Added e2e testing

[SimonSimCity]

Added a foundation of e2e testing. Please give feedback!

How variables can be set can be found here: https://docs.cypress.io/guides/guides/environment-variables#Setting

I've added the two currently in use (USERNAME and PASSWORD) already to the github-script which should already work correctly after setting 'em up.

The build_and_test job fails because of the missing credentials.

We should also address here if we want the project to deploy if the e2e tests are failing due to a shift in data (e.g. test-data is not available as expected) or if the login service is unavailable or doesn't let us pass for other reasons.

[kkuepper]

I added the 2 secrets.
But the build fails in the linter step

[codecov]

Codecov Report

Merging #58 (4bb166b) into main (75e75f6) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main       #58   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         3           
  Lines           71        71           
  Branches         5         5           
=========================================
  Hits            71        71           

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[kkuepper]

should this file be committed? Looks like a left-over

[SimonSimCity]

I haven't yet fully understood what the code-examples here are for - they're provided by the code generator. I'd commit it as part of understanding of what we can do, but I don't have any strong opinion on this ... What would you say is better?

Btw, the first line is a so-called triple-slash directive

[SimonSimCity]

It seems like within github-actions, we have a problem reaching out to localhost as described in cypress-io/github-action#802 ... Testing out different strategies to see which may get it to work without switching from the name localhost ... Or we'll have to change the addresses allowed by for the auth0 credentials.

[SimonSimCity]

Problem referenced previously (regarding localhost) isn't relevant here. After watching the video of the test, I saw that there's a problem with the test-user we have, which should be solved by our login service.

Videos and screenshots of tests are from now on available as artifacts on this project (!to everyone!). Steps for typing in credentials or confidential data should have the option log set to false: https://stackoverflow.com/questions/50568526/is-there-any-way-to-hide-a-log-in-cypress