Angular CLI - 代码覆盖率

本章通过示例解释了代码覆盖率命令的语法。

句法

代码覆盖率命令的语法如下 -

ng test <project> --codeCoverage=true

ng test 命令允许使用编写的测试用例检查代码覆盖率。请参阅下面的示例。

移动到使用ng xi18n命令更新的角度项目。本章可从https://www.tutorialspoint.com/angular_cli/angular_cli_ng_xi18n.htm 获取。现在，使用 codeCoverage 命令运行测试。

例子

下面给出了 ng 代码覆盖率命令的示例 -

\>Node\>TutorialsPoint> ng test --codeCoverage=true
10% building 2/2 modules 0 active07 06 2020 15:21:46.292:WARN [karma]: No captur
ed browser, open http://localhost:9876/
07 06 2020 15:21:46.299:INFO [karma-server]: Karma v4.4.1 server started at http
://0.0.0.0:9876/
07 06 2020 15:21:46.300:INFO [launcher]: Launching browsers Chrome with concurre
ncy unlimited
07 06 2020 15:21:46.312:INFO [launcher]: Starting browser Chrome
07 06 2020 15:21:55.456:WARN [karma]: No captured browser, open http://localhost
:9876/
07 06 2020 15:21:55.533:INFO [Chrome 83.0.4103 (Windows 7.0.0)]: Connected on so
cket gJgRaX_rXI6ZqoAiAAAA with id 261512
...
Chrome 83.0.4103 (Windows 7.0.0): Executed 1 of 2 SUCCESS (0 secs / 0.053 secs)
...
Chrome 83.0.4103 (Windows 7.0.0): Executed 2 of 2 SUCCESS (0.107 secs / 0.082 se
cs)
TOTAL: 2 SUCCESS

=============================== Coverage summary ===============================

Statements   : 100% ( 8/8 )
Branches     : 100% ( 0/0 )
Functions    : 100% ( 3/3 )
Lines        : 100% ( 6/6 )
================================================================================

现在 ng test 命令已在项目文件夹TutorialsPoint 中创建了一个覆盖率文件夹，并准备了html 格式的覆盖率报告，如\>Node\>TutorialsPoint\>coverage\>TutorialsPoint\>index.html。