test: add tests for Smiles class

[thomasrockhu-codecov]

Summary

• Add app/test_smiles.py covering Smiles.smile().

Stacked on #12 (th/smiles), which introduces the Smiles class.

Test plan

• python -m pytest --cov=app — 5 passed, app/smiles.py at 100% coverage

Made with Cursor

[thomasrockhu-codecov]

Harness Code Coverage report

✅ Patch coverage is 100.00%.
✅ Project coverage is 100.00%. Comparing base (dba612a) to head (be67693).

Additional details and impacted files

@@          Coverage       Diff          @@
##         th/smiles        #13      +/- ##
===========================================
+ Coverage    78.57%    100.00%  +21.43%   
===========================================
  Files            2          3       +1   
  Lines           14         17       +3   
===========================================
+ Hits            11         17       +6   
- Misses           3          0       -3   
  Partials         0          0