- 1 year ago
Set environment variables in Mocha under windows
To set environment variables for Mocha test scripts running under Windows, you can use the built-in cross-env
package, which works across platforms. The cross-env
package allows you to set environment variables in a way that works on both Windows and Unix-based systems (Linux, macOS).
Here's how you can use cross-env
to set environment variables for your Mocha test scripts:
Install
cross-env
:
First, install thecross-env
package as a dev dependency in your project. Open your terminal or command prompt and run the following command:bashnpm install cross-env --save-dev
Set Environment Variables:
In your test scripts, you can usecross-env
to set environment variables. For example, suppose you have a test script in yourpackage.json
:json"scripts": {
"test": "mocha test/**/*.js"
}
You can modify the script to set environment variables before running Mocha:
json"scripts": {
"test": "cross-env MY_ENV_VARIABLE=value mocha test/**/*.js"
}
Replace
MY_ENV_VARIABLE
with the name of your environment variable, andvalue
with the desired value you want to set.Access Environment Variables in Tests:
Inside your Mocha test scripts, you can access the environment variables like you would in regular Node.js scripts usingprocess.env
:js// test.js
const assert = require('assert');
describe('My Test Suite', function () {
it('should access environment variable', function () {
const myVar = process.env.MY_ENV_VARIABLE;
assert.strictEqual(myVar, 'value'); // Replace 'value' with the actual value you set
});
});
In this example, the test script checks whether the environment variable
MY_ENV_VARIABLE
is set to the expected value.
With cross-env
, your environment variables will be correctly set regardless of whether you are running the tests on Windows or other platforms.
Remember to adjust the test script and environment variable name according to your specific requirements. Additionally, if you are using a different test runner or test framework, you can still use cross-env
in a similar way to set environment variables for your tests.