Angular : ERROR [karma-server]: UncaughtException: Error: spawn UNKNOWN

angular在单元测试时执行ng test --no-watch --code-coverage报异常如下：

ERROR [karma-server]: UncaughtException: Error: spawn UNKNOWN
    at ChildProcess.spawn (node:internal/child_process:414:11)
    at spawn (node:child_process:761:9)
    at spawnWithoutOutput (D:\Angular\node_modules\karma\lib\launchers\process.js:174:26)
    at ProcessLauncher._execCommand (D:\Angular\node_modules\karma\lib\launchers\process.js:75:21)
    at ProcessLauncher._start (D:\Angular\node_modules\karma\lib\launchers\process.js:33:10)
    at Object.<anonymous> (D:\Angular\node_modules\karma\lib\launchers\process.js:19:10)
    at Object.emit (node:events:529:35)
    at BaseLauncher.start (D:\Angular\node_modules\karma\lib\launchers\base.js:52:10)
    at Object.j (D:\Angular\node_modules\karma\lib\launcher.js:108:17)
    at setTimeout.bind.j (D:\Angular\node_modules\qjobs\qjobs.js:143:18)
ERROR [karma-server]: Error: spawn UNKNOWN
    at ChildProcess.spawn (node:internal/child_process:414:11)
    at spawnWithoutOutput (D:\Angular\node_modules\karma\lib\launchers\process.js:174:26)
    at ProcessLauncher._execCommand (D:\Angular\node_modules\karma\lib\launchers\process.js:75:21)
    at ProcessLauncher._start (D:\Angular\node_modules\karma\lib\launchers\process.js:33:10)
    at Object.<anonymous> (D:\Angular\node_modules\karma\lib\launchers\process.js:19:10)
    at Object.emit (node:events:529:35)
    at BaseLauncher.start (D:\Angular\node_modules\karma\lib\launchers\base.js:52:10)
    at Object.j (D:\Angular\node_modules\karma\lib\launcher.js:108:17)
    at setTimeout.bind.j (D:\Angular\node_modules\qjobs\qjobs.js:143:18) {
  errno: -4094,
  code: 'UNKNOWN',
  syscall: 'spawn'
}

原karma.conf.js 代码如下：

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular-devkit/build-angular'],
    plugins: [
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
      require('karma-jasmine-html-reporter'),
      require('karma-coverage-istanbul-reporter'),
      require('@angular-devkit/build-angular/plugins/karma'),
    ],
    client: {
      clearContext: true,
      captureConsole : false,
    },
    coverageIstanbulReporter: {
      dir: require('path').join(__dirname, './coverage'),
      reports: ['html', 'lcovonly', 'text-summary'],
      fixWebpackSourcePaths: true
    },
    reporters: ['progress', 'kjhtml', 'coverage-istanbul'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['ChromeHeadlessCI'],
    customLaunchers: {
      ChromeHeadlessCI: {
        base: 'ChromeHeadless',
        flags: [
          '--headless',
          '--no-sandbox',
          '--disable-setuid-sandbox',
          '--disable-gpu',
          '--disable-dev-shm-usage',
          '--disable-extensions',
          '--disable-infobars',
        ],
      },
    },
    singleRun: false,
    restartOnFileChange: true,
  });
};

解法：
1、添加puppeteer包，npm install puppeteer --save-dev
2、在karma.conf.js添加

const puppeteer = require('puppeteer');
process.env.CHROME_BIN = puppeteer.executablePath();

具体如下：