Cypress Plugin for Hostname Is Empty String

[tgf-coder]

I created a plugin in support/index.js

import './commands';
const os = require('os');


module.exports = (on, config) => {
  config.env.testing_computer = os.hostname();
  return config;
}

Basically I want to store the hostname in the environment variable testing_computer.
However when I try to access it later in a custom command by Cypress.env("testing_computer") it is an empty string. How can I get the actual value?

[amirrustam]

@tgf-coder you have to do this within the plugins file: https://docs.cypress.io/guides/tooling/plugins-guide.html#Use-Cases

Your current code is in the "support file" which only runs within the browser and not on your local system.

[tgf-coder]

Ok I changed it to plugins/index.js and it still has the same issue. Its an empty string

[bahmutov]

I pushed my code into https://github.com/cypress-io/cypress-test-tiny/tree/osname

// cypress/plugins/index.js
const os = require('os');
module.exports = (on, config) => {
  config.env.testing_computer = os.hostname();
  console.log('config env is', config.env)
  return config;
}

// cypress/integration/spec.js
/// <reference types="cypress" />
it('has hostname', () => {
  expect(Cypress.env('testing_computer')).to.be.a('string').and.not.be.empty
})

When Cypress opens you can find the hostname under Settings / configuration / env object

And in the test you can see the value

[tgf-coder]

Solved. I ended up clearing the contents of the plugin/index.js file and everything is now working.