Feature: New test for t8_forest_element_neighbor_eclass #2240
Description
Feature request
Is your feature request related to a problem? Please describe.
The function t8_forest_element_neighbor_eclass in t8_forest.cxx (introduced in #1736) is untested.
Describe the solution or feature you'd like
Write a test for t8_forest_element_neighbor_eclass
Describe alternatives you've considered
Not testing leads to undiscovered bugs.
Estimated priority
Which of these is most applicable (remove the others):
"Priority: medium" Should be solved within half a year
Additional context
I quote my past self:
"On Nov 7 2025 i found a bug in it that would have been caught by testing
(the face number of the element was used as the cmesh tree face number, which is incorrect)."