小编典典

使用Jest和Webpack别名进行测试

reactjs

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sharedcomponents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-aliasbabel-plugin-module-resolverJest / Webpack
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2020-07-22

共1个答案

小编典典

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'),
};
2020-07-22