.5",
"stylus-loader": "^3.0.2",
"uglifyjs-webpack-plugin": "^1.1.1",
"url-loader": "^0.5.8",
"vue-jest": "^3.0.3",
"vue-loader": "^13.3.0",
"vue-style-loader": "^3.0.1",
"vue-template-compiler": "^2.5.2",
"webpack": "^3.6.0",
"webpack-bundle-analyzer": "^2.9.0",
"webpack-dev-server": "^2.9.1",
"webpack-merge": "^4.1.0"
}
要测试的功能
文件名sum.js
export default function sum (a, b) {
return a + b
}
必须测试功能的文件
文件sum.test.js
import sum from '../../../src/components/sum'
describe('sum', () => {
it('create sum of 2 numbrers', () => {
expect(sum(15, 8)).toBe(23)
})
})
文件结构之类的:
src
-components
--sum.js
test
-unit
--specs
---sum.test.js
最佳答案
从来没有遇到过你的问题,所以我不知道这是否有帮助,但是:
"^.+\\.js$": "<rootDir>/node_modules/babel-jest"
这条线让我很困扰。如果我在我的 node_modules 本地安装 babel-jest
,在 node_modules/babel-jest/
下有一个 build
文件夹和 index .js
。 node_modules/babel-jest
下没有可执行文件。也许这就是您问题的根源。
我会尝试:
"^.+\.js$": "babel-jest"
如果不行,我会尝试:
"^.+\\.js$": "<rootDir>/node_modules/babel-jest/build"
祝你好运!
关于javascript - JEST 和 Vue.js 失败 "Plugin/Preset files are not allowed to export objects, only functions.",我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/54946660/