Mock next-auth / Keycloak session state, for testing purposes

[jhroemer]

Hi there!

I'm trying to set up automated Playwright tests with a next application using next-auth 4 with Keycloak as a provider. The tests will mock all responses from API's, and I I'm looking into mocking the authenticated state as well. I've done something similar with a Vite application using Okta in the past, following the approach outlined in this article, where you set a few Okta specific cookies and mock an endpoint returning the user info.

I've been trying to achieve the same with next-auth and Keycloak, but I'm questioning whether I'm even able to achieve something like this, or if I should look into adding a test user to our Keycloak instance, and perform a 'real' login in our tests with that user. Would hugely appreciate input from anyone that have looked into a similar usecase! 🙇

Kindest regards
Jens