Using in jest tests

[taviroquai]

Hi,

I would like to know out to use it in jest environment once I'm getting this error:

Cannot read property 'cookie' of undefined
at Cookies._updateBrowserValues (/home/bla/app/node_modules/universal-cookie/lib/Cookies.js:47:55)

I tried to set the cookie in the test like this, before calling the usage in app, but it didn't work:

import Cookies from 'universal-cookie'
const cookieHandler = new Cookies()
cookieHandler.set('foo', {}, { path: '/' });

Thanks

[charliewilco]

running into the same thing with cannot read get of undefined.
i wonder if we can just mock that out.

[eXon]

It should be easy to use universal-cookie with unit test. Just make sure you are defining the cookies, you don't need to mock it. All you need is pass an object to Cookies just like that:

import Cookies from 'universal-cookie'
const cookieHandler = new Cookies({ myCookie: 'meow!' });
cookieHandler.set('foo', {}, { path: '/' });

If you don't have any cookie, you can set an empty object.

[sylvainpina]

i have the same issue.
to fix this with jest 22.4.4, I do that, it's creepy but it works.

cookies = new Cookies({})
cookies.HAS_DOCUMENT_COOKIE = false

if not, universal-cookie believes environnement is browser, because jest load jsdom...

[pdesantis]

I had the same issue, and cookies.HAS_DOCUMENT_COOKIE = false fixed it. Thanks @sylvainpina!

Any thoughts on exposing this publicly? Or are there any better ways to make this jest-friendly?

[chj-damon]

@pdesantis it won't work in typescript.

[eXon]

In v4.0.1, it should detect JSDOM and skip the browser.

[mocantimoteidavid]

Would there be any other solution in making this work in typescript too?

[kevin-brotcke]

I was able to fix this in my case by specifying node as the jest environment since the code I was testing only runs on the server.

https://jestjs.io/docs/en/configuration.html#testenvironment-string

[jappareti]

@chj-damon @mocantimoteidavid I got it to work in typescript by doing this:

cookies = new Cookies({})
cookies['HAS_DOCUMENT_COOKIE'] = false