为什么NPM run test命令失败并显示npm ERR！代码ELIFECYCLE错误？

Question

我的Angular CI构建在NPM测试任务中失败，我在CI中运行 npm run Test：sonar 命令。

test：sonar是在顶部的package.json文件中定义的，具有以下详细信息，

“ test：sonar”：“ node --max_old_space_size = 4096 node_modules / @ angular / cli / bin / ng test --watch = false --code-coverage --karma-config = src / karma。 conf.sonar.js”，

当前，我遇到CI错误，并且如果手动执行npm run test：sonar，

2020-06-04T10:12:40.5784545Z Browserslist: caniuse-lite is outdated. Please run next command `npm update`
2020-06-04T10:12:41.7505089Z [32m04 06 2020 06:12:41.749:INFO [framework:karma-parallel]: [39msharding specs across 3 browsers
2020-06-04T10:13:03.9245412Z [32m04 06 2020 06:13:03.921:INFO [karma-server]: [39mKarma v4.1.0 server started at http://0.0.0.0:9876/
2020-06-04T10:13:03.9245412Z [32m04 06 2020 06:13:03.921:INFO [launcher]: [39mLaunching browsers Chrome, Chrome, Chrome with concurrency unlimited
2020-06-04T10:13:03.9245412Z [32m04 06 2020 06:13:03.921:INFO [launcher]: [39mStarting browser Chrome
2020-06-04T10:13:04.0026773Z [32m04 06 2020 06:13:03.999:INFO [launcher]: [39mStarting browser Chrome
2020-06-04T10:13:04.0339834Z [32m04 06 2020 06:13:04.030:INFO [launcher]: [39mStarting browser Chrome
2020-06-04T10:13:55.9279235Z [32m04 06 2020 06:13:55.925:INFO [Chrome 83.0.4103 (Windows 10.0.0)]: [39mConnected on socket gpO5ue6BN2Mpg7E1AAAB with id 40174053
2020-06-04T10:13:55.9369226Z [32m04 06 2020 06:13:55.929:INFO [Chrome 83.0.4103 (Windows 10.0.0)]: [39mConnected on socket detlQaSArnTujK4UAAAA with id 82416436
2020-06-04T10:13:55.9369226Z [32m04 06 2020 06:13:55.931:INFO [Chrome 83.0.4103 (Windows 10.0.0)]: [39mConnected on socket mhjlHwvj60_SZr0tAAAC with id 99954543
2020-06-04T10:15:08.0931637Z [33m04 06 2020 06:15:08.091:WARN [launcher]: [39mChrome was not killed in 2000 ms, sending SIGKILL.
2020-06-04T10:15:08.4838243Z npm ERR! code ELIFECYCLE
2020-06-04T10:15:08.4838243Z npm ERR! errno 1
2020-06-04T10:15:08.4838243Z npm ERR! nextgen@0.0.1 test:sonar: `node --max_old_space_size=4096 node_modules/@angular/cli/bin/ng test --watch=false --code-coverage --karma-config=src/karma.conf.sonar.js`
2020-06-04T10:15:08.4994524Z npm ERR! Exit status 1
2020-06-04T10:15:08.4994524Z npm ERR! 
2020-06-04T10:15:08.4994524Z npm ERR! Failed at the nextgen@0.0.1 test:sonar script.
2020-06-04T10:15:08.4994524Z npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
2020-06-04T10:15:08.4994524Z 
2020-06-04T10:15:08.4994524Z npm ERR! A complete log of this run can be found in:
2020-06-04T10:15:08.4994524Z npm ERR!     C:\Users\svc_TFSservice\AppData\Roaming\npm-cache\_logs\2020-06-04T10_15_08_499Z-debug.log

还添加了CMD提示的屏幕截图，不确定是由于chrome超时还是其他导致此错误的原因。我已经使用了很多个月了，直到今天它工作正常。 任何建议或帮助都会很棒。

同时，我还将寻找其他导致此错误的解决方案/原因。

Answer 1

这个错误往往会让人很困惑，但是您对Chrome的看法是正确的。最终的警告消息指出了实际的错误是测试脚本被测试运行程序杀死：

2020-06-04T10:15:08.0931637Z [33m04 06 2020 06:15:08.091:WARN [launcher]: [39mChrome was not killed in 2000 ms, sending SIGKILL.

您可能正在通过npm run <>命令调用测试，这就是错误消息所提到的“生命周期”脚本。 scripts可以用作npm提供的钩子集的一部分，以提供钩子进入软件包构建/安装生命周期。这是一条普通的错误消息，使您无法自拔。

Answer 2

我能够通过将karma.conf.sonar.js文件中执行程序的值从3更新为4来解决此问题。由于它必须执行1700多个测试用例，因此我认为3个chrome无法执行它们，因此将其更新为4个可以停止抛出错误。

当前，npm测试在CI构建和CMD提示符下都可以正常工作。