test: adding lines to coverage code implemented for nurbs surface creation

[syscordan]

Description

Adding lines to cover NURBS surface code added for creating a surface from a NURBS surface

Checklist

• I have tested my changes locally.
• I have added necessary documentation or updated existing documentation.
• I have followed the coding style guidelines of this project.
• I have added appropriate unit tests.
• I have reviewed my changes before submitting this pull request.
• I have linked the issue or issues that are solved to the PR if any.
• I have assigned this PR to myself.
• I have added the minimum version decorator to any new backend method implemented.
• I have made sure that the title of my PR follows Conventional commits style (e.g. feat: extrude circle to cylinder)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.25%. Comparing base (e655d8b) to head (1d0c0ea).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2301   +/-   ##
=======================================
  Coverage   95.24%   95.25%           
=======================================
  Files         169      169           
  Lines       11185    11185           
=======================================
+ Hits        10653    10654    +1     
+ Misses        532      531    -1     

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