javascript - 未定义导出 "MyModule"- 在 Jest 测试中

Question

我试图有选择地导出这个模块，它在测试中失败，否则导出一个空白模块(这样测试就不会报错)。按照这个 SO 答案:Skip import when react component created by jest

let Analytics;
let Segment;
if (process.env.JEST_WORKER_ID == undefined){
  Analytics = require('@segment/analytics.js-core');
  Segment = require('@segment/analytics.js-integration-segmentio');
}
else {
  // If we're testing...
  Analytics = {
    page() {},
    track() {},
    identify() {},
    initialize() {},
    addIntegration() {},
  };
  Segment = {};
}    
console.log(Analytics);
export {Analytics};

如果我删除导出，当我运行 jest 测试时，console.log() 行会得到这个:

{ page: [Function: page],
  track: [Function: track],
  identify: [Function: identify],
  initialize: [Function: initialize],
  addIntegration: [Function: addIntegration] }

但是，当我进行导出时，我遇到了这个问题:

SyntaxError: index.js: Export 'Analytics' is not defined (36:8)

还有其他导出方式吗？知道为什么我会收到此语法错误吗？我会提到，当运行在本地执行此导入的应用程序时，一切正常。

Answer 1

尝试在导出时明确命名导出，所以

export { Analytics as Analytics };