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我正在尝试运行 jest 来对我的 es6 模块进行单元测试。尝试运行测试用例时出现以下错误：

TypeError: authentication.test.js: Cannot read property 'value' of undefined
at node_modules/@babel/helper-module-transforms/lib/index.js:92:30
          at Array.some (<anonymous>)
      at rewriteModuleStatementsAndPrepareHeader (node_modules/@babel/helper-module-transforms/lib/index.js:91:44)
      at PluginPass.exit (node_modules/@babel/plugin-transform-modules-commonjs/lib/index.js:148:83)
      at newFn (node_modules/@babel/traverse/lib/visitors.js:175:21)
      at NodePath._call (node_modules/@babel/traverse/lib/path/context.js:55:20)
      at NodePath.call (node_modules/@babel/traverse/lib/path/context.js:42:17)
      at NodePath.visit (node_modules/@babel/traverse/lib/path/context.js:101:8)
      at TraversalContext.visitQueue (node_modules/@babel/traverse/lib/context.js:116:16)
      at TraversalContext.visitSingle (node_modules/@babel/traverse/lib/context.js:85:19)

错误所在行的代码

const hasStrict = path.node.directives.some(directive => {
      return directive.value.value === "use strict";
    });

这里的directive.value 是未定义的。

知道如何解决这个问题吗？在运行之前是否需要设置一些环境或配置，以便directive.value.value 为“使用严格”。我在上面的行上通过硬编码return true进行了测试，测试用例完美地工作，没有任何错误。

我的 package.json 有以下内容：

  "devDependencies": {
    "@babel/core": "^7.13.14",
    "@babel/helper-module-transforms": "^7.13.14",
    "@babel/preset-env": "^7.13.12",
    "axios": "^0.21.1",
    "babel-plugin-eslint-disable": "^0.1.2",
    "eslint": "^6.6.0",
    "gulp-babel": "^8.0.0",
    "jest": "^26.6.3",
    "webpack": "^5.24.2",
    "webpack-cli": "^4.5.0"
  },
  "type": "module"
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