add unit tests for `ArgumentMapper` push `felt252`

[tcoratger]

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Checklist

• [ ] Linked to Github Issue
• [ ] Unit tests added
• [ ] Integration tests added.
• [ ] This change requires new documentation.
  • [ ] Documentation has been added/updated.

[codecov-commenter]

Codecov Report

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

Project coverage is 91.57%. Comparing base (fd93b34) to head (3ed4312).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #702      +/-   ##
==========================================
+ Coverage   91.52%   91.57%   +0.04%     
==========================================
  Files         118      118              
  Lines       32790    32974     +184     
==========================================
+ Hits        30012    30196     +184     
  Misses       2778     2778              

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[azteca1998]

ArgumentMapper doesn't exist anymore.