How to stub process.env in node.js?

Question

I want to stub process.env.FOO with bar.

var sinon = require(\'sinon\');
var stub = sinon.stub(process.env, \'FOO\', \'bar\');
<         


        

Answer 1

With sinon you can stub any variable like this.

 const myObj = {
    example: 'oldValue', 
 };

 sinon.stub(myObj, 'example').value('newValue');

 myObj.example; // 'newValue'

---

This example is form sinon documentation. https://sinonjs.org/releases/v6.1.5/stubs/

---

With that knowledge, you can stub any environment variable. In your case it would look like this:

 let stub = sinon.stub(process.env, 'FOO').value('bar');