Question

我在开玩笑中并行跑步时测试失败。

当我尝试并运行时

jest

从我的项目根目录中，我收到以下错误，测试过程终止。

“工人进程意外退出！”

我正在使用jest 19.0.2和节点6.9.4。我还尝试过节点7.7.2和jest 19.0的其他组合，这两种组合都不起作用。

请注意，当我使用

顺序运行测试时

jest --runInBand

我的测试工作正常。虽然由于它们没有并行运行，但速度较慢，这并不理想。

我的测试为每个新测试启动相同的服务器，因此可能并行运行意味着多个测试试图在已经运行的端口上启动服务器。

这是我的package.json：

{
  "name": "app",
  "version": "0.1.0",
  "private": true,
  "devDependencies": {
    "autoprefixer": "6.5.1",
    "babel-core": "6.17.0",
    "babel-eslint": "7.1.1",
    "babel-jest": "17.0.2",
    "babel-loader": "6.2.7",
    "babel-preset-react-app": "^2.0.1",
    "case-sensitive-paths-webpack-plugin": "1.1.4",
    "chai": "^3.5.0",
    "chai-as-promised": "^6.0.0",
    "chalk": "1.1.3",
    "connect-history-api-fallback": "1.3.0",
    "cross-spawn": "4.0.2",
    "css-loader": "0.26.0",
    "detect-port": "1.0.1",
    "dotenv": "2.0.0",
    "eslint": "3.8.1",
    "eslint-config-react-app": "^0.5.0",
    "eslint-loader": "1.6.0",
    "eslint-plugin-flowtype": "2.21.0",
    "eslint-plugin-import": "2.0.1",
    "eslint-plugin-jsx-a11y": "2.2.3",
    "eslint-plugin-react": "6.4.1",
    "extract-text-webpack-plugin": "1.0.1",
    "file-loader": "0.9.0",
    "filesize": "3.3.0",
    "fs-extra": "0.30.0",
    "gzip-size": "3.0.0",
    "html-webpack-plugin": "2.24.0",
    "http-proxy-middleware": "0.17.2",
    "jest": "^19.0.2",
    "jest-css-modules": "^1.1.0",
    "json-loader": "0.5.4",
    "object-assign": "4.1.0",
    "path-exists": "2.1.0",
    "postcss-loader": "1.0.0",
    "promise": "7.1.1",
    "react-dev-utils": "^0.4.2",
    "recursive-readdir": "2.1.0",
    "redux-mock-store": "^1.2.2",
    "sinon": "^1.17.7",
    "strip-ansi": "3.0.1",
    "style-loader": "0.13.1",
    "supertest": "^3.0.0",
    "url-loader": "0.5.7",
    "webpack": "1.14.0",
    "webpack-dev-server": "1.16.2",
    "webpack-manifest-plugin": "1.1.0",
    "whatwg-fetch": "1.0.0"
  },
  "dependencies": {
    "axios": "^0.15.3",
    "bcrypt-nodejs": "0.0.3",
    "body-parser": "^1.16.0",
    "cors": "^2.8.1",
    "eventemitter2": "^3.0.1",
    "express": "^4.14.0",
    "jwt-simple": "^0.5.1",
    "mocha": "^3.2.0",
    "mongoose": "^4.7.8",
    "morgan": "^1.7.0",
    "nodemon": "^1.11.0",
    "passport": "^0.3.2",
    "passport-jwt": "^2.2.1",
    "passport-local": "^1.0.0",
    "react": "^15.4.2",
    "react-dom": "^15.4.2",
    "react-redux": "^5.0.2",
    "react-router": "^3.0.2",
    "redux": "^3.6.0",
    "redux-devtools-extension": "^2.13.0",
    "redux-form": "^5.3.3",
    "redux-socket.io": "^1.3.1",
    "redux-thunk": "^2.2.0",
    "socket.io-client": "^1.7.3",
    "socketio-auth": "^0.1.0"
  },
  "scripts": {
    "start": "node scripts/start.js",
    "build": "node scripts/build.js",
    "test": "jest --runInBand"
  },
  "jest": {
    "collectCoverageFrom": [
      "src/**/*.{js,jsx}"
    ],
    "setupFiles": [
      "<rootDir>/config/polyfills.js"
    ],
    "testPathIgnorePatterns": [
      "<rootDir>[/\\\\](build|docs|node_modules)[/\\\\]"
    ],
    "testEnvironment": "jest-environment-jsdom",
    "testURL": "http://localhost",
    "transform": {
      "^.+\\.(js|jsx)$": "<rootDir>/node_modules/babel-jest",
      "^.+\\.css$": "<rootDir>/node_modules/jest-css-modules"
    },
    "transformIgnorePatterns": [
      "[/\\\\]node_modules[/\\\\].+\\.(js|jsx)$"
    ],
    "verbose": true,
    "moduleNameMapper": {
      "^react-native$": "react-native-web"
    }
  },
  "babel": {
    "presets": [
      "react-app"
    ]
  },
  "eslintConfig": {
    "extends": "react-app"
  }
}

Answer 1

尝试将此标志添加到jest CLI命令：

jest --env=jsdom --runInBand

来自Jest API文档的

http://facebook.github.io/jest/docs/cli.html#env-environment

当在游戏中并行运行时，测试过程终止 - “工作进程意外退出！”

1 个答案: