test: 🧪 added missing tests for SLL, DLL and trie

[mandy8055]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.40%. Comparing base (21193ff) to head (8723f9c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #23      +/-   ##
==========================================
+ Coverage   94.07%   96.40%   +2.32%     
==========================================
  Files          10       10              
  Lines        1503     1503              
  Branches      217      232      +15     
==========================================
+ Hits         1414     1449      +35     
+ Misses         88       53      -35     
  Partials        1        1              

see 3 files with indirect coverage changes