使用打字稿进行的业力测试：找不到请求的文件

问题描述

我正在将与Karma的集成测试添加到React项目中，并且我有大量使用TypeScript编写的使用Chai编写的Mocha测试，这些测试使用ES6模块导入。希望所有内容都能一起工作，我添加了karma-typescript，karma-sourcemap-loader和@open-wc/karma-esm来转换打字稿测试。

要使用Karma运行这些测试，我已使用karma init my.conf.js初始化了以下项目：

// Karma configuration
// Generated on Tue Sep 22 2020 23:59:00 GMT+0200 (Central European Summer Time)

module.exports = function(config) {
  config.set({

    // base path that will be used to resolve all patterns (eg. files,exclude)
    basePath: '',plugins: [
      require.resolve('@open-wc/karma-esm'),'karma-*'
    ],// frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: [
      'mocha','chai','karma-typescript','esm'
    ],// list of files / patterns to load in the browser
    files: [
      'test/global.ts',{pattern: 'test/**/*.karma.ts',module: true}
    ],// list of files / patterns to exclude
    exclude: [
    ],// preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
      'test/**/*.ts': ['karma-typescript','sourcemap']
    },// test results reporter to use
    // possible values: 'dots','progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['progress'],// web server port
    port: 9876,// enable / disable colors in the output (reporters and logs)
    colors: true,// level of logging
    // possible values: config.LOG_disABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    logLevel: config.LOG_INFO,// enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,// start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ['Chrome'],// Continuous Integration mode
    // if true,Karma captures browsers,runs the tests and exits
    singleRun: false,// Concurrency level
    // how many browser should be started simultaneous
    concurrency: Infinity,karmaTypescriptConfig: {
      bundlerOptions: {
        sourceMap: true
      },compilerOptions: {
        emitDecoratorMetadata: true,experimentalDecorators: true,allowSyntheticDefaultImports: true,jsx: "react",module: "es6",moduleResolution: "node",sourceMap: true,target: "ES5"
      },exclude: ["node_modules"]
    }
  })
}

但是，当我使用$ npx karma start --log-level debug --no-single-run my.conf.js运行这些测试时，出现以下错误：

(...)
[karma-esm]: Could not find requested file: /test/sometest.karma.js?7f18cbf56f32714fa3b45bed3920cbf0123c0f13
(...)
TOTAL: 0 SUCCESS

有人知道为什么测试失败吗？

解决方法

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