feat(gnodev): add node tests

[gfanton]

Add gnodev tests

Contributors' checklist...

• [ ] Added new tests, or not needed, or not feasible
• [ ] Provided an example (e.g. screenshot) to aid review or the PR is self-explanatory
• [ ] Updated the official documentation or not needed
• [ ] No breaking changes were made, or a BREAKING CHANGE: xxx message was included in the description
• [ ] Added references to related issues and PRs
• [ ] Provided any useful hints for running manual tests
• [ ] Added new benchmarks to generated graphs, if any. More info here.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 48.36%. Comparing base (f660be5) to head (52a2982).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1668      +/-   ##
==========================================
+ Coverage   46.63%   48.36%   +1.73%     
==========================================
  Files         492      409      -83     
  Lines       69624    62035    -7589     
==========================================
- Hits        32472    30006    -2466     
+ Misses      34445    29531    -4914     
+ Partials     2707     2498     -209     

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