[英]How does “npm” run “npm test”?
I always thought that npm test
command just launches what I would write in package.json
inside scripts: { test: ...}
section. 我一直认为
npm test
命令只是启动我在package.json
里面写的scripts: { test: ...}
部分。 But I have this weird bug when it doesn't work. 但是当它不起作用时,我有这个奇怪的错误。
So, I have this piece of config in package.json
所以,我在
package.json
有这个配置
"scripts": {
"start": "node index.js",
"test": "mocha tests/spec.js"
}
When I try to run tests I type npm test
in terminal and had this error: 当我尝试运行测试时,我在终端中键入
npm test
并出现此错误:
module.js:340
throw err;
^
Error: Cannot find module 'commander'
But everything is OK when I type just mocha tests/spec.js
. 但是当我输入
mocha tests/spec.js
时,一切都mocha tests/spec.js
。 Any ideas why is that? 任何想法为什么会这样?
UPDATE: 更新:
I've tried to install commander and I had an error Cannot find module 'glob' . 我试图安装指挥官,我有一个错误找不到模块'glob' 。 After installing
glob
I have 安装完成后
glob
我有
Error: Cannot find module '../'**
错误:找不到模块'../'**
But actually question is why do I have these errors and why is everything OK when running mocha tests/spec.js
? 但实际问题是为什么我有这些错误,为什么运行
mocha tests/spec.js
时一切正常?
You may have two versions of mocha installed: one globally ( npm install -g mocha
) and one locally, which appears to be broken. 您可能安装了两个版本的mocha:一个是全局的(
npm install -g mocha
),另一个是本地的,看起来很糟糕。
When you run a script through npm
, either as npm run-script <name>
or with a defined shortcut like npm test
or npm start
, your current package directory's bin
directory is placed at the front of your path. 当您通过
npm
运行脚本时,无论是npm run-script <name>
还是使用npm test
或npm start
等已定义的快捷方式,您当前的包目录的bin
目录都会放在路径的前面。 For your package that's probably ./node_modules/.bin/
, which contains a link to your package's mocha
executable script. 对于你的包可能是
./node_modules/.bin/
,它包含你的包的mocha
可执行脚本的链接。
You can probably fix this by removing the local mocha and reinstalling it with --save-dev: 您可以通过删除本地摩卡并使用--save-dev重新安装它来解决此问题:
rm -rf node_modules/mocha
npm install --save-dev mocha
That should get you a working local copy of mocha with all its dependencies (commander etc.) installed. 这应该会让你获得一个工作的mocha本地副本及其所有依赖项(指挥官等)。
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