使用Jest和Webpack别名进行测试

Question

我希望能够在使用jest时使用webpack别名来解析导入，并且最好参考webpack.aliases以避免重复。

开玩笑的conf：

  "jest": {
    "modulePaths": ["src"],
    "moduleDirectories": ["node_modules"],
    "moduleNameMapper": {
      "^@shared$": "<rootDir>/shared/",
      "^@components$": "<rootDir>/shared/components/"
    }
  },

Webpack别名：

exports.aliases = {
    '@shared': path.resolve(paths.APP_DIR, 'shared'),
    '@components': path.resolve(paths.APP_DIR, 'shared/components'),
};

进口：

import Ordinal from '@shared/utils/Ordinal.jsx';
import Avatar from '@components/common/Avatar.jsx';

由于某种原因，@导致了问题，因此将其删除（使用别名和导入）时，可以找到shared但components仍然无法解决。

 FAIL  src/shared/components/test/Test.spec.jsx
  ● Test suite failed to run

    Cannot find module '@shared/utils/Ordinal.jsx' from 'Test.jsx'

我尝试使用jest-webpack-alias，babel-plugin-module-resolver和Jest / Webpack
docs

Answer 1

这似乎已解决。

以下是有效的设置：

版本号

"jest": "~20.0.4"

"webpack": "^3.5.6"

package.json

"jest": {
  "moduleNameMapper": {
    "^@root(.*)$": "<rootDir>/src$1",
    "^@components(.*)$": "<rootDir>/src/components$1",
  } 
}

webpack.shared.js

const paths = {
  APP_DIR: path.resolve(__dirname, '..', 'src'),
};

exports.resolveRoot = [paths.APP_DIR, 'node_modules'];

exports.aliases = {
  '@root': path.resolve(paths.APP_DIR, ''),
  '@components': path.resolve(paths.APP_DIR, 'components'),
};