karma-env-preprocessor

> Preprocessor which makes environment variables available to your tests.

Installation

The easiest way is to keep karma-env-preprocessor as a devDependency in your package.json.
``json
{
"devDependencies": {
"karma": "~0.10",
"karma-env-preprocessor": "~0.1"
}
}
`

You can simple do it by:
`bash
npm install karma-env-preprocessor --save-dev
`

Configuration


Any files you preprocess using this plugin will be affected, e.g for all JavaScript files:
`js
// karma.conf.js
module.exports = function(config) {
config.set({
preprocessors: {
'*/.js': ['env']
},

envPreprocessor: [
'PATH',
'HOME'
]
});
};
`

How does it work ?

This preprocessor uses process.env to read the value of each environment variable specified in envPreprocessor and publishes them in the global window.__env__, so you can read these values in your tests.

For example, the above configuration will be served as:
`js
window.__env__ = window.__env__ || []
window.__env__['PATH'] = '/usr/sbin:/usr/bin:/sbin:/bin';
window.__env__['HOME'] = '/home/jsok';
``

----

For more information on Karma see the [homepage].

[homepage]: http://karma-runner.github.com