OF-2831: Modify tests to cover offending data

[guusdk]

This modifies existing unit tests to explicitly use data that appears to have triggered OF-2831. The resulting tests do not fail.

[github-actions]

Backport failed for 4.9, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally and resolve any conflicts.

git fetch origin 4.9
git worktree add -d .worktree/backport-2670-to-4.9 origin/4.9
cd .worktree/backport-2670-to-4.9
git switch --create backport-2670-to-4.9
git cherry-pick -x 3c479256c70b194297659750659e267fc7c47d5b

[guusdk]

Maybe not bother with the backport if that conflicts?

[akrherz]

Maybe not bother with the backport if that conflicts?

I was curious if this issue would reproduce on the 4.9 branch. It is a simple patch, I'll manually effort now.