ng test --code-coverage 不打印覆盖率详细信息

Posted 2023-03-16

【中文标题】ng test --code-coverage 不打印覆盖率详细信息

【英文标题】：ng test --code-coverage not printing coverage details

【发布时间】：2018-12-05 13:11:16

【问题描述】：

当我使用ng test --code-coverage 运行测试时，我得到的代码覆盖率是未知的，不知道可能出了什么问题。感谢您提供任何帮助。

> ng test --code-coverage

 10% building modules 1/1 modules 0 active26 06 2018 11:00:51.088:WARN [karma]: No captured browser, open http://localhost:9876/
26 06 2018 11:00:51.095:INFO [karma]: Karma v2.0.0 server started at http://0.0.0.0:9876/
26 06 2018 11:00:51.095:INFO [launcher]: Launching browser Chrome with unlimited concurrency
26 06 2018 11:00:51.100:INFO [launcher]: Starting browser Chrome
26 06 2018 11:01:48.404:WARN [karma]: No captured browser, open http://localhost:9876/    
26 06 2018 11:01:48.665:INFO [Chrome 67.0.3396 (Mac OS X 10.11.6)]: Connected on socket UhrUQZiU8ZuG8qRwAAAA with id 31579746
Chrome 67.0.3396 (Mac OS X 10.11.6): Executed 1151 of 2149 (skipped 843) SUCCESS (0 secs / 0 secs)
26 06 2018 11:07:31.910:WARN [Chrome 67.0.3396 (Mac OS X 10.11.6)]: Disconnected (1 times), because no message in 10000 ms.
Chrome 67.0.3396 (Mac OS X 10.11.6) ERROR
Chrome 67.0.3396 (Mac OS X 10.11.6) ERROR
  Disconnected, because no message in 10000 ms.
Chrome 67.0.3396 (Mac OS X 10.11.6): Executed 1151 of 2149 (skipped 843) DISCONNECTED (5 mins 31.686 secs / 0 secs)
Chrome 67.0.3396 (Mac OS X 10.11.6) ERROR
Chrome 67.0.3396 (Mac OS X 10.11.6): Executed 1151 of 2149 (skipped 843) DISCONNECTED (5 mins 31.686 secs / 0 secs)

=============================== Coverage summary ===============================
Statements   : Unknown% ( 0/0 )
Branches     : Unknown% ( 0/0 )
Functions    : Unknown% ( 0/0 )
Lines        : Unknown% ( 0/0 )
Chrome 67.0.3396 (Mac OS X 10.11.6): Executed 1295 of 2149 (skipped 854) DISCONNECTED (6 mins 49.413 secs / 0 secs)

【问题讨论】：

转到项目根目录下的 ./coverage 文件夹。然后您可以打开 ./coverage/index.html 以查看覆盖率报告。

coverage/index.html 也将覆盖率显示为未知..

我也面临同样的问题你找到解决办法了吗

【参考方案1】：

我遇到了同样的问题，并通过确保将angular.json 中的"sourceRoot" 属性设置为项目源文件的根文件夹来修复它。

ng cli uses the files in "sourceRoot" to compute coverage。

对于测试，sourceRoot 似乎没有做任何其他事情，所以测试运行并通过，但覆盖不起作用。