Address undercoverage for diagram proxy

Asherah Connorrequested to merge
push-lnvyyskosout into master

What does this MR do and why?

Resolves Address undercoverage for !223314 (#593052 - closed) by adding coverage for the missed paths in Add diagram proxy to route Kroki/PlantUML reque... (!223314 - merged) noted in https://gitlab.com/gitlab-org/gitlab/-/jobs/13442626929.

How to set up and validate locally

This is just adding specs, there's no change in behaviour whatsoever. Specs are run by CI so I don't think there's any need for local setup/validation.

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Edited by Asherah Connor

Merge request reports